Structural stability of aerospace and energy related materials, manufactured by
conventional and additive routes, is of great importance to avoid catastrophic
failures during operation. Understanding their thermo-mechanical response under
extreme pressure, temperature, irradiation, or corrosive conditions would
immensely aid in designing alloys, and thereby increasing their lifetimes. This
symposium delves into investigations, focused on using high throughput tools
for accelerated materials discovery and root cause analyses of fielded and new
make parts.
The topics of interest to this symposium include, but are not limited to, the
following:
•ICME tools coupled with multi-scale experimentation to correlate processing
history to microstructural hierarchy and ensuing property response
•ML-based multi objective optimization models targeted towards more reliable
predictive capabilities with realistic (usually small) experimental data
•High throughput experimental approaches for accelerated
material-microstructure-property optimizations to facilitate ML.
•Qualification pathways and status of qualification for next generation
materials and manufacturing processes.
The focus is on structural high temperature and light-weight materials such as
refractory alloys, high entropy alloys, Ni- Co- based alloys, high strength
titanium alloys, maraging steels, alumina-forming steels, and ODS alloys.
A foundational aspect of Materials Science is to understand, characterize, and
predict the underlying mechanisms and behaviors of materials. Computational
modeling and simulation provide many critical insights in these efforts, but
also require constant development, validation, and application of numerical
techniques.
This symposium invites abstracts on the development and application of novel
algorithms for materials science and engineering. This year’s symposium will
especially focus on (but is not limited to) the following topical areas:
Novel methodologies for data mining, machine learning, image processing,
microstructure generation, high-throughput databases and experiments.
Surrogate and reduced-order modeling, and extracting useful insights from large
data sets of numerical and experimental results.
Algorithm development to enhance or accelerate classical computational
materials science tools including density functional theory, molecular
dynamics, Monte Carlo simulation, dislocation dynamics, phase-field modeling,
CALPHAD, crystal plasticity, and finite element analysis.
Development of novel physics-based, multiscale, multi-physics materials
modeling.
Algorithm development for fusing and evaluating the quality of multimodal data
and their incorporation into computational materials workflows.
Uncertainty quantification, statistical metrics from image-based synthetic
microstructure generation, model comparisons, and validation studies related to
novel algorithms and/or methods in computational material science.
Development of novel methodologies for the analysis and management of data,
including best practices for `FAIRization’ of data (FAIR: Findable, Accessible,
Interpretable, Reproducible), as well as best practices for research software
development and dissemination.
Selected presentations will be invited to submit full papers for a IMMI issue
(5-10 papers).
Minor alloying additions, intentional or otherwise, can play an outsized role
in both phase stability and transformation kinetics. We encourage submissions
on all material systems that exhibit such effects, defining dilute as
approximately < 3 at%. Examples include: 1) Elemental additions that alter the
nucleation behavior, promoting or inhibiting nuclei, changing their density and
location, or otherwise altering the transformation pathway through the
formation of intermediary phases or other mechanisms, 2) Additions that alter
the available diffusion pathways and rates of key species within the material,
3) Additions that change the degree or type of chemical ordering, 4) Additions
that impact the interfacial energy of one phase in relation to another, such as
altering the stacking fault energy, to promote or inhibit a phase
transformation, 5) Additions that impact martensitic or strain induced
transformations, including those governing shape memory alloy behavior.
This annual symposium is to honor the memory of a great pioneer in alloy
thermodynamics and microstructures, William Hume-Rothery. According to
Hume-Rothery, the stability of alloy phases and microstructures is critically
dependent on the atomic sizes, the valency electron density, and
electrochemical differences among the constituent atoms, described in a set of
Hume-Rothery rules. These textbook Hume-Rothery rules have been very useful in
providing guidelines for designing phase stability and microstructures not only
of metallic alloys but also of ceramic and semiconductor alloys. The effects of
atomic sizes, valence electron density, and electronegativity of atoms can be
translated into the mechanical and chemical contributions to the thermodynamics
of phases and microstructures. This invitation-only symposium will feature the
2025 TMS William Hume-Rothery awardee as an honored presenter and bring
together experts in theory, computation, and experiments to discuss recent
advances in understanding, predicting, and designing thermodynamic stability
evolution of phases and microstructures in materials. Topics of interest
include, but are not limited to:
(a) General theory and computational methodology developments for understanding
and predicting the stability and evolution of phases and their microstructures
(b) Effect of atomic size mismatch on the thermodynamic stability of single and
multiphase systems
(c) Strain/stress effect on phase and domain structure stability of bulk
crystals and thin films
(d) Temperature-strain and temperature-strain-composition phase equilibria and
phase diagrams
(e) Coherent versus incoherent phase equilibria, phase diagrams, and
microstructures
(f) Phase and microstructure stability under external fields such as stress,
electric, or magnetic fields
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.
Materials processing involves inherently interlinked and complex chemical,
thermal, mechanical, and physical operations, spanning from the extraction of
raw materials to the shaping and heat treatment of final products. This
symposium is dedicated to improving the understanding of materials production
and process technology through multiple experimental and modeling techniques.
At TMS2025, this symposium will focus on first principle and applied studies of
thermodynamics and rate-governed phenomena, including reaction kinetics and
meso-, macro-scale transport of mass, momentum, and energy throughout the
sequence of processing operations. Studies that provide the necessary
framework for improved understanding of materials manufacturing unit operations
leading to optimized process designs and control are especially encouraged.
This symposium is cross-functional in nature and is open to all materials, such
as ferrous and nonferrous metals, composites and ceramics, and their relevant
synthesis and manufacturing techniques. Examples of subjects include, but are
not limited to:
• Thermodynamic modeling (i.e., CALPHAD-based methods) for the optimization of
alloy solutions, slag compositions, and other types of materials.
• Mass and energy balance simulations of material processing systems using of
software such as FactSage, MPE, HSC-SIM and METSIM.
• Both experimental and numerical studies on kinetic rate theories pertaining
to crucial material processes such as chemical reactions, diffusion, nucleation
and phase transformations, and solidification.
• Numerical modeling and simulation, such as computational fluid dynamics
(CFD), of multi-scale transport phenomena in unit operations.
• Development and application of process simulations that utilize a combination
of thermodynamic, kinetic and transport equations to simulate and/or control
individual unit operations and/or plants.
Materials processing abstracts on topics other than thermodynamics and rate
phenomena will also be considered for presentation.
Harnessing phase transformations is a highly effective method for engineering
desired microstructures in materials for diverse applications. This symposium
is part of an ongoing TMS series dedicated to phase transformations and
microstructural evolution in materials processing and service conditions. It
aims to unite experimental, theoretical, and computational experts to assess
current theories on phase transformations and microstructural evolution,
particularly in solid states.
The topics of choice for this year include, but are not limited to:
• Phase transformations in steels and other ferrous alloys, non-ferrous alloys
(such as Ni, Al, Ti, Cu, Zr, Nb, Mg based), ceramics, refractory alloys,
semiconductors, and other materials for both structural and functional
applications.
• Phase transformations and microstructural evolution in high-entropy alloys
(HEA).
• Phase transformations under far-from-equilibrium processing conditions or
complex thermal histories and mechanical stressing.
• Advanced defect engineering techniques assisted by phase transformations.
• Understanding transformation pathways and metastable microstructures during
thermo-mechanical processing.
• The application of data science, simulation tools, and advanced
characterization techniques (both in-situ and ex-situ) in understanding and
discovering transformation pathways and microstructure signatures during phase
transformations.
This symposium is being organized on the occasion of Professor Dipankar
Banerjee’s 70th birthday to celebrate his seminal contributions and profound
impact on the field of Titanium physical metallurgy. It brings together leading
experts from across the world working on various aspects of titanium alloys
many of whom are his close friends and collaborators. The scope of the
symposium broadly encompasses all aspects of titanium and titanium-based
intermetallics including innovative processing routes, advanced
characterization techniques, novel computational modelling approaches etc. The
symposium will have special emphasis on advanced electron microscopy for
assessing the structure-property-processing correlation within titanium-based
alloys and intermetallics, with sessions also dedicated to evaluating phase
transformation pathways and deformation mechanisms, domains which have
immensely benefitted from Professor Banerjee’s research contributions. These
will include phenomena operating across multiple orders of length scales
extending from atomic-level to ingot- scale, across a wide range of
temperatures and loading rates. Please note that participation to this
symposium is by invitation only.
Austenite Formation and Decomposition V (AF&D V) is the 5th international
meeting on the decomposition of austenite following seminal meetings in 1962,
1984, 2003, and 2011. The decomposition of austenite is one of the most
important solid-state phase transformations in structural metals since it
dramatically influences the relationship between the microstructure,
properties, and performance of steels. Topics of interest include experimental,
theoretical and computational aspects of thermodynamics and kinetics of
austenite and phase stability, advanced experimental characterization,
austenite decomposition to bainite, martensite, etc., rapid thermal processes,
thermomechanical processing, alloying element effects, multiphase
microstructures, and property evolution. A special topic of focus for AF&D V is
ultra-fast austenite formation.
This symposium focuses on the gap between theoretical and research level
materials development and larger scale production and reliability of alloys due
to impurities inherent to source materials, scrap material, recycled metals,
and atmospheric influences. This symposium will span scales from basic design
and characterization to commercial production, and we encourage participation
from both academia and industry.
Submissions of particular interest include:
- Characterization studies of relationships of impurities with materials
properties including corrosion, oxidation, tensile strength, and
thermal/electrical properties
- High throughput thermodynamic calculations for alloy design and screening
- Development of high recycled content alloys
- Improvement of impurity tolerance necessary for scale up of alloy production
- Development of impurity removal techniques to improve production or
processing techniques
From high efficiency turbines to heat exchangers to nuclear reactors, additive
manufacturing (AM) has captured the attention of design engineers seeking to
take advantage of intricate geometries unattainable by conventional materials
processing. Likewise, materials engineers have been enthusiastic about the
opportunities that AM presents for using alloys that cannot be processed by
conventional thermomechanical routes. Novel designs and the manufacturing
process present their own challenges. The non-uniform thermal history and
non-equilibrium conditions produced during many additive manufacturing
processes result in microstructural heterogeneity within a single build and
unexpected phases forming as compared to wrought or cast processes. Residual
porosity, anisotropic arrangements of defects, and surface roughness could
exacerbate degradation in extreme environments. The focus of this symposium is
to simultaneously highlight innovative solutions to engineering challenges that
have been unlocked by AM while illuminating the limitations of materials in
environments featuring complex interactions between chemical, mechanical, and
thermal loads. Of interest is comparison of the chemo-mechanical responses of
additively manufactured materials to those that have been conventionally
processed. The symposium aims to bring together both experimental and
computational work to elucidate the unique characteristics that AM-related
microstructural inhomogeneity imparts on materials performance under imposed
loads outside of the typically recommended ranges for conventional alloys of
related composition. Understanding and characterizing the microstructure, both
in the as-built and post-processed state, and how it translates to the
properties and performance of AM materials under extreme environments is
critical for widespread adoption of this technology.
Topics of interest include, but are not limited to experimental, computational,
or theoretical studies related to phase transformations and microstructural
evolution in additively manufactured materials exposed to or intended for
extreme environments such as high temperatures, high strain-rates, corrosive
agents, irradiation, hydrogen, etc.
Complex thermal conditions experienced by engineering components used in high
temperature structural and energy applications are caused by the combination of
thermal cycling, thermal transients and/or thermal gradients. The traditional
approach to study solid-state transformations was previously based on ex situ
characterization of isothermally treated or continuously cooled samples.
However, these studies may not be representative of thermal conditions
experienced by components under operating or processing environments.
This symposium invites experimental and computational studies that focus on
solid-state transformations and microstructure evolution during complex thermal
conditions of metallic systems. Topics include but are not limited to:
Microstructural evolution under/during -
• complex heat treatments during fusion based metal additive manufacturing and
welding,
• thermal cycling of aerospace and automobile parts,
• heat transfer from engines or moving parts,
• aerodynamic heating,
• thermal cycling and thermal gradients of solder interconnects used in
micro-electronic packages, and
• complex in reactor thermal conditions of nuclear reactor components.
Structural stability of aerospace and energy related materials, manufactured by
conventional and additive routes, is of great importance to avoid catastrophic
failures during operation. Understanding their thermo-mechanical response under
extreme pressure, temperature or corrosive conditions would immensely aid in
designing alloys, and thereby increasing their lifetimes. This symposium delves
into investigations,focused on using high throughput tools for accelerated
materials discovery and root cause analyses of fielded and new make parts.
The topics of interest to this symposium include, but are not limited to, the
following:
•ICME tools coupled with multi-scale experimentation to correlate processing
history to microstructural hierarchy and ensuing property response
•ML-based multi objective optimization models targeted towards more reliable
and predictive capabilities with realistic (usually small) experimental data
•High throughput experimental approaches for accelerated
material-microstructure-property optimizations to facilitate ML.
The focus is on structural high temperature and light-weight materials such as
refractory alloys, high entropy alloys, Ni- Co- based alloys, high strength
titanium alloys, maraging steels and ODS alloys.
This symposium will bring together experts in advanced theory, computation and
experimental characterization of microstructural evolution during solid-state
phase transformations and plastic deformation in complex multicomponent alloys.
The development of modern computational and experimental tools has led to
better fundamental insights into pathways and mechanisms of solid-state
transformations and deformation. The symposium will survey the current
state-of-the-art fundamental understanding of transformation and deformation
mechanisms and the intrinsic coupling between the two processes, leading to the
development of new alloy design principles and strategies. Since integration
between experiment and computation has become a hallmark in alloy
microstructure science and engineering, sessions will cover mechanism-based
modeling and simulations motivated and informed by experimental
characterization and novel alloy microstructure design and engineering guided
by computation. The specific topics will include but not be limited to: (1)
Phase transformation pathways and deformation mechanisms in complex
multicomponent alloy systems such as Ni-/Co-base superalloys, Ti-, Al- and
Mg-alloys, HEAs, and shape memory alloys; (2) Phase transformation and
deformation in compositionally and/or structurally modulated or graded
materials.
Presentations in this symposium are by invitation only.
Materials processing plays a key role in a wide variety of critical and
emerging technologies, including thin film processing, micro/nano
manufacturing, quantum technologies, and additive manufacturing. To go beyond
empirical process development and recipe optimization, a critical and in-depth
understanding of the processing science and underlying kinetic phenomena is
instrumental. This symposium aims to bring together a wealth of researchers and
leaders to discuss how materials processing science has been and is being
applied to address the pressing needs in thin film processing and micro/nano
manufacturing. It also aims to provide a platform to discuss how processing
science and kinetics can best benefit emerging fields, such as additive
manufacturing. Topics of interests include (i) kinetic phenomena at the
micro/nanoscale: e.g., dewetting and pattern formation; (ii) thin film
processing: stress/microstructure/phase evolution; (iii) processing science and
kinetic phenomena underlying advanced manufacturing; (iv) Integration of AI and
data-driven approaches with materials processing science.
Phase transformation is one of the most effective and efficient means to
produce desired microstructures in materials for various applications. This
symposium is a continuation of a series of annual TMS symposia focusing on
phase transformations and microstructural evolution during materials processing
or under service conditions. It intends to bring together experimental,
theoretical and computational experts to assess the current status of theories
of phase transformations and microstructure evolution primarily in the solid
states. In addition to fundamental understanding of the mechanisms underlying
phase transformations and microstructure evolution, attention will also be
given to microstructure engineering using emerging processing/manufacturing
techniques to fabricate advanced materials for both structural and functional
applications.
The topics of choice for this year include, but are not limited to:
1) Phase transformations in steels and ferrous alloys, non-ferrous alloys (such
as Ti, Ni, Al, Zr), ceramics, semiconductors and other materials for both
structural and functional applications;
2)Phase transformations and microstructure evolution in high-entropy alloys
(HEA)
3) Phase transformations under far-from-equilibrium processing conditions or
complex thermal histories;
4) Advanced defect engineering technique assisted by phase transformation;
5) Understanding transformation pathways and metastable microstructures in
solid phase processing of materials using shear deformation;
6) The application of data science, simulation tools, and advanced
characterization techniques (both in-situ and ex-situ) in understanding and
discovery of transformation pathway and microstructure signature along it
during phase transformations.
Structural stability of aerospace and energy related materials, manufactured by
conventional and additive routes, is of great importance to avoid catastrophic
failures during operation. Understanding their thermo-mechanical response under
extreme pressure, temperature or corrosive conditions would immensely aid in
designing alloys, and thereby increasing their lifetimes. This symposium delves
into investigations, focused on using high throughput tools for accelerated
materials discovery and root cause analyses of fielded and new make parts.
The topics of interest to this symposium include, but are not limited to, the
following:
•ICME tools coupled with multi-scale experimentation to correlate processing
history to microstructural hierarchy and ensuing property response
•ML-based multi objective optimization models targeted towards more reliable
predictive capabilities with realistic (usually small) experimental data
•High throughput experimental approaches for accelerated
material-microstructure-property optimizations to facilitate ML.
The focus is on structural high temperature and light-weight materials such as
refractory alloys, high entropy alloys, Ni- Co- based alloys, high strength
titanium alloys, maraging steels and ODS alloys.
As computational methodologies in the materials science and engineering become
more mature, it is critical to develop and validate numerical techniques and
algorithms that employ ever-expanding computational resources. The algorithms
for either physics-based models or data-based models can impact critical
materials science areas such as: data acquisition and analysis from microscopy,
atomic force microscopy (AFM), state-of-the-art light source facilities, and
analysis/extraction of quantitative metrics from numerical simulations of
materials behavior.
This symposium seeks abstract submissions for developing new algorithms and/or
designing new methods for performing computational research in materials
science and engineering. One symposium thrust is on implementation on the novel
peta/exascale supercomputer architectures for revolutionary improvements in
simulation analysis time, power, and capability. Another symposium thrust is
for employing widely available state-of-the art cloud and clusters computing
systems. Validation studies and uncertainty quantification of computational
methodologies are also of interest. Session topics include, but are not limited
to:
• Advancements that enhance modeling and simulation techniques such as density
functional theory, molecular dynamics, Monte Carlo simulation, dislocation
dynamics, electronic-excited states, phase-field modeling, CALPHAD, crystal
plasticity, and finite element analysis;
• Advancements in semi-empirical models and machine learning algorithms for
interatomic interactions, microstructure evolution and meso/continuum models;
• New techniques for physics-based, multi-scale, multi-physics materials
modeling;
• Computational methods for analyzing results and development of reduced
models from high fidelity simulations data of materials phenomena;
• Approaches for data mining, machine learning, image processing, image based
microstructure generation, synthetic microstructure generation, high throughput
databases, high throughput experiments, surrogate modeling and extracting
useful insights from large data sets of numerical and experimental results;
• Approaches for improving performance and/or scalability, particularly on new
and emerging hardware (e.g., GPUs), and other high-performance computing (HPC)
efforts; and
• Uncertainty quantification, statistical metrics from image-based synthetic
microstructure generation, model comparisons and validation studies related to
novel algorithms and/or methods in computational material science.
Engineering the microstructure and microstructural hierarchy form the basis of
the application of metallic materials. A spatial hierarchy ranging from
atomic/dislocation to precipitate to grain level can be effective at different
scales and help to design high-performing alloys. Deformation processing is
widely applied to engineer defect-mediated microstructures. High-stress
deformation processes such as high-pressure torsion or high strain processes
such as friction stir processing both have been used to modify defect
structures often resulting in the microstructural hierarchy. However, in these
processes, the mechanical-thermal coupling obscures a deep mechanistic
understanding of the microstructural evolution, and the knowledge of how these
microstructures influence properties is an active research area. This symposium
brings together the various communities working on deformation-induced
microstructural modification. Areas of interest include severe plastic
deformation, friction stir processing, cold spray, shear processing, grain
boundary engineering, persistent metastable structures by solid-phase
processing, the influence of deformation on precipitation, microstructural and
phase evolution under deformation, distribution of the alloying elements,
supersaturation, forced mixing, and the influence of these on the overall
microstructural evolution and mechanical properties of these alloys. Both
experimental and computational topics are welcome.
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
Phase transformation is one of the most effective and efficient means to
produce desired microstructures in materials for various applications. This
symposium is a continuation of a series of annual TMS symposia focusing on
phase transformations and microstructural evolution during materials processing
or under service conditions. It intends to bring together experimental,
theoretical and computational experts to assess the current status of theories
of phase transformations and microstructure evolution primarily in the solid
states. In addition to fundamental understanding of the mechanisms underlying
phase transformations and microstructure evolution, attention will also be
given to microstructure engineering using emerging processing/manufacturing
techniques to fabricate advanced materials for both structural and functional
applications.
The topics of choice for this year include, but are not limited to:
1) Phase transformations in steels and ferrous alloys, non-ferrous alloys (such
as Ti, Ni, Al, Zr), ceramics, semiconductors and other materials for both
structural and functional applications;
2)Phase transformations and microstructure evolution in high-entropy alloys
(HEA)
3) Phase transformations under far-from-equilibrium processing conditions or
complex thermal histories;
4) Advanced defect engineering technique assisted by phase transformation;
5) Understanding transformation pathways and metastable microstructures in
solid phase processing of materials using shear deformation;
6) The application of data science, simulation tools, and advanced
characterization techniques (both in-situ and ex-situ) in understanding and
discovery of transformation pathway and microstructure signature along it
during phase transformations.
The transient heat transfer conditions encountered in additive manufacturing
(AM) result in unusual microstructures and textures that can have different
properties from conventional wrought or cast processes. The unique
microstructure results from the combination of rapid melting and solidification
from the AM process. The directional heat transfer results in strongly textured
columnar grains, and this microstructure affects the mechanical properties of
the final part. Conventionally processed products have been considered superior
compared to AM in many of the most demanding and safety critical engineering
applications due to the heterogeneity and orientation dependency of mechanical
properties, potential for life-limiting defect content, and qualification
challenges. This limits adoption of AM parts where they could otherwise offer
an advantage, for example in weight savings or reduction in final machining.
Mechanical anisotropy results from the strong crystallographic texture in
as-fabricated AM parts, and this anisotropy can be influenced with an
optimization of the laser scanning strategy or a post fabrication heat
treatment. Because the initial microstructures from AM are different from
conventional processes, optimal heat treatment times and temperatures for AM
materials can differ from those used in conventional thermomechanical
processing. The lack of standardization between machines creates an additional
level of complexity. As a result, the qualification of materials from AM would
benefit from an accurate digital twin of the process, capable of predicting
defect probabilities and local microstructure heterogeneity. This symposium
will explore the unique thermal sequence of AM materials and their distinctive
microstructures, which affect their performance.
Contributions are sought that address microstructure development during AM from
experimental and computational perspectives, including but not limited to:
- quantitative microstructure characterization
- mechanisms of defect formation
- correlation of in-situ process monitoring data with microstructure
- defect probability predictions
- uncertainty quantification
- multiphysics simulations, both of the manufacturing process and the effects
of microstructure on performance.
References
[1] Seifi, M., et al. "Progress towards metal AM standardization to support
qualification and certification." JOM 69.3 (2017): 439-455.
[2] Kok, Y., et al. "Anisotropy and heterogeneity of microstructure and
mechanical properties in metal AM: A critical review." Materials & Design 139
(2018): 565-586.
[3] Lindgren, L.-E., and A. Lundb�ck. "Approaches in computational welding
mechanics applied to AM: Review and outlook." Comptes Rendus M�canique 346.11
(2018): 1033-1042.
[4] Gatsos, T., et al. "Review on computational modeling of process–
microstructure–property relationships in metal AM." JOM 72.1 (2020): 403-419.
[5] Rezaei, A., et al. "Microstructural and mechanical anisotropy of selective
laser melted IN718 superalloy at room and high temperatures using small punch
test." Materials Characterization 162 (2020): 110200.
Most intermetallic compounds adopt complex and aperiodic structure types,
hallmarked by their extremely large unit cells and extensive crystallographic
disorder. Quasicrystals are the quintessential example of crystal complexity:
they possess long-range positional order but classically forbidden
orientational order. Despite their frequent observation in both metallic
alloys and soft matter structures in the 40 years since their discovery, little
is known about the way in which they emerge from a liquid, amorphous, or
crystalline precursor.
While multiple kinetic models have been proposed, such models remain unverified
due to the prior lack of experimental and computational probes. We now have
suitable probes in hand. This symposium will integrate theory, state-of-the-art
characterization techniques, and multi-scale modelling approaches in order to
achieve a comprehensive picture of the formation and transformation pathways of
complex intermetallics. Topics include structure models; surfaces and
overlayers; growth and stability; defect generation; and soft matter analogues.
As computational methodologies in the materials science and engineering become
more mature, it is critical to develop, improve, and validate techniques and
algorithms that leverage ever-expanding computational resources. These
physical-based and data-intensive algorithms can impact areas such as: data
acquisition and analysis from sophisticated microscopes and state-of-the-art
light source facilities, analysis and extraction of quantitative metrics from
numerical simulations of materials behavior, and implementation on novel peta-
and exascale computer architectures for revolutionary improvements in
simulation analysis time, power, and capability.
This symposium solicits abstract submissions from researchers who are
developing new algorithms and/or designing new methods for performing
computational research in materials science and engineering. Validation studies
and uncertainty quantification of computational methodologies are equally of
interest. Session topics include, but are not limited to:
• Advancements that enhance modeling and simulation techniques such as density
functional theory, molecular dynamics, Monte Carlo simulation, dislocation
dynamics, electronic-excited states, phase-field modeling, CALPHAD, and finite
element analysis;
• Advancements in semi-empirical models and machine learning algorithms for
interatomic interactions;
• New techniques for simulating the complex behavior of materials at different
length and time scales;
• Computational methods for analyzing results from simulations of materials
phenomena;
• Approaches for data mining, machine learning, image processing, high
throughput databases, high throughput experiments, and extracting useful
insights from large data sets of numerical and experimental results;
• Approaches for improving performance and/or scalability, particularly on new
and emerging hardware (e.g. GPUs), and other high-performance computing (HPC)
efforts; and
• Uncertainty quantification, model comparisons and validation studies related
to novel algorithms and/or methods in computational material science.
The interfacial regions separating different grains in polycrystalline
materials, while occupying only a small fraction of total volume, largely
control the system’s properties, including mechanics, mass/heat transfer,
radiation resistance, etc. The misorientation angle has been widely used to
describe the structures of grain boundaries (GBs), but only a few types of GBs
(i.e., ones with low energy and some special “coincidence number” Σ) are well
understood at the current stage. In reality, given the large variety of
possible metastable states, the higher disorder levels at interfaces, and their
different responses to external stimuli, global equilibrium is rarely achieved
in GBs of poly- or nano-crystalline materials. The large scale of
non-equilibrium metastable states and the thermodynamics and kinetics therein
play decisive roles in determining GB properties and their microstructural
evolution.
This symposium aims to accelerate the development of new concepts and
methodologies to effectively describe GBs. The role of disorder at interfaces,
the broad distributions of energies and activation barriers, and their
interplay with complex or extreme environments will be subjects of particular
focus. Both theoretical (including modeling and simulation) and experimental
studies are encouraged. The topics of interest to this symposium include, but
are not limited to, the following:
• Energetics and activation barriers spectra in materials with high level of
disorder (e.g., grain boundaries, amorphous states, etc.)
• Non-equilibrium thermodynamics and metastability of grain boundaries
• Novel experimental, theoretical, and data-driven techniques for
microstructural characterization of interfaces
• Relationships between structure (atomic or crystallographic) and grain
boundary properties
• Interactions between interfaces and extrinsic defects (e.g., dislocations,
point defects, impurities, etc.) and their mechanical consequences
• Grain boundary kinetics and phase transformations at different external
stimuli (e.g., mechanical loading, irradiation, thermal cycling, etc.)
• Interfaces beyond grain boundaries, such as crystalline-amorphous interfaces
in hierarchical structures, precipitate-matrix interfaces in multi-element
alloys, etc.
The microstructural templates based on a homogeneous distribution of ordered
precipitates (for example L12, DO22, or B2) within a solid solution
face-centered cubic (FCC) or body-centered cubic (BCC) matrix, are two of the
most prevalent templates used in designing multiple alloy systems. Such systems
include nickel-base and cobalt-base superalloys, austenitic and ferritic
steels, aluminum-base alloys, and more recently high entropy alloys, or complex
concentrated alloys. The ordered precipitates in these alloys can be potent
strengtheners, both at ambient and at elevated temperatures. This symposium
brings together the various communities working on isostructural
ordered/disordered precipitate/matrix alloy systems. Areas of interest include:
the mechanism of precipitation of the ordered phase within the FCC or BCC solid
solution matrix, distribution of the alloying elements between matrix and
precipitate, other related phase transformations, and the influence of these on
the overall microstructural evolution and mechanical properties of these
alloys. Both experimental and computational work on these topics are welcome.
Phase transformation is one of the most effective and efficient means to
produce desired microstructures in materials for various applications. This
symposium is a continuation of a series of annual TMS symposia focusing on
phase transformations and microstructural evolution during materials processing
or under service conditions. It intends to bring together experimental,
theoretical and computational experts to assess the current status of theories
of phase transformations and microstructure evolution primarily in the solid
states. In addition to fundamental understanding of the mechanisms underlying
phase transformations and microstructure evolution, attention will also be
given to microstructure engineering using emerging processing/manufacturing
techniques to fabricate advanced materials for both structural and functional
applications.
The topics of choice for this year include, but are not limited to:
Phase transformations in steels and ferrous alloys, non-ferrous alloys (such
as Ti, Ni, Al, Zr), ceramics, semiconductors and other materials for both
structural and functional applications;
Phase transformations and microstructure evolution in high-entropy alloys
(HEA)
Phase transformations under far-from-equilibrium processing conditions or
complex thermal histories;
Advanced defect engineering technique assisted by phase transformation;
Understanding transformation pathways and metastable microstructures in solid
phase processing of materials using shear deformation;
The application of data science, simulation tools, and advanced
characterization techniques (both in-situ and ex-situ) in understanding and
discovery of transformation pathway and microstructure signature along it
during phase transformations.
The growing field of Additive Manufacturing (AM) provides new exciting
challenges and opportunities in physical metallurgy. Inherently different to
traditional manufacturing processes, in AM, metallic systems undergo various
localised phase transformations in fractions of a second during a build. For
instance, the layer-by-layer approach gives rise to the so-called intrinsic
heat treatment, where earlier layers continuously experience a temperature
gradient induced by the melting of subsequent layers. This often results in an
inhomogeneous microstructure throughout the build, and in some cases,
precipitation can be triggered from early stages. Therefore, there is a need
for AM-tailored post-processing conditions.
For a wider adoption of the technology in industry, the knowledge on the
microstructure needs to be extended to its stability in service, including high
load and temperature conditions. Such understanding will provide a solid
background in the design of microstructures tailored for the AM process, and
bring us a step closer in establishing the materials paradigm for AM.
Topic of interest include, but are not limited to:
* Microstructural characterisation of AM-processed materials throughout
post-processing.
* Physical modelling / simulation of phase transformations and microstructural
evolution.
* Phase transformations and microstructural stability of AM components under
extreme conditions.
* Effects of powder manufacturing process and recycling on phase stability.
* Processing effects on as-built microstructure gradients and texture.
As computational approaches to study the science and engineering of materials
become more mature, it is critical to develop, improve, and validate techniques
and algorithms that leverage ever-expanding computational resources. These
algorithms can impact areas such as: data acquisition and analysis from
sophisticated microscopes and state-of-the-art light source facilities,
analysis and extraction of quantitative metrics from numerical simulations of
materials behavior, and the ability to leverage specific computer architectures
for revolutionary improvements in simulation analysis time, power, and
capability.
This symposium solicits abstract submissions from researchers who are
developing new algorithms and/or designing new methods for performing
computational research in materials science and engineering. Validation studies
and uncertainty quantification of computational methodologies are equally of
interest. Session topics include, but are not limited to:
- Advancements that enhance modeling and simulation techniques such as density
functional theory, molecular dynamics, Monte Carlo simulation, dislocation
dynamics, electronic-excited states, phase-field modeling, CALPHAD, and finite
element analysis;
- Advancements in semi-empirical models and machine learning algorithms for
interatomic interactions;
- New techniques for simulating the complex behavior of materials at different
length and time scales;
- Computational methods for analyzing results from simulations of materials
phenomena;
- Approaches for data mining, machine learning, image processing, high
throughput databases, high throughput experiments, and extracting useful
insights from large data sets of numerical and experimental results;
- Uncertainty quantification, model comparisons and validation studies related
to novel algorithms and/or methods in computational material science.
Continuous phase transformations in the solid state are not limited by
nucleation barriers, can give rise to complex microstructural configurations
and provide opportunities to achieve a sweeping range materials properties if
properly controlled. The potential impact of such transformations now
encompasses a much broader range of applications and is no longer limited to
fundamental studies or very limited alloy classes. For example, short range
ordering phenomenon in so called high entropy alloys are providing new insight
on localized mechanical deformation behavior, while second order
transformations are also central to the development of next generation steels,
magnets, energy storage materials, etc. In addition to fundamental
understanding of the mechanism underlying continuous phase transformations,
attention will also be given to utilization of these unique transformation
pathways to develop novel microstructures for advanced structural and
functional materials.
This symposium aims to provide a forum for discussion of current research
efforts aspiring to understand, control and predict the pathways and
consequences of continuous phase transformations, which may arise through
conventional or emerging processing routes, through state-of-the-art
characterization tools (such as in-situ transmission electron microscopy,
aberration-corrected scanning/transmission electron microscopy and atom probe
tomography) and computational tools (including DFT, MD, CALPHAD, Phase-Field
and Machine Learning).
Solid–solid phase transformation during thermo-mechanical processing (TMP) is
still one of the most effective and efficient means to produce desired
microstructures for structural (including orthopedic implant) and functional
materials including steels, light metals (e.g. titanium, magnesium and aluminum
alloys) and shape memory alloys, to name a few. On the one hand, extended
defects such as dislocations and internal interfaces (e.g., stacking faults,
grain boundaries and triple junctions, hetero-phase interfaces) have been
frequently utilized to direct nucleation and tune the number density, size,
shape, orientation and spatial distribution of desired phases and thus
mechanical properties. On the other hand, crystalline defects of a specific
characteristic (s) generated during TMP could be desired for improving
materials properties as well (e.g., grain boundaries with low-index plane
demonstrate strong resistance to crack propagation and corrosion in harsh
service environment)
The symposium aims at providing a forum for discussion of current research
efforts that bring together state-of-the-art characterization tools (such as
in-situ transmission electron microscopy, aberration-corrected
scanning/transmission electron microscopy and atom probe tomography) and
computational tools (including DFT, MD, Phase-Field and Machine Learning) for
fundamental understanding of defect-microstructure interactions and the
corresponding defect engineering strategies to design new microstructures, both
homogeneous and heterogeneous / hierarchical for unprecedented properties.
The eighth “Frontiers in Solidification" symposium will provide a forum to
present and discuss the latest advances in the field of Solidification Science.
The main focus will be on the fundamental aspects of solidification, with the
aim of advancing our understanding of how microstructures develop and evolve
during solidification experiments or processes. Beyond solidification,
contributions that investigate melting phenomena are also encouraged. The
widest range of investigation methods are considered, including theory,
experiments, characterization, modeling across all relevant length and time
scales, as well as data-driven approaches. Contributions will put forward
original interpretations, observations of novel phenomena, and/or outstanding
challenges from both fundamental and applied perspectives, as well as transfer
of fundamental knowledge to practical applications. Contributions that combine
novel characterization techniques, challenging property measurements, and
computational simulations across scales are especially encouraged.
Topics of interest include:
• Nucleation
• Growth
• Melting
• Interfaces and boundaries (solid-liquid, solid-solid, stability,
anisotropy, kinetics,...)
• Pattern formation (cellular, dendritic, eutectic, peritectic,...)
• Fluid flow and gravity effect on microstructure formation and evolution
• Segregation and defects
• In-situ and time-resolved imaging of microstructures
• Theory and modeling across all relevant length scales
• Emerging processing techniques (e.g. additive manufacturing)
• Data-driven methods in solidification science
Phase transformation is still one of the most effective and efficient means to
produce desired microstructures in materials for various applications. This
symposium is a continuation of a series of annual TMS symposia focusing on
phase transformations and microstructural evolution during materials processing
or under service conditions. It intends to bring together experimental,
theoretical and computational experts to assess the current status of theories
of phase transformations and microstructure evolution primarily in the solid
states. In addition to fundamental understanding of the mechanisms underlying
phase transformations and microstructure evolution, attention will also be
given to microstructure engineering using emerging processing/manufacturing
techniques to fabricate advanced materials for both structural and functional
applications.
The topics of choice for this year include, but are not limited to:
1. Phase transformations in steels and ferrous alloys, non-ferrous alloys (such
as Ti, Ni, Al, Zr), ceramics, semiconductors and other materials for both
structural and functional applications;
2. Phase transformations and microstructure evolution in high-entropy alloys
(HEA);
3. Phase transformations under far-from-equilibrium processing conditions or
complex thermal histories;
4. Advanced defect engineering technique assisted by phase transformation;
5. Understanding transformation pathways and metastable microstructures in
solid phase processing of materials using shear deformation;
6. The application of data science and advanced characterization techniques
(both in-situ and ex-situ) in understanding and discovery of transformation
pathway and microstructure signature along it during phase transformations
As the metal Additive Manufacturing (AM) technology evolves and becomes a
viable option for actual component production, a better understanding of the
fundamentals and particularities associated with phase transformations
involving both, liquid and solid, during the printing process, post-processing
and service of additive manufactured materials becomes extremely important. The
differentiated microstructures associated with AM and their relationship with
the materials and components performance can only be fully understood, modeled
and engineered if the phase transformations that have been involved on their
formation and evolution are adequately understood. Therefore, this symposium
will bring together both the phase transformations and additive manufacturing
communities to address fundamental and applied aspects of phase transformations
on additive manufactured materials. The topics of interest include, but are not
limited to:
• Solidification and liquation phenomena, including the resultant chemical
segregation;
• Solid state transformations during the printing, post-processing and service
of metallic materials;
• Effects of segregation profiles, impurities content and distribution,
crystallographic texture, and residual stresses on liquid-solid and solid-solid
phase transformations;
• Relationships between phase transformations and defect formation during
additive manufacturing and the use of fundamental understanding to propose
engineering solutions;
• Modeling and simulation of phase transformations associated to AM and AM
materials;
• Interdependence of thermo-mechanical conditions and phase transformations on
the microstructural evolution and final materials performance;
• The use of conventional and advance phase transformation models on the design
and optimization of alloys better suited for different AM processes.
As computational approaches to study the science and engineering of materials
become more mature, it is critical to develop, improve, and validate techniques
and algorithms that leverage ever-expanding computational resources. These
algorithms can impact areas such as: data acquisition and analysis from
sophisticated microscopes and state-of-the-art light source facilities,
analysis and extraction of quantitative metrics from numerical simulations of
materials behavior, and the ability to leverage specific computer architectures
for revolutionary improvements in simulation analysis time, power, and
capability.
This symposium solicits abstract submissions from researchers who are
developing new algorithms and/or designing new methods for performing
computational research in materials science and engineering. Validation studies
and uncertainty quantification of computational methodologies are equally of
interest. Session topics include, but are not limited to:
- Advancements that enhance modeling and simulation techniques such as density
functional theory, molecular dynamics, Monte Carlo simulation, dislocation
dynamics, electronic-excited states, phase-field modeling, CALPHAD, and finite
element analysis;
- Advancements in semi-empirical models and machine learning algorithms for
interatomic interactions;
- New techniques for simulating the complex behavior of materials at different
length and time scales;
- Computational methods for analyzing results from simulations of materials
phenomena;
- Approaches for data mining, machine learning, image processing, high
throughput databases, high throughput experiments, and extracting useful
insights from large data sets of numerical and experimental results;
- Uncertainty quantification, model comparisons and validation studies related
to novel algorithms and/or methods in computational material science.
Atom probe tomography (APT), is an emergent characterization technique that is
capable of determining the chemical identity of each individual atom and
generating 3D chemical maps imaging the distribution of individual atoms. The
technique offers high spatial resolution (better than 0.3 nm achievable in all
directions) and high analytical sensitivity (as good as 7 appm). APT provides
information on elemental composition of the specimen, 3D visualization of
distribution of atoms, composition of phases, morphology and size of
precipitates, and solute distribution across interfaces, at grain boundaries
and along dislocations. In many APT analyses, crystallographic information has
been retained within the data, with the potential to directly relate the
composition of specific microstructural features to their crystallography with
unprecedented sensitivity and resolution. APT can be utilized in many different
fields for advanced imaging and analysis of metals, minerals and materials,
despite some limitations.
This symposium is designed to bring together scientists, engineers and
technicians from across disciplines to discuss the technique of APT, its
applications and limitations. The symposium will encompass research and
applications spanning a wide variety of topics. Presentations on experimental,
theoretical, and modeling research are solicited. Topics for this symposium
include, but are not limited to:
Applications of APT in advanced characterization of metals, minerals and
materials
3D reconstruction and data analysis
Impact of specimen and instrument parameters and optimization of acquisition
conditions
Specimen preparation techniques
Limitations of APT
Progress in APT technique
Correlative techniques
Modelling and simulation
The demand for materials meeting higher requirements has driven the development
of novel alloys over the past decades. Some of the examples include metastable
austenite in TRIP, TWIP and Q&P steels, beta-stabilised titanium alloys, gamma
double prime precipitates in nickel superalloys, high entropy
alloys,quasicrystals, and spinodal decomposition during ageing of aluminium
alloys. The foundation of all these technological leaps is in the design and
control of metastable phases, where, outstanding properties are achieved
through a combination of carefully tailored chemical composition and thermal
processing.
The symposium aims at providing a forum for discussion towards designing the
next generation of alloys.
The microstructural template based on a homogeneous distribution of ordered
precipitates (such as L12 or DO22) within a face-centered cubic (FCC) matrix,
is one of the most prevalent templates used in multiple alloy systems including
nickel-base and cobalt-base superalloys, austenitic steels, aluminum-base
alloys, and more recently in high entropy alloys, or complex concentrated
alloys. These ordered precipitates have been established to be potent
strengtheners, both at room and at elevated temperatures, in case of these
alloy systems. The present symposium is an attempt to bring together the
different communities working on these alloy systems under one umbrella. The
areas of interest include, the mechanism of precipitation of the ordered phase
within the FCC solid solution matrix, distribution of the alloying elements
between matrix and precipitate, other related phase transformations, and the
influence of these on the overall microstructural evolution and mechanical
properties of these alloys. Both experimental and computational work on these
topics are welcome. We strongly encourage researchers working in this field,
but often on different alloy systems, to participate in this unique symposium.
Phase transformation is still one of the most effective and efficient means to
produce desired microstructures in materials for various applications. This
symposium is a continuation in a series of annual TMS symposia focusing on
phase transformations and microstructural evolution in materials during
processing and in service. It intends to bring together experimental,
theoretical and computational experts to assess the current status of theories
of phase transformations and microstructure evolution primarily in the solid
states. In addition to fundamental understanding of the mechanisms underlying
phase transformations and microstructure evolution; attention will also be
given to the utilization of unique transformation pathways to develop novel
microstructures for advanced structural and functional materials.
The topics of choice for this year include, but are not limited to:
- Phase transformations in steels and ferrous alloys, non-ferrous alloys,
ceramics, and other materials
- Phase transformations under far-from-equilibrium-condition processing or
complex thermal histories
- Control phase transitions via defect engineering
- Materials defects induced by phase transformation
- Computation, data science and experimentation in the understanding of phase
transformations