Additive Manufacturing (AM) has grown and expanded rapidly, especially towards
AM structural materials for aviation, space, marine, nuclear, and industrial
applications. A lot of effort has been focused on the processing parameters and
powder quality to improve the mechanical properties of additively manufactured
materials for these demanding use cases, where the cost of AM is outweighed by
the potential performance benefits. These materials often possess significant
differences in microstructure from the rapid solidification processing or
post-processing, as compared with more traditionally produced materials. Given
these microstructural differences, evaluation of the environmental degradation
of additively produced materials is essential for the prediction of
microstructure stability, performance, and lifetime in harsh environments.
Typically, AM components also involve higher surface areas, either from process
surface roughness or deliberately designed into the complex geometry part, so
surface treatments and coatings for AM for harsh environments are also of
interest. This symposium welcomes contributions that will foster discussion of
how additively produced materials degrade in:
- corrosive environments
- high temperature, oxidizing environments
- harsh environments while under mechanical stress
- high radiation environments
- environmentally induced cracking (e.g., HE or SCC)
- materials compatibility with liquid metals and molten salts
This symposium is sponsored by the Corrosion and Environmental Effects
Committee of TMS and co-sponsored by Additive Manufactured Committee of TMS and
Nuclear Materials Committee of TMS.
Keywords:
Environmental degradation, additive manufacturing, high-temperature corrosion,
oxidation, high temperature structural alloys, internal oxidation, stresses,
mass loss, oxide scale, water vapor, characterization, environment, hydrogen
embrittlement, stress corrosion cracking
Multiple principal component materials seek to utilize configurational entropy
to stabilize disordered solid solution phases. The most well-known materials in
this novel class include multi-principal element alloys (MPEAs), high-entropy
alloys (HEAs), and high-entropy ceramics (HECs). The numerous combinations of
constituents in such materials represent a huge but under-explored chemical
space and offer considerable freedom in the material design. Among a wide range
of material properties observed based on the compositions selected and
microstructures developed, the exceptional degradation resistance of some MPEAs
and HECs suggests potential applications in severe and extreme environments,
while others exhibit reduced environmental durability. This variation in
behavior demonstrates that gaps in knowledge still exist regarding the effects
of individual elements and their combined effects on reactivity. One can expect
more complex processes to occur in the multicomponent systems, including
selective oxidation and dissolution of various elements, possible
nonstoichiometric oxides and nonequilibrium defect formation, and complicated
synergies between materials and the environment. For these reasons, the current
models lack the capabilities to fully understand and predict degradation
processes in multi principal component materials.
This symposium will provide a platform to discuss and present recent
experimental investigations on environmental degradation behavior, novel
characterization methods development, and advanced theoretical modeling and
computational simulation.
Themes of interest include, but not limited to:
(1) Aqueous and high temperature corrosion, oxidation, and electrochemistry
studies of multicomponent materials such as high entropy alloys, ceramics, and
intermetallic compounds under various corrosive environments.
(2) Thermodynamics and kinetics of formation and growth of secondary phases
including oxide and phase separation in multi-principal elements alloys and
high-entropy ceramics.
(3) Interaction of mechanical stresses and corrosive environments, such as
stress corrosion cracking, corrosion fatigue, and tribocorrosion.
(4) Interaction of ion irradiation and corrosive environments, such as
irradiation affected corrosion and irradiation-assisted stress corrosion
cracking.
(5) Hydrogen pick-up and embrittlement.
(6) Degradation of HEAs in molten salts and liquid metals.
(6) In situ and ex situ electrochemical analysis of oxidation and corrosion
kinetics.
(7) Advanced characterization on the structure and composition of oxidation and
corrosion products.
(8) Multiscale modeling and computational simulation, including density
functional theory, molecular dynamics, kinetic Monte Carlo, CALPHAD, and
phase-field methods.
(9) High-throughput materials design, synthesis, tests, and characterization.
(10) Database and machine learning model developments in high-entropy alloys
and ceramics design.
Environmentally assisted cracking (EAC) is a significant limit for the lifetime
of material components in harsh environments in many fields, such as the oil
and natural gas industry, advanced nuclear power plants, and navy applications.
EAC can occur in metals, alloys, ceramics, composites, and may be a potential
problem in recently developed materials such as additively manufactured
materials, high entropy alloys (multi-principal element alloys), etc.
The purpose of this symposium is to provide an international forum to foster
the discussion of the critical problems in EAC and recent advances in both
experiments and simulations. This symposium seeks technical presentations
related to experimental and modeling studies of various types of EAC, such as
hydrogen embrittlement, stress corrosion cracking, corrosion fatigue, and
liquid metal embrittlement.
The symposium will encompass, but not limited to, the following themes:
• Experimental methods for the performance test of EAC in the laboratory and
real environments;
• Development of physics-based approaches for EAC monitoring and prognostics;
• Multiscale models to understand EAC mechanisms and predict the lifetime of
structural materials in harsh environments;
• Stress corrosion cracking of alloys in high-temperature water, seawater, or
other environment;
• Fracture and fatigue of alloys in hydrogen environment;
• Degradation of materials in liquid metal environment.
Recent developments in the field of compositionally complex materials have
sparked thought-provoking speculations regarding the role of local chemical
ordering (LCO) in various chemistry�–microstructure relationships. The
practical motivation is clear: LCO could present a new dimension for tuning and
designing the behavior of structural and functional materials. Meanwhile, from
a fundamental perspective, the ubiquity of LCO suggests that it might be an
indispensable component of predictive physical models of compositionally
complex materials.
A comprehensive thermodynamic and kinetic framework of LCO and its connections
to microstructural evolution and phase stability is still lacking. This absence
speaks to a considerable challenge in working with the staggering chemical
complexity of LCO, which lies just beyond the capability of current
experimental and computational approaches. In this symposium we will explore
emerging trends on computational and experimental efforts in understanding LCO
and its impact on materials properties. Our goal is to deepen our understanding
of novel concepts and highlight methodological challenges hindering the
quantitative characterization of LCO.
Specific topics include:
LCO impact on defects and microstructural evolution, spanning from atomistic to
the mesoscale.
LCO during early stages of ordering, leading to precipitation of long-range
ordered phases (e.g., L12 and B2)
Nonequilibrium dynamics and kinetics of LCO under extreme driving conditions,
including high strain rate, high/cryogenic temperatures, radiation, and
corrosion
Experimental characterization of LCO, including electrical resistivity
measurements, calorimetry, electron microscopy, and x-ray.
Simulation and modeling approaches, including first-principles methods,
atomistic simulations, thermodynamic modeling, machine learning, and
data-science approaches.
The interplay between a material’s fundamental aging behavior and its
compatibility within a system can have significant impact on highly complex and
expensive technologies found in fields such as: aerospace, satellite and space
exploration, nuclear weapon programs, etc. However, the understanding of a
material’s behavior over its entire service life and that material’s
compatibility within its system during that time is limited and difficult to
predict. Emerging advanced manufacturing industries add to the aging and
compatibility knowledge gaps by introducing completely new materials or
fabricating legacy materials with techniques that allow for new design
capabilities causing them to age differently than their wrought counterpart
(additively manufactured (AM) metals vs. wrought counterparts). Therefore, it
is highly desirable to explore and discuss materials aging and compatibility by
establishing their scientific basis and developing modeling/predictive tools.
This symposium provides an excellent platform for scientists, researchers, and
engineers to present and discuss recent research advances on experimental and
computational modeling on fundamental materials behaviors and their
compatibility under real and accelerated environments.
Topics of interest for abstract submission include (but not limited to):
1.Scientifically informed accelerated aging methodologies.
2.Experimental, computational, and analytical evaluation of materials
degradation during accelerated aging environments with individual or some
combination of stressors such as mechanical, corrosive, thermal, etc.
3.Compatibility studies for materials joining: brazing, welding and soldering.
4.Long life system compatibility of two or more different materials.
5.Discussion of simulated and experimental data similitude as a method to
predict lifetimes.
6.Machine learning approaches to predict material/component lifetime.
The use of molten salts as a coolant in molten salt reactors (MSR) and
concentrating solar power (CSP) systems offers many advantages including low
operating pressures, high temperatures, and favorable heat transfer. Molten
salts are also widely used in the metal processing and nuclear fuels
reprocessing industries. Despite the advantages, the highly aggressive molten
salts present a challenging environment for salt-facing materials.
This symposium covers all aspects of materials science, chemistry, and
electrochemistry in molten salt systems for diverse purposes such as energy
transfer, energy storage, metallurgical processing, and actinide recovery.
Abstracts are solicited in, but not limited to, the following topics:
• Corrosion of salt-facing materials
• Salt effects in graphite and moderator materials
• Fission product embrittlement
• Alloy selection and design for molten salt applications
• Interaction of fission products with materials
• Mechanical and creep properties
• Electrochemistry for metal processing and actinide recovery
• Salt chemistry effects on materials including radiolysis
• Heat exchanger design
• Welding and cladding issues
• Waste handling and actinide recovery
• Electrochemistry for salt property evaluation
Advanced nuclear reactors are a promising addition to expand the domestic and
worldwide sustainable energy portfolio in the wake of climate change. However,
qualification of materials suitable to meet the operational needs of different
reactor technologies has not matured, especially for corrosion performance.
According to the World Corrosion Organization, the annual direct cost of
corrosion is over 1.8 trillion dollars worldwide. This issue extends into
maximizing the operational lifespan of advanced nuclear reactors including
molten salt nuclear reactors, sodium-cooled and lead-cooled fast reactors, and
high temperature gas-cooled reactors, which introduce operational environments
that require the highest performing nuclear materials to construct. Thus, there
is an increasing need to expand the fundamental framework of the corrosion
behaviors of nuclear structural materials. The aim of this symposium is to
provide a space to discuss current progress in our understanding of how the
corrosion mechanism of nuclear structural materials is impacted by the
environmental stressors introduced by advanced nuclear reactors, including
temperature, corrosion medium, atmospheric composition, the presence of
actinide and transuranic species, ion/neutron irradiation, etc.
Topic areas for this symposium include but are not limited to:
• The impact of actinide and fissile by-product species on corrosion
mechanisms.
• The impact of irradiation on the corrosion behaviors of materials.
• The relationship between environmentally induced (e.g. temperature,
irradiation, etc.) phase transformations and corrosion mechanisms.
• The intersectionality between radioactive species and irradiation on the
corrosion mechanism in molten salt environments
• High temperature corrosion of nuclear structural materials and cladding in
liquid sodium, lead, or lead-bismuth eutectic coolant mixtures
• Structural alloy and graphite corrosion at high temperature conditions
• The intersectionality between mechanically induced phenomena (e.g.
environmentally-induced stress corrosion cracking) and corrosion mechanism
For over thirty-five years, Professor Brian Gleeson has been a leader in
corrosion science advancing understanding of the high temperature oxidation and
degradation of alloys and coatings. Brian has illuminated key thermodynamic and
kinetic aspects controlling the degradation of materials in harsh environments,
from gas/solid reactions to diffusion in the alloy and everything in between.
Brian's research career has included positions in Canada, Australia, and the
USA. Brian began his academic career at the University of New South Wales in
1990, moving to Iowa State University in 1998, before settling at the
University of Pittsburgh in 2007 where he builds upon a rich history of high
temperature corrosion research at the school. Throughout this time Brian’s
expertise, unassuming nature, and genuine interest in both research and
teaching has helped to shape countless students and young researchers
comprising the next generation of high temperature corrosion scientists and
engineers.
This symposium serves to recognize the exceptional quality of research and
mentorship that Brian has demonstrated throughout his career. As with Brian’s
own research, this symposium will cover
all aspects of the high temperature corrosion process. The aim of this special
symposium is to provide a forum for scientists and engineers to present and
discuss recent work on current understanding and characterization of corrosion
in high temperature aggressive environments. To align with Prof. Gleeson’s
areas of research, specific forms of degradation include but not limited to
mixed-gas attack (e.g., oxidation-sulfidation, oxidation-carburization,
oxidation-chloridation), hot corrosion, deposit-induced attack, and metal
dusting. These forms of attack may be in combination with some form of
mechanical loading (e.g., fatigue and creep) and/or thermal cycling.
This symposium will showcase the latest developments in computational assisted
design of materials for improved corrosion resistance. Computational modeling
studies are sought that (a) provide insights into the mechanisms of corrosion,
(b) allow for advanced prediction of corrosion induced degradation, and (c)
provide the basis for the development of corrosion resistant materials.
Predictive modeling of both aqueous and high temperature corrosion is
challenging due to the complexity of the underlying mechanisms, their
dependence on scale morphology, alloy microstructure, surface preparation, and
lack of thermodynamic-kinetic data. Advances in computing power have provided
the impetus for application of modeling methods that utilize one or more
approaches such as machine learning, molecular dynamics, density functional
theory and phase field to develop new materials and to better understand
materials factors that confer or control corrosion resistance.
The symposium encourages, but is not limited to, the following areas of
interest:
1. Modeling and simulation of aqueous and/or high temperature corrosion
processes
2. Modeling of microstructural evolution (oxide scale morphology, alloy
microstructure)
3. Modeling and simulation of oxide scale cracking and spallation
4. Multiscale/multiphysics modeling strategies to predict influence of alloy
composition and exposure conditions on high temperature oxidation behavior
5. Machine learning and/or ICME for design of corrosion resistant materials
5. Predictive modelling of materials degradation and lifetime in corrosive
environments
The purpose of this symposium is to bring together researchers, practitioners,
and professionals from academia, industry, and government to discuss the latest
research findings, technological developments, and practical solutions related
to the environmental degradation and corrosion of advanced new materials,
including structural materials, functional materials and additive manufactured
materials.
The symposium will focus on the following topics:
Corrosion mechanisms and kinetics in advanced materials under different
environmental conditions, such as environmental assisted cracking (EAC) and
localized corrosion in aqueous, irradiation, high-pressure, acidic, alkaline,
and saline environments.
Environmental degradation of advanced materials caused by various factors at
room or low temperatures, including electrochemical reactions, mechanical
stress, and exposure to radiation and pollutants.
Advanced techniques for characterizing and monitoring the corrosion and
degradation of advanced materials, such as electrochemical methods, microscopy,
and spectroscopy.
Computational modeling and simulation of corrosion kinetics and thermodynamics,
including density functional theory, molecular dynamics, kinetic Monte Carlo,
CALPHAD, and phase-field methods.
Novel coating materials and surface engineering for preventing or mitigating
corrosion and environmental degradation of advanced material systems, such as
corrosion inhibitors, protective coatings, and self-healing materials.
Increased Long-term Corrosion Resistance of the Nuclear Waste Storage Materials
is Critical to Restrict the Escape of the Radioactive Products into the
Environment.
This Symposium will Enclose Two Major Topics:
1) Improvement of Nuclear Waste (NW) Glasses (Borosilicate, Phosphate, etc.)
and Glass-ceramics (GC) Long-term Durability (LTD) at the Geological Repository
(GR), through Understanding and Predicting their Dissolution Kinetics,
including Identifying the Rate-limiting Step of their Aqueous Corrosion as well
as the appropriate Mechanical Properties MP such as Toughness, Strength, etc.,
to their LTD, and the Parameters that Affect them, as they are arising from the
Composition, Processing and Structure and are relevant to their Corrosion
Thermodynamics and Kinetics, as well as their achieved MP. There are under
consideration Two Possible Systems for practical Glass and GC utilization: NW
Glasses (NWG) poured as a Melt in Steel Canisters or solely NW Canisters made
Entirely from Glass or GC. Whenever possible, it is invited a Correlation:
Processing Parameters-Structure-Properties (PSP) for Properties such as
Corrosion Kinetics, Solubility of Fission Products, MP as Toughness, Strength,
etc., and other Properties relevant to the Achieved Performance of the NW
Storage Materials.
2) Studies Addressing the Understanding of the Mechanism of Stress Corrosion
Cracking (SCC) of Stainless-steel (SS) Canisters used for Temporary Storage of
NW at the Ground Level, and Means to Repair and Mitigate their SCC.
Investigations on Long-term (LT) Corrosion Resistance of Selected SS and other
Corrosion Resistant Alloys’ (CRA) for Canisters to host Glasses that Immobilize
NW, for LT storage, deep underground, at the GR, is of particular interest.
Establishing PSP relationships are sought for.
Modeling by Simulations and Machine Learning (ML), as well as Physics-informed
ML, Predict the Material(s) Properties, Design NWG and/or NWGC and CRA for
Canisters to Store Materials that Immobilize NW (MINW), and Experimental Work
to further Investigate Details of the Corrosion Process, as well as Details of
the Structure of MINW, Evaluate relevant MP of the NWG and NWGC Storage
Canisters, and Establish the Structure-Properties Relationships are Expected in
Both Sections.
Developments in the Characterization Techniques of the NWSM Microstructure and
Atomic Structure and their Changes During the Corrosion Process, such as
Neutron Diffraction, High-Energy X-Ray Diffraction, Extended X-Ray Absorption
Fine Structure (EXAFS), Nuclear Magnetic Resonance (NMR), Raman Spectroscopy
and Electron
Microscopy, and ML for Image/Microstructure Analysis of Oxide Glasses are
Looked for.
High temperature materials are used in aerospace, power generation, and
chemical processing industries where components are expected to withstand
superior temperatures, high stresses, and reactive environments during service
intervals that last for decades. In order to design these components, methods
to accelerate service degradation are needed such that a mechanistic
understanding can be developed in a much shorter time frame, typically on the
order of months. In this symposium, abstracts are requested on topics including
but not limited to:
• Accelerated creep and fatigue testing methodologies, modeling frameworks, and
prediction capabilities
• Modeling and/or experimental methods to accelerate microstructure evolution
and/or mechanical property degradation at elevated temperatures and/or
aggressive environments
• Experimental methods to accelerate environmental interaction of high
temperature materials
• Interactions of creep, fatigue, environmental effects, and microstructure
evolution
Multiple principal component materials seek to utilize configurational entropy
to stabilize disordered solid solution phases. The most well-known materials in
this novel class include multi-principal element alloys (MPEAs), high-entropy
alloys (HEAs), and high-entropy ceramics (HECs). The numerous combinations of
constituents in such materials represent a huge but under-explored chemical
space and offer considerable freedom in the material design. Among a wide range
of material properties observed based on the compositions selected and
microstructures developed, the exceptional degradation resistance of some MPEAs
and HECs suggests potential applications in severe and extreme environments,
while others exhibit reduced environmental durability. This variation in
behavior demonstrates that gaps in knowledge still exist regarding the effects
of individual elements and their combined effects on reactivity. One can expect
more complex processes to occur in the multicomponent systems, including
selective oxidation and dissolution of various elements, possible
nonstoichiometric oxides and nonequilibrium defect formation, and complicated
synergies between materials and the environment. For these reasons, the current
models lack the capabilities to fully understand and predict degradation
processes in multi principal component materials.
This symposium will provide a platform to discuss and present recent
experimental investigations on environmental degradation behavior, novel
characterization methods development, and advanced theoretical modeling and
computational simulation.
Themes of interest include, but not limited to:
(1) Aqueous and high temperature corrosion, oxidation, and electrochemistry
studies of multicomponent materials such as high entropy alloys, ceramics, and
intermetallic compounds under various corrosive environments.
(2) Thermodynamics and kinetics of formation and growth of secondary phases
including oxide and phase separation in multi-principal elements alloys and
high-entropy ceramics.
(3) Interaction of mechanical stresses and corrosive environments, such as
stress corrosion cracking, corrosion fatigue, and tribocorrosion.
(4) Interaction of ion irradiation and corrosive environments, such as
irradiation affected corrosion and irradiation-assisted stress corrosion
cracking.
(5) Hydrogen pick-up and embrittlement.
(6) Degradation of HEAs in molten salts and liquid metals.
(6) In situ and ex situ electrochemical analysis of oxidation and corrosion
kinetics.
(7) Advanced characterization on the structure and composition of oxidation and
corrosion products.
(8) Multiscale modeling and computational simulation, including density
functional theory, molecular dynamics, kinetic Monte Carlo, CALPHAD, and
phase-field methods.
(9) High-throughput materials design, synthesis, tests, and characterization.
(10) Database and machine learning model developments in high-entropy alloys
and ceramics design.
Environmentally assisted cracking (EAC) is a significant limit for the lifetime
of material components in harsh environments in many fields, such as the oil
and natural gas industry, advanced nuclear power plants, and navy applications.
EAC can occur in metals, alloys, ceramics, composites, and may be a potential
problem in recently developed materials such as additively manufactured
materials, high entropy alloys (multi-principal element alloys), etc.
The purpose of this symposium is to provide an international forum to foster
the discussion of the critical problems in EAC and recent advances in both
experiments and simulations. This symposium seeks technical presentations
related to experimental and modeling studies of various types of EAC, such as
hydrogen embrittlement, stress corrosion cracking, corrosion fatigue, and
liquid metal embrittlement.
The symposium will encompass, but not limited to, the following themes:
* Experimental methods for the performance test of EAC in the laboratory and
real environments;
* Development of physics-based approaches for EAC monitoring and prognostics;
* Multiscale models to understand EAC mechanisms and predict the lifetime of
structural materials in harsh environments;
* Stress corrosion cracking of alloys in high-temperature water, seawater, or
other environment;
* Fracture and fatigue of alloys in hydrogen environment;
* Degradation of materials in liquid metal environment.
Local ordering, either chemically or structurally, has received increasing
attention in the past few years. In bulk metallic glasses, the short-
/medium-range order (SRO/MRO) plays a critical role in the deformation process,
such as the formation of shear-band. In simple solid-solution alloys such as
Ni-Cr, the degree of SRO has recently been shown to impact the percolation
limit in a corrosion process. In multi-principal element alloys such as high
entropy alloys, the chemically SRO could affect the work hardening and
radiation resistance. The emergent concept of local ordering presents a new
dimension for further tuning the behaviors in structural materials, including
mechanical performance, radiation tolerance, and corrosion resistance. However,
a fundamental and predictive understanding of the thermodynamics, kinetics and
structure-property relationship is lacking due to local atomic-level disordered
features. This symposium focuses on computational and experimental efforts,
which promote the development of concepts and methodologies to understand local
ordering in materials.
Specific topics include:
- Understanding structural and chemical SRO/MRO in amorphous materials and
crystalline alloys via advanced experimental characterization, simulation, and
modeling
- The role of SRO/MRO on defect and microstructure evolution at atomistic to
microscopic length-scales
- Non-equilibrium dynamics and kinetics under extreme driving conditions,
including high strain rate, high/cryogenic temperature, radiation, and corrosion
- Experimental characterizations and in-situ techniques, including S/TEM, 4D
STEM, SEM, in situ TEM, X-Ray,
- Simulation and modeling algorithms, including first-principles methods,
atomistic simulation, kinetic Monte Carlo, machine learning
The use of molten salts as a coolant in molten salt reactors (MSR) and
concentrating solar power (CSP) systems offers many advantages including low
operating pressures, high temperatures, and favorable heat transfer. Molten
salts are also widely used for energy storage, and in the metal processing and
nuclear fuels reprocessing industries. Despite the advantages, the highly
aggressive molten salts present a challenging environment for salt-facing
materials.
This symposium covers all aspects of materials science, chemistry, and
electrochemistry in molten salt systems for diverse purposes such as energy
transfer, energy storage, metallurgical processing, and actinide recovery.
Abstracts are solicited in, but not limited to, the following topics:
• Corrosion of salt-facing materials
• Salt effects in graphite and moderator materials
• Fission product embrittlement
• Alloy selection and design for molten salt applications
• Interaction of fission products with materials
• Mechanical and creep properties
• Electrochemistry for metal processing and actinide recovery
• Salt chemistry effects on materials including radiolysis
• Heat exchanger design
• Welding and cladding issues
• Waste handling and actinide recovery
• Electrochemistry for salt property evaluation
Advanced nuclear reactors are a promising addition to expand the domestic and
worldwide sustainable energy portfolio in the wake of climate change. However,
qualification of materials suitable to meet the operational needs of different
reactor technologies has not matured, especially for corrosion performance.
According to the World Corrosion Organization, the annual direct cost of
corrosion is over 1.8 trillion dollars worldwide. This issue extends into
maximizing the operational lifespan of advanced nuclear reactors including
molten salt nuclear reactors, sodium-cooled and lead-cooled fast reactors, and
high temperature gas-cooled reactors, which introduce operational environments
that require the highest performing nuclear materials to construct. Thus, there
is an increasing need to expand the fundamental framework of the corrosion
behaviors of nuclear structural materials. The aim of this symposium is to
provide a space to discuss current progress in our understanding of how the
corrosion mechanism of nuclear structural materials is impacted by the
environmental stressors introduced by advanced nuclear reactors, including
temperature, corrosion medium, atmospheric composition, the presence of
actinide and transuranic species, ion/neutron irradiation, etc.
Topic areas for this symposium include but are not limited to:
• The impact of actinide and fissile by-product species on corrosion
mechanisms.
• The impact of irradiation on the corrosion behaviors of materials.
• The relationship between environmentally induced (e.g. temperature,
irradiation, etc.) phase transformations and corrosion mechanisms.
• The intersectionality between radioactive species and irradiation on the
corrosion mechanism in molten salt environments
• High temperature corrosion of nuclear structural materials and cladding in
liquid sodium, lead, or lead-bismuth eutectic coolant mixtures
• Structural alloy and graphite corrosion at high temperature conditions
• The intersectionality between mechanically induced phenomena (e.g.
environmentally-induced stress corrosion cracking) and corrosion mechanism
Materials development for extreme environments including high temperature
turbines and nuclear reactors involves the development of alloys which are
resilient against a variety of degradation mechanisms. These degradation
mechanisms include oxidation/corrosion, hydrogen embrittlement, precipitation
hardening or instabilities, phase decomposition, fatigue, and wear. Traditional
structural alloys such as austenitic steels and Ni superalloys, as well as new
material systems such as multicomponent alloys or multiple principal element
alloys can all suffer from a variety of phase instabilities that are likely to
impact long term performance. Understanding material stability in these extreme
environments is paramount to enhancing the lifetime of key components.
The purpose of this symposium is to create a forum where researchers from
across academia, national laboratories, and industry can share insights on
recent advancements and the practical impact of phase stability on the
performance of alloy systems. This includes current materials for applications
such as light water reactors and power/aviation turbine systems as well as
future applications such as fusion reactors and hydrogen power systems. A
variety of perspectives from modeling and simulation to predict behavior and
lab scale testing to failure analysis of field components will help to create a
fuller understanding of mechanisms and impact.
Experimental and/or theoretical studies are sought on topics including but not
limited to:
-Phase separation or decomposition in extreme environments
-Radiation induced phase transformations
-Deformation induced phase transformations (e.g. deformation induced martensite)
-Long term thermal aging
-High temperature thermal cycling
-Impact of phase stability on hydrogen embrittlement
-Impact of phase stability on stress corrosion cracking
Over the past 10 years, Additive Manufacturing (AM) has grown and expended
throughout different areas of application. A lot of effort has been focused on
the processing parameters and powder quality to improve the mechanical
properties of additive manufactured materials. These materials often possess
significant differences in microstructure as compared with more traditionally
produced materials. Given these microstructural differences, evaluation of
environmental degradation of additively-produced materials is essential for the
prediction of performance and life in harsh environments. Additively processed
structural materials could potentially be used in aviation, space, marine and
industrial applications. This symposium welcomes contributions that will foster
discussion on how additively produced materials degrade in:
- corrosive environments
- high temperature, oxidizing environments
- harsh environments while under mechanical stress
- high radiation environments
- localized corrosion and pitting corrosion
Keywords:
Environmental degradation, additive manufacturing, corrosion, oxidation, high
temperature structural alloys, internal oxidation, stresses, mass loss, oxide
scale, water vapor, characterization, environment
Multiple principal component materials seek to utilize configurational entropy
to stabilize disordered solid solution phases. The most well-known materials in
this novel class include multi-principal element alloys (MPEAs) and
high-entropy ceramics (HECs). The numerous combinations of constituents in such
materials represent a huge but under-explored chemical space and offer
considerable freedom in the material design. Among a wide range of material
properties observed based on the compositions selected and microstructures
developed, the exceptional degradation resistance of some MPEAs and HECs
suggests potential applications in severe and extreme environments, while
others exhibit reduced environmental durability. This variation in behavior
demonstrates that gaps in knowledge still exist regarding the effects of
individual elements and their combined effects on reactivity. One can expect
more complex processes to occur in the multicomponent systems, including
selective oxidation and dissolution of various elements, possible
nonstoichiometric oxides and nonequilibrium defect formation, and complicated
synergies between materials and the environment. For these reasons, the current
models lack the capabilities to fully understand and predict degradation
processes in multi principal component materials.
This symposium will provide a platform to discuss and present recent
experimental investigations on environmental degradation behavior, novel
characterization methods development, and advanced theoretical modeling and
computational simulation.
Themes of interest include, but not limited to:
(1). Aqueous and high temperature corrosion, oxidation, and electrochemistry
studies of multicomponent materials such as high entropy alloys, ceramics, and
intermetallic compounds under various corrosive environments
(2). Thermodynamics and kinetics of formation and growth of secondary phases
including oxide and phase separation in multi-principal elements alloys and
high-entropy ceramics
(3). Interaction of mechanical stresses and corrosive environments, such as
stress corrosion cracking, corrosion fatigue, and tribocorrosion
(4). Interaction of ion irradiation and corrosive environments, such as
irradiation affected corrosion and irradiation-assisted stress corrosion
cracking
(5). Hydrogen pick-up and embrittlement
(6). In situ and ex situ electrochemical analysis of oxidation and corrosion
kinetics
(7). Advanced characterization on the structure and composition of oxidation
and corrosion products
(8). Multiscale modeling and computational simulation, including density
functional theory, molecular dynamics, kinetic Monte Carlo, CALPHAD, and
phase-field methods
(9). High-throughput materials design, synthesis, tests, and characterization
(10). Database and machine learning model developments in high-entropy alloys
and ceramics design
Environmentally assisted cracking (EAC) is a significant limit for the lifetime
of material components in harsh environments in many fields, such as the oil
and natural gas industry, advanced nuclear power plants, and navy applications.
EAC can occur in metals, alloys, ceramics, composites, and may be a potential
problem in recently developed materials such as additively manufactured
materials, high entropy alloys (multi-principal element alloys), etc.
The purpose of this symposium is to provide an international forum to foster
the discussion of the critical problems in EAC and recent advances in both
experiments and simulations. This symposium seeks technical presentations
related to experimental and modeling studies of various types of EAC, such as
hydrogen embrittlement, stress corrosion cracking, corrosion fatigue, and
liquid metal embrittlement.
The symposium will encompass, but not limited to, the following themes:
• Experimental methods for the performance test of EAC in the laboratory and
real environments;
• Development of physics-based approaches for EAC monitoring and prognostics;
• Multiscale models to understand EAC mechanisms and predict the lifetime of
structural materials in harsh environments;
• Stress corrosion cracking of alloys in high-temperature water, seawater, or
other environment;
• Fracture and fatigue of alloys in hydrogen environment;
• Degradation of materials in liquid metal environment.
Local ordering, either chemically or structurally, has received increasing
attention in the past few years. In bulk metallic glasses, the short-
/medium-range order (SRO/MRO) plays a critical role in the deformation process,
such as the formation of shear-band. In simple solid-solution alloys such as
Ni-Cr, the degree of SRO has recently been shown to impact the percolation
limit in a corrosion process. In multi-principal element alloys such as the
high entropy alloys, the chemically SRO could affect the work hardening and
radiation resistance. The emergent concept of local ordering presents a new
dimension for further tuning the behaviors in structural materials, including
mechanical performance, radiation tolerance, and corrosion resistance. However,
a fundamental and predictive understanding of the thermodynamics, kinetics, and
structure-property relationship is lacking due to local atomic-level disordered
features. This symposium focuses on computational and experimental efforts,
which promote the development of concepts and methodologies to understand local
ordering in materials.
Specific topics include:
- Understanding structural and chemical SRO/MRO in amorphous materials and
crystalline alloys via advanced experimental characterization, simulation, and
modeling
- The role of SRO/MRO on defect and microstructure evolution at atomistic to
microscopic length-scales
- Non-equilibrium dynamics and kinetics under extreme driving conditions,
including high strain rate, high/cryogenic temperature, radiation, and corrosion
- Experimental characterizations and in-situ techniques, including S/TEM, 4D
STEM, SEM, in situ TEM, X-Ray,
- Simulation and modeling algorithms, including first-principles methods,
atomistic simulation, kinetic Monte Carlo, machine learning
The use of molten salts as a coolant in molten salt reactors (MSR) and
concentrating solar power (CSP) systems offers many advantages including low
operating pressures, high temperatures, and favorable heat transfer. Molten
salts are also widely used in the metal processing and nuclear fuels
reprocessing industries. Despite the advantages, the highly aggressive molten
salts present a challenging environment for salt facing materials.
This symposium covers all aspects of materials science, chemistry, and
electrochemistry in molten salt systems for diverse purposes such as energy
transfer, energy storage, metallurgical processing, and actinide recovery.
Abstracts are solicited in, but not limited to, the following topics:
Corrosion of salt-facing materials
Salt effects in graphite and moderator materials
Fission product embrittlement
Alloy selection and design for molten salt applications
Interaction of fission products with materials
Mechanical and creep properties
Electrochemistry for metal processing and actinide recovery
Salt chemistry effects on materials including radiolysis
Heat exchanger design
Welding and cladding issues
Waste handling and actinide recovery
Electrochemistry for salt property evaluation
Materials development for extreme environments including high temperature
turbines and nuclear reactors involves the development of alloys which are
resilient against a variety of degradation mechanisms. These degradation
mechanisms include oxidation/corrosion, hydrogen embrittlement, precipitation
hardening or instabilities, phase decomposition, fatigue, and wear. Traditional
structural alloys such as austenitic steels and Ni superalloys, as well as new
material systems such as multicomponent alloys or multiple principal element
alloys can all suffer from a variety of phase instabilities that are likely to
impact long term performance. Understanding material stability in these extreme
environments is paramount to enhancing the lifetime of key components.
The purpose of this symposium is to create a forum where researchers from
across academia, national laboratories, and industry can share insights on
recent advancements and the practical impact of phase stability on the
performance of material systems. This includes current materials for
applications such as light water reactors and power/aviation turbine systems as
well as future applications such as fusion reactors and hydrogen power systems.
A variety of perspectives from modeling and simulation to predict behavior and
lab scale testing to failure analysis of field components will help to create a
fuller understanding of mechanisms and impact.
Experimental and/or theoretical studies are sought on topics including but not
limited to:
-Phase separation or decomposition in extreme environments
-Radiation induced phase transformations
-Deformation induced phase transformations (e.g. deformation induced martensite)
-Long term thermal aging
-High temperature thermal cycling
-Impact of phase stability on hydrogen embrittlement
-Impact of phase stability on stress corrosion cracking
Carolyn M Hansson is a Professor at the University of Waterloo in the
department of Mechanical and Mechatronics Engineering and cross-appointed to
the department of Civil and Environmental Engineering. In 2021, she will be
celebrating her 80th birthday. The technical scope of this symposium are topics
that intersect with one or more of her areas of expertise. While her focus has
been primarily with concrete and steels, for the purposes of this symposium we
will include all materials for greater inclusivity.
The topics of interest include corrosion, erosion, and wear of materials;
durability of construction materials; corrosion and electrochemical techniques;
techniques for measuring the amount of degradation; rust-resistant reinforcing
materials; sustainable materials; cement and concrete; and materials to
maintain the integrity of structures.
Carolyn Hansson was the first female student to attend the Royal School of
Mines at Imperial College, London, and the first woman to graduate with a PhD
in metallurgy from the same. She is Fellow of the Canadian Academy of
Engineering, Fellow of the Royal Society of Canada, Fellow of the American
Concrete Institute, Fellow of the Minerals, Metals and Materials Society (US),
and Fellow of the Institute of Materials, Minerals and Mining (UK). Professor
Hansson is the Associate Editor for Cement and Concrete Research and a member
of the Executive Committee of the Board of Governors of Acta Materialia.
A key feature of this symposium will be a 45 minute Fireside Chat with Carolyn
Hansson. There will be two people asking questions (one of which is a budding
metallurgist and corrosion expert). The key aspect to this part will be to hear
Carolyn's story. Specifically, what her career path was like, what advice she
has for young people (particularly those that are underrepresented) in moving
forward in a research and academic career, and what she is excited about in the
future research in her field.
After the Fireside chat, short talks that align with poster presentations will
occur.
Contributed talks will be 5 minutes (3 slides max) in duration to introduce the
author’s poster.
Invited talks will be 10 minutes (6 slides max) to discuss the impact of Dr.
Hansson and/or the impact of her research on your career and may include an
introduction to your poster (poster presentation along with the invited talks
are encouraged for this symposium).
The goal of the above is to avoid the typical symposium style and encourage a
deeper level of interaction and networking.
Immediately following the 5 and 10 minute introductory talks, all authors will
move to their poster and all in attendance will mingle to discuss in detail the
work highlighted in the short talks. The Poster Session will be held in the
symposium room immediately following the Fireside Chat and Invited/Contributed
Talks. The Poster Session will be an interactive/networking component.
Over the past 10 years, Additive Manufacturing (AM) has grown and expended
throughout different areas of application. A lot of effort has been focused on
the processing parameters and powder quality to improve the mechanical
properties of additive manufactured materials. These materials often possess
significant differences in microstructure as compared with more traditionally
produced materials. Given these microstructural differences, evaluation of
environmental degradation of additively-produced materials is essential for the
prediction of performance and life in harsh environments. Additively processed
structural materials could potentially be used in aviation, space, marine and
industrial applications. This symposium welcomes contributions that will foster
discussion on how additively produced materials degrade in:
- corrosive environments
- stress corrosion cracking
- high temperature, oxidizing environments
- harsh envrionments while under mechanical stress
- high radiation environments
This symposium is sponsored by the Corrosion and Environmental Effects
committee of TMS and co-sponsored by Additive Manufactured Committee of TMS.
Keywords:
Environmental degradation, additive manufacturing, corrosion, oxidation, high
temperature structural alloys, internal oxidation, stresses, mass loss, oxide
scale, water vapor, characterization, environment, radiation, stress corrosion
cracking, aquaious corrosion
Multiple principal component materials seek to utilize configurational entropy
to stabilize disordered solid solution phases. The most well-known materials in
this novel class include multi-principal element alloys and high-entropy
ceramics. The numerous combinations of constituents in such materials represent
a huge but under-explored chemical space and offer considerable freedom in the
material design. Among a wide range of material properties observed based on
the compositions selected and microstructures developed, some high-entropy
materials' exceptional degradation resistance shows potential applications in
severe and extreme environments, while other high-entropy materials exhibit
reduced environmental durability. This variation in behavior demonstrates that
gaps in knowledge still exist regarding each element's individual functions and
combined elements' effects on reactivity. One can expect more complex processes
to occur in the multicomponent systems, including selective oxidation and
dissolution of various elements, possible nonstoichiometry and nonequilibrium
oxides formation, and the synergies between materials and the environments. For
these reasons, the current models lack the capabilities to fully understand and
predict degradation processes in multi principal component materials.
This symposium will provide a platform to discuss and present recent
experimental investigations on environmental degradation behavior, novel
characterization methods development, and advanced theoretical modeling and
computational simulation.
Themes of interest include, but not limited to:
(1) Aqueous and high temperature corrosion, oxidation, and electrochemistry
studies of multicomponent materials such as high entropy alloys, ceramics, and
intermetallic compounds under various corrosive environments
(2) Thermodynamics and kinetics of formation and growth of secondary phases
including oxide and phase separation in multi-principal elements alloys and
high-entropy ceramics
(3) Interaction of mechanical stresses and corrosive environments, such as
stress corrosion cracking, corrosion fatigue, and tribocorrosion
(4) Interaction of ion irradiation and corrosive environments, such as
irradiation affected corrosion and irradiation-assisted stress corrosion
cracking
(5) Hydrogen pick-up and embrittlement
(6) In situ and ex situ electrochemical analysis of oxidation and corrosion
kinetics
(7) Advanced characterization on the structure and composition of oxidation and
corrosion products
(8) Multiscale modeling and computational simulation, including density
functional theory, molecular dynamics, kinetic Monte Carlo, CALPHAD, and
phase-field methods
(9) High-throughput materials design, synthesis, tests, and characterization
(10) Database and machine learning model developments in high-entropy alloys
and ceramics design
Environmentally assisted cracking (EAC) is a significant limit for the lifetime
of material components in harsh environments in many fields, such as the oil
and natural gas industry, advanced nuclear power plants, and navy applications.
EAC can occur in metals, alloys, ceramics, composites, and may be a potential
problem in recently developed materials such as additively manufactured
materials, high entropy alloys (multi-principal element alloys), etc.
The purpose of this symposium is to provide an international forum to foster
the discussion of the critical problems in EAC and recent advances in both
experiments and simulations. This symposium seeks technical presentations
related to experimental and modeling studies of various types of EAC, such as
hydrogen embrittlement, stress corrosion cracking, corrosion fatigue, and
liquid metal embrittlement.
The symposium will encompass, but not limited to, the following themes:
• Experimental methods for the performance test of EAC in the laboratory and
real environments;
• Development of physics-based approaches for EAC monitoring and prognostics;
• Multiscale models to understand EAC mechanisms and predict the lifetime of
structural materials in harsh environments;
• Stress corrosion cracking of alloys in high-temperature water, seawater, or
other environment;
• Fracture and fatigue of alloys in hydrogen environment;
• Degradation of materials in liquid metal environment.
The use of molten salts as a coolant in molten salt reactors (MSR) and
concentrating solar power (CSP) systems offers many advantages including low
operating pressures, high temperatures, and favorable heat transfer. Molten
salts are also widely used in the metal processing and nuclear fuels
reprocessing industries. Despite the advantages, the highly aggressive molten
salts present a challenging environment for salt facing materials.
This symposium covers all aspects of materials science, chemistry, and
electrochemistry in molten salt systems for diverse purposes such as energy
transfer, energy storage, metallurgical processing, and actinide recovery.
Abstracts are solicited in, but not limited to, the following topics:
Corrosion of salt-facing materials
Salt effects in graphite and moderator materials
Fission product embrittlement
Alloy selection and design for molten salt applications
Interaction of fission products with materials
Mechanical and creep properties
Electrochemistry for metal processing and actinide recovery
Salt chemistry effects on materials including radiolysis
Heat exchanger design
Welding and cladding issues
Waste handling and actinide recovery
Electrochemistry for salt property evaluation
Since his arrival in the United States in 1982 with a Doctor of Metallurgy from
the University of Oxford, Ian M. Robertson has advanced our physical
understanding of materials response under extreme conditions, including gaseous
hydrogen atmospheres, corrosive environments, high stress/strain rates, and
exposure to radiation. Over forty years of research at the University of
Illinois Urbana-Champaign and Wisconsin-Madison, he has pioneered a range of in
situ TEM techniques in the areas of environmental TEM, thermomechanical
testing, and MEMS-based quantitative mechanical testing, as well as advanced
focused ion beam (FIB)-based sample preparation. These techniques were
developed with the goal of elucidating the basic physical mechanisms governing
plasticity, material degradation, and failure processes. The contributions from
his lab permitted the development, refinement, and validation of many theories
and theoretical models, most notably the Hydrogen-Enhanced Localized Plasticity
(HELP) mechanism for hydrogen embrittlement and determining the criteria for
dislocation-grain boundary interactions. His research coupling TEM with
advanced theory and simulation has shaped the current state-of-the-art in
multiple fields and continues to be applied to increasingly complex materials
and environments.
Specific topics include, but are not limited to:
- Development of advanced in situ TEM techniques
- Analysis of late-stage plasticity near crack tips and fracture surfaces
- Understanding hydrogen embrittlement mechanisms
- Exploring the fundamentals of stress corrosion cracking
- Investigating dislocation-interface interactions
- Quantifying the stability of materials to irradiation damage
This symposium was rescheduled from the TMS 2021 Virtual Annual Meeting &
Exhibition.
This symposium will cover the followings:
a) Evaluation of corrosion performance. Variations in test results between
cabinet testing vs. outdoor testing.
b) Development of corrosion inhibiting coatings.
c) Fundamental understanding of corrosion protection mechanism.
d) Analytical tools used to characterize corrosion mechanisms.
e) Challenges to control corrosion under insulation (CUI).
Heavy liquid metals (HLMs) such as molten Pb and lead bismuth eutectic (LBE)
are being proposed as heat transport fluids in advanced nuclear and
concentrated solar power systems due to their low vapor pressure, excellent
thermophysical (high boiling point and thermal conductivity) and neutronic
properties, and thermal energy storage potential. Furthermore, liquid metals
such as Zn, Sn and its alloys are used in other industry applications such as
automotive and next generation of semiconductors (e.g. extreme ultraviolet
lithography).
Due to interest in this technology for a variety of industrial applications, a
symposium on heavy liquid metals (HLMs) including Pb, Bi, Zn, Sn, Sb, LBE and
their compatibility with structural or functional materials is proposed. While
the main focus is on materials issues such as corrosion and liquid/solid metal
embrittlement, it is also essential to cover technological aspects of the use
of liquid metals including chemistry control methods, filtering, in situ
characterization techniques, forced and natural convection methods, and flow
rate measurements. Furthermore, we intend to provide a platform to highlight
recent advances in electrochemical measurements in liquid metals such as
Electrical Impedance Spectroscopy (EIS) or similar techniques. Abstracts are
solicited in the following topics:
- HLM compatibility with structural materials including corrosion, erosion,
and embrittlement
- Solidification of HLM materials
- Active HLM chemistry control and measurement techniques
- Advanced numerical techniques for modeling coolant chemistry in liquid
metals
- Innovative instrumentation including flow rate and temperature measurements
- In situ characterization including mechanical properties, corrosion,
electrochemical methods, and spectroscopy methods
- Integrated HLM experimentation including simultaneous effects of
temperature, flow, impurities, radiation, and/or strain of materials exposed to
HLMs
- Radioisotope retention in molten Pb/LBE
- HLM compatibility with non-metals (e.g. nuclear fuel, MAX phase materials,
CerMets)
- Joining and welding of components exposed to HLMs
Over the past 10 years, Additive Manufacturing (AM) has grown and expanded
throughout different areas of application. A lot of effort has been focused on
the processing parameters and powder quality to improve the mechanical
properties of additive manufactured materials. These materials often possess
significant differences in microstructure as compared with more traditionally
produced materials. Given these microstructural differences, evaluation of
environmental degradation of additively-produced materials is essential for the
prediction of performance and life in harsh environments. Additively processed
structural materials could potentially be used in aviation, space, marine and
industrial applications. This symposium welcomes contributions that will foster
discussion on how additively produced materials degrade in:
- corrosive environments
- high temperature, oxidizing environments
- harsh environments while under mechanical stress
- high radiation environments
Environmentally assisted cracking (EAC) is a significant limit for the lifetime
of material components in harsh environments in many fields, such as the oil
and natural gas industry, advanced nuclear power plants, and navy applications.
EAC can occur in metals, alloys, ceramics, composites, and may be a potential
problem in recently developed materials such as additively manufactured
materials, high entropy alloys (multi-principal element alloys), etc.
The purpose of this symposium is to provide an international forum to foster
the discussion of the critical problems in EAC and recent advances in both
experiments and simulations. This symposium seeks technical presentations
related to experimental and modeling studies of various types of EAC, such as
hydrogen embrittlement, stress corrosion cracking, corrosion fatigue, and
liquid metal embrittlement.
The symposium will encompass, but not limited to, the following themes:
• Experimental methods for the performance test of EAC in the laboratory and
real environments;
• Development of physics-based approaches for EAC monitoring and prognostics;
• Multiscale models to understand EAC mechanisms and predict the lifetime of
structural materials in harsh environments;
• Stress corrosion cracking of alloys in high-temperature water, seawater, or
other environment;
• Fracture and fatigue of alloys in hydrogen environment;
• Degradation of materials in liquid metal environment.
The use of molten salts for molten salt reactors (MSR), concentrating solar
power (CSP) systems, and energy storage offers many advantages including low
operating pressures, high temperatures, and favorable heat transfer. Despite
the advantages, the highly aggressive molten salts present a challenging
environment for salt facing materials. Further, the high temperatures presented
by these systems require exceptional mechanical properties.
This symposium covers all aspects of materials science, chemistry, and
electrochemistry in molten salt systems for heat transfer and energy storage.
Abstracts are solicited in the following topics:
• Corrosion of salt-facing materials
• Salt effects in graphite and moderator materials
• Fission product embrittlement
• Alloy selection and design for molten salt applications
• Interaction of fission products with materials
• Mechanical and creep properties
• Electrochemistry for corrosion analysis
• Salt chemistry effects on materials including radiolysis
• Heat exchanger design
• Welding and cladding issues
• Electrochemistry for salt property evaluation
Superalloys are critical to operation and future design of a wide variety of
propulsion and power generation components in the aerospace, marine, and energy
industries. Their industrial application is often driven by excellent long-term
stability and durability at elevated temperatures or in aggressive environments
because they display a good balance of mechanical strength, fatigue and creep
resistance, as well as corrosion and oxidation resistance. The symposium aims
to attract papers on current and state-of-art application of Ni- and Co-based
superalloys. Topics of interest may include (but are not limited to):
• Viability of fabrication with additive manufacturing methods (powder bed
techniques and direct energy deposition)
• Relationships of metallurgical processing with microstructure and
performance (i.e. casting, forging and heat treatment)
• Mechanisms of ambient and elevated temperature plasticity, creep, fatigue,
creep-fatigue, crack growth and environmental damage
• Mitigation of environmental, thermal, and thermal mechanical damage,
including improved coatings for service operation
• Advancement in joining, repair, and rejuvenation of superalloys
This symposium will cover the followings:
a) Evaluation of corrosion performance. Variations in test results between
cabinet testing vs out-door testing.
b) Development of corrosion inhibiting coatings.
c) Fundamental understanding of corrosion mechanism.
d) Analytical tools used to characterize corrosion mechanisms.
e) Challenges to control corrosion under insulation.
Over the past 10 years, Additive Manufacturing (AM) has grown and expended
throughout different areas of application. A lot of effort has been focused on
the processing parameters and powder quality to improve the mechanical
properties of additive manufactured materials. These materials often possess
significant differences in microstructure as compared with more traditionally
produced materials. Given these microstructural differences, evaluation of
environmental degradation of additively-produced materials is essential for the
prediction of performance and life in harsh environments. Additively processed
structural materials could potentially be used in aviation, space, marine and
industrial applications. This symposium welcomes contributions that will foster
discussion of how additively produced materials degrade in:
- corrosive environments
- high temperature, oxidizing environments
- harsh environments while under mechanical stress
- high radiation environments
-
This symposium is sponsored by the Corrosion and Environmental Effects
committee of TMS and co-sponsored by Additive Manufactured Committee of TMS.
Keywords:
Environmental degradation, additive manufacturing, hot-temperature corrosion,
oxidation, high temperature structural alloys, internal oxidation, stresses,
mass loss, oxide scale, water vapor, characterization, environment
Environmentally assisted cracking (EAC) is a significant limit for the lifetime
of material components in harsh environments in many fields, such as the oil
and natural gas industry, advanced nuclear power plants, and navy applications.
EAC can occur in metals, alloys, ceramics, composites, and may be a potential
problem in recently developed materials such as additively manufactured
materials, high entropy alloys (multi-principal element alloys), etc.
The purpose of this symposium is to provide an international forum to foster
the discussion of the critical problems in EAC and recent advances in both
experiments and simulations. This symposium seeks technical presentations
related to experimental and modeling studies of various types of EAC, such as
hydrogen embrittlement, stress corrosion cracking, corrosion fatigue, and
liquid metal embrittlement.
The symposium will encompass, but not limited to, the following themes:
• Experimental methods for the performance test of EAC in the laboratory and
real environments;
• Development of physics-based approaches for EAC monitoring and prognostics;
• Multiscale models to understand EAC mechanisms and predict the lifetime of
structural materials in harsh environments;
• Stress corrosion cracking of alloys in high-temperature water, seawater, or
other environment;
• Fracture and fatigue of alloys in hydrogen environment;
• Degradation of materials in liquid metal environment;
• EAC in additively manufactured materials and high-entropy alloys.
The use of molten salts as a coolant in molten salt reactors (MSR) and
concentrating solar power (CSP) systems offers many advantages including low
operating pressures, high temperatures, and favorable heat transfer. Molten
salts are also widely used in the metal processing and nuclear fuels
reprocessing industries. Despite the advantages, the highly aggressive molten
salts present a challenging environment for salt facing materials. Further, the
high temperatures presented by these systems require exceptional mechanical
properties.
This symposium covers all aspects of materials science, chemistry, and
electrochemistry in molten salt systems for diverse purposes such as energy
transfer, energy storage, metallurgical processing, and actinide recovery.
Abstracts are solicited in the following topics:
Corrosion of salt-facing materials
Salt effects in graphite and moderator materials
Fission product embrittlement
Alloy selection and design for molten salt applications
Interaction of fission products with materials
Mechanical and creep properties
Electrochemistry for metal processing and actinide recovery
Salt chemistry effects on materials including radiolysis
Heat exchanger design
Welding and cladding issues
Waste handling and actinide recovery
Electrochemistry for salt property evaluation