This symposium is the thirteenth friction stir welding and processing symposium
during TMS Annual Meetings. This symposium will present fundamentals and the
current status of friction stir welding (FSW) and solid-state friction stir
processing of materials. It will provide researchers and engineers with an
opportunity to review the current status of the friction stir related processes
and discuss the future possibilities. Papers are sought on all aspects of
friction stir welding and processing including their various derivative
technologies.
Abstracts are requested in the following general topic areas related to
friction stir technologies: additive friction stir technologies, friction stir
extrusion technologies; high temperature applications, industrial applications,
friction stir spot technologies, dissimilar alloys and/or materials,
lightweight alloys, simulation, characterization, and non-destructive
examination techniques.
This symposium aims to bring together researchers and engineers from both
academia and industry to discuss and share ideas and current advances in the
field of light alloys. The symposium will have a focus on but not be limited to
advances in light alloys such as high recycled content aluminiums, advanced
forming processes for use with high strength light alloys for the purpose of
producing automotive lightweight structures and new characterization
techniques.
Papers and talks that describe studies and current advances on the following
topics are invited:
Development of new light alloys in particular aluminium, magnesium, and alloys
with high recycled content.
Advanced elevated temperature forming processes such as SPF, QPF, HQF in
relation to light alloys.
Microstructural studies to understand evolution during forming and the
relevance within industrial processes.
Related processes such as tribological studies, joining and sustainability.
Also welcome are all aspects of research, development and applications relating
to light alloys.
This symposium will consider shaping and forming challenges that have arisen
out of changes in vehicle design due to electrification. As the automotive
industry continues to evolve, developments in manufacturing processes must keep
pace to meet governmental mandates. Previous developments focused primarily on
replacing heritage manufacturing processes with newer approaches that reduced
costs, increased production volume, or incorporated new materials for improved
light-weighting. Throughout these developments, the overall design and
fabrication of components integrated into the body-in-white remained largely in
place. As e-vehicles become increasingly mandated, however, automotive
manufactures are responding with significant changes to the vehicle design in
order to integrate the batteries and battery trays while also addressing their
associated safety, weight, and cooling concerns. With the tray becoming an
integral part of the load carrying capacity like in the case of structural
battery pack, new shaping and forming processes are required to handle the new
designs, materials, and constraints. One example is the skateboard chassis
configuration, which requires alternative materials and manufacturing processes
but allows automakers to design several vehicle categories around the same
framework, thus reducing time and cost. Topics welcome within this symposium
include shaping, forming or solid-state joining processes that will propel the
fabrication of e-vehicles from low production to high production in upcoming
years, notably those related to the production of the battery tray or
structural elements.
With the dawn of the electric vehicles (EV) and more stringent emission
requirements, lightweighting of automotive vehicles has become more critical.
However, expensive battery systems and vehicle electronics are putting pressure
on the cost of weight savings. Newer generations of ultra-high strength steels
(UHSS, UTS > 1000 MPa) and high-strength aluminum alloys (HSAA, UTS > 300 MPa)
are becoming available to provide weight savings at minimal or no cost. They
are also recyclable and have a lower carbon footprint compared to the other
lightweight material alternatives, further supporting their contribution to
sustainable and lower emission transportation. With the increasing strength,
formability and springback are becoming pressing issues for component
fabrication. Dimensional control and stability of the stamped part become
challenging with the higher springback. In addition, lower local formability
and fracture result in cracking and failure near edges, flanges, holes, and
bent corners. This gathering aims to provide a venue to present, discuss and
share solutions and challenges associated with addressing fracture and spring
back issues in various UHSS and HSAA sheet-forming processes.
Areas of topics include, but are not limited to:
- Local thermo-mechanical and/or heating techniques to improve formability and
reduce springback
- Incremental forming techniques, including roll forming, to control the stress
state and improve fracture limits
- Local or global alloying methods to improve formability
- Global thermo-mechanical processing in combination with aging/tempering
treatment to deliver the high strength with desired formability
- Formability near sheared edges
- Stamping in-line process control and AI/ML techniques to minimize the forming
defects
- Friction control in stamping/forming processes
- Flexible forming methods and digitized dies to enable tight bend radii and
complex shapes without failure during forming
- Warm and hot forming.
The primary production of metals and alloys and their downstream processing are
significant sources of anthropogenic CO2 emissions. With projected growth in
demand for metals and alloys in the future, there is a dire need now to develop
fundamental science-based approaches to decarbonize metal production and
processing. This symposium will bring together worldwide researchers working on
the basic science questions related to transitioning from the widely used
carbon-based high-temperature reduction of metal ores to lower-temperature
solid phase reduction processes using alternate reductants such as Hydrogen,
which can eliminate up to 10% of global CO2 emissions. This symposium will also
feature experimental and computational research efforts to develop
deformation-based solid phase processing approaches to achieve unique
microstructures with superior structural and functional properties in metals
and alloys.
Ultrafine-grained and heterostructured (UFGH) materials have been drawing great
attention from the materials research community because of their superior
mechanical and functional properties. In practice, heterostructures involving
an architecture microstructure, such as coarse-grained colonies dispersed in
fine-grained matrix, multi-length scale twins packed in predetermined fashion,
impregnation of transformational phases into non-transformational phases, etc.,
can produce outstanding combinations of mechanical properties that are not
accessible to materials having homogeneous microstructure. Formation of
heterostructures enables a new perspective to further enhance the properties of
UFG materials produced by severe plastic deformation and other processing
methods. Heterostructured materials can be produced using industrial facilities
for large-scale production at low cost. A continuous effort has been made in
the research field dealing with processing of UFGH materials and a significant
number of studies have been conducted to understand the underlying mechanisms
that control the mechanical behaviors of such materials. This symposium focuses
on all aspects of the science and technology of UFG and heterostructured
materials and covers a broad scope, ranging from fundamental science to their
industrial applications.
Specific topics include, but are not limited to:
• Fundamental issues in processing of UFGH materials including, but not limited
to, medium to severe plastic deformation techniques
• Deformation mechanisms of UFGH materials
• Novel UFG and heterostructures
• Mechanical and physical properties of UFGH materials
• Performance of UFGH materials in extreme environments (irradiation,
thermomechanical, corrosion, etc.)
• Multiscale modeling of deformation and fracture of UFGH materials
• Emerging processing methods for UFGH materials, such as powder processing and
rapid-solidification, mechanical and/or thermal processing
• Novel techniques to characterize the behaviors and properties of UFGH
materials
This symposium will provide a platform for researchers working on the
state-of-the-art of multiscale modeling of materials, microstructural
characterization, and small-scale mechanical testing to understand the
mechanical behavior of crystalline metals.
Background and Rationale: The mechanical behavior of crystalline metals
strongly depends on microstructure and the evolution of microstructure at
different length scales. Examples include changes in crystallography, defect
content and distribution, grain morphology, interfaces, and texture. The
success behind the development of multiscale predictive model relies on finding
and exploiting the synergies between modeling and experiments. In recent years
intense efforts have been dedicated to advancing atomistic, micro, meso and
macro-scale simulations tools and bridging them to understand the
structure-property relationship. Achieving this goal requires a strong
connection between models and experimental characterization techniques at
different length scales. This symposium aims to encourage
scientists/researchers from diverse areas of materials science and engineering
to present recent achievements, identify challenges in developing multiscale
material models from the atomic scale to the macro scale, and discuss
connections with advanced experimental techniques.
The subject areas of the symposium include, but are not limited to:
1. Structural, functional and nuclear materials
2. Dislocations, deformation twins, phase transformation and recrystallization
3. Atomistic modeling
4. Dislocation dynamics and phase field modeling
5. Crystal plasticity models
6. Advanced X-ray and neutron diffraction techniques
7. Advanced microscopy techniques including HR-(S)TEM, HR-EBSD, PED and in-situ
TEM and SEM
8. Emphasis on integrating experiments with modeling for guidance/validation
9. Experimentally aided Multi-scale Material Modeling
The Bladesmithing 2023 symposium will take the form of a traditional symposium
with technical presentations focusing on bladesmithing processes and
procedures. This symposium provides an opportunity to present their work
associated with, or inspired by, the 2017, 2019 and 2022 Bladesmithing
competitions as well as for new entries from students, student teams, and
seasoned bladesmithing TMS members. Participants may use any starting material,
from commercial stock material to material smelted from ore. Students and
student teams are required to have a faculty sponsor and are expected to
observe all of their campus’ applicable policies. All work must be performed
safely with elements of those safety procedures apparent in the presentation.
Final presentations should provide information on the justification for choice
of blade, any historical relevance, materials characterization, mechanical and
thermal treatments, processing of ore, etc.
Presentations will take the form of conventional talks, although posters may be
invited if the number of entries exceeds session capacity. Actual blades are
not to be brought to the conference, but safe metallurgical samples are allowed
and encouraged. Abstracts can be brief (at a minimum it must include a title,
university, name(s) of team members, and blade material) and should be
submitted by October 14, 2022.
A brief abstract explaining the historical background, blade material,
processing steps involved and characterization performed on the blades should
be included.
NOTE: The following information is required to complete this submission:
1. A title
2. An abstract and supporting information, including:
- A brief abstract (maximum abstract length 150 words)
- Name & email of the primary contact person (not a faculty advisor)
- Names of other team members, if known
- University affiliation
The symposium aims to bring about an intensive exchange of fundamental
understanding and technological advances of automotive lightweight structure
joining solutions, among worldwide academics, research scientists and expert
automotive engineers, with focus on aluminum alloys and their joints with steel
and polymers.Papers that describe physical experiments, joint design,
characterization and assessment, and process simulation and optimization on the
following key joining technologies are welcome:
• Solid state joining methods - self-piercing riveting (SPR), laser brazing,
ultrasonic spot welding and magnetic pulse welding (MPW), etc.
• Fusion welding and resistance welding- laser beam welding (LBW), electron
beam welding (EBW), Cold metal transfer (CMT) welding, resistance spot welding,
etc.
• Hybrid joining methods and adhesive bonding.
Also welcome are all aspects of research, development and applications relating
to the joining of automotive lightweight structures
s will be covered.
Mechanical deformation can be used to modify the microstructure of metallic
alloys to achieve supersaturation of solutes, nanoscale precipitate morphology
and novel phase equilibria, all of which in turn can be leveraged to achieve
improved mechanical properties. Deformation of materials also leads to the
generation of many defects ranging from vacancies, dislocations, stacking
faults, sub-grain boundaries, new grain boundaries, and voids. For developing
better predictive models of microstructural evolution during such deformation
processing, it is critical to understand how all these varieties of deformation
induced defects can then influence the diffusion of atoms during the processing
and then ultimately dictate the microstructural evolution. Therefore, this
symposium will bring together both experimental researchers using in operando,
in situ and ex situ characterizations including advanced microscopy and
synchrotron-based X-ray methods as well as computational researchers developing
new computational approaches to better predict the multiscale microstructural
evolution at medium to large strains. Studies of microstructural evolution
during traditional severe plastic deformation methods, friction stir
processing/welding methods, cold spray, and other deformation processing
methods are also of interest.
This symposium is the twelfth friction stir welding and processing symposium
during TMS Annual Meetings. This symposium will present fundamentals and the
current status of friction stir welding (FSW) and solid-state friction stir
processing of materials. It will provide researchers and engineers with an
opportunity to review the current status of the friction stir related processes
and discuss the future possibilities. Papers are sought on all aspects of
friction stir welding and processing including their various derivative
technologies.
Abstracts are requested in the following general topic areas related to
friction stir technologies: derivative technologies; high temperature
applications, industrial applications, dissimilar alloys and/or materials,
lightweight alloys, simulation, characterization, and non-destructive
examination techniques.
This is the fifth international symposium that focuses on the fundamental
science and technology of Heterostructured and Gradient Materials (HGMs). These
include, but are not limited to, heterostructured lamella materials, gradient
materials, layered materials, dual-phase materials, harmonic (core-shell)
materials, heterostructured composites, etc. HGMs are characterized by large
differences (100%) in mechanical behaviors and properties among
heterostructured zones. The large mechanical incompatibility leads to strong
inter-zone interactive coupling. This produces back stresses in the soft zones
and forward stresses in the hard ones, which collectively produce
hetero-deformation induced (HDI) strengthening. This distribution enhances the
yield strength and produces extra strain hardening above conventional
dislocation hardening, promoting ductile behavior. This unique deformation
behavior is reported to produce a superior combination of high strength and
high ductility that is not achievable with either nanostructured or
coarse-grained homogeneous materials.
HGMs represent an emerging class of materials that are expected to become a
major field of scientific exploration for the materials, mechanics and physics
communities in the coming years. The HGM strategy is not only capable of
producing structural materials with unprecedented mechanical properties, but is
also effective for developing multifunctional materials. Innovative top-down or
bottom-up approaches and material architectures, some of which may be
bio-inspired, need to be explored and developed to produce HGMs with superior
or disruptive properties. Many fundamental issues still need to be studied by
experimentation, analytical modelling, and numerical simulations. Particularly,
interface engineering and key interface-related phenomena, such as dispersive
strain bands, strain gradients, geometrically necessary dislocations and their
interactions with zone boundaries, as well as the emergence and evolution of
internal stresses, need to be addressed. This symposium, and the future
biannual symposia to follow, will be a forum for bringing together a diverse
group of multidisciplinary researchers to exchange ideas, discuss key issues,
and promote industrial technology development for commercial production and
applications.
Engineering sheet metals are customarily characterized by simple mechanical
tests to meet mechanical properties given in OEM specifications. A set of
uniaxial tension tests suffice to provide various standardized properties.
However, when OEMs stamp a blank sheet to shape their final products, the
materials experience quite complicated histories of straining paths that may
significantly differ from behavior that is characterized by conventional
mechanical tests. The advanced constitutive models of today require material
parameters obtained under multiaxial and complex loading conditions. Over the
past decades, the sheet metal forming community has observed that such advanced
constitutive models improve the predictive accuracy on formability and
springback. However, to successfully train the models, unconventional
experimental methods are often required. Here a list of notable experimental
methods is given: 1) the cruciform test was designed to strain sheet metals in
various stress ratios; 2) The tension-compression test was designed to provide
a deformation history representing the bending and unbending of sheets during
stamping; 3) The hydraulic bulge test is a widely spread method to obtain
hardening curves to large levels of plastic strain, which standard uniaxial
tests cannot provide; 4) Combination of non-coaxial loadings can provide
various stress states, to which the phase transition is sensitive; 5) An
experimental setup consisting of multiple steps with various pre-straining is
also practiced in order to observe constitutive behaviors under complex
histories of deformation that may occur in typical industrial stamping
processes; 6) High speed tests can subject the materials to a rate of speed
similar to what is actually observed during the stamping process.
The objective of this symposium is to explore numerous advances in experimental
testing and computational methods used for material characterization,
constitutive modeling, and analyses pertaining to sheet metal deformation in
multiple directions along multiple axes or with changing strain path
conditions. Abstracts are encouraged on research of material behavior related
to microstructure based on multiple directional deformation including but not
limited to:
• Improvements and new methods of mechanical property measurement.
• Characterization of phase transformations and deformation mechanisms in
multiphase microstructures during forming.
• Theory and modeling related to the mechanical properties.
• Deformation simulations, forming processes, friction and springback.
• Multi-directional mechanical testing and advanced strain/stress measurements.
• Integration of scientific knowledge with manufacturing practices.
• Development of accurate constitutive relationships.
Ultrafine-grained and heterostructured materials have been drawing great
attention from the materials research community because of their superior
mechanical and functional properties. Heterostructures with UFG zones as the
primary microstructural component and CG zone as the minor component represents
a new approach to further enhance the properties of UFG materials produced by
severe plastic deformation. It has been reported to be able to produce
unprecedented combinations of mechanical properties that are not accessible to
homogeneous materials. More importantly, heterostructured materials can be
produced using industrial facilities for large-scale production at low cost.
Significant research has been conducted in recent years to understand the
underlying mechanisms that control the mechanical behaviors of UFG and
heterostructured materials. This symposium focuses on all aspects of the
science and technology of heterostructured and UFG materials and covers a broad
scope, ranging from fundamental science to their industrial applications.
Specific topics include but are not limited to:
-Fundamental issues in processing UFGH materials including, but not limited to,
medium to severe plastic deformation techniques
- Deformation mechanisms of UFGH materials
- Novel UFG and heterostructures
- Mechanical and physical properties of UFGH materials
- Radiation-tolerant UFGH material
- Multiscale modeling of deformation and fracture
- Other processing methods for UFGH materials, such as powder processing and
rapid-solidification, mechanical and/or thermal processing
Mechanical deformation without an external heating can be used to modify the
microstructure of metallic alloys to achieve supersaturation of solutes,
nanoscale precipitate morphology, high density of defect structures, achieve
novel phase equilibria and obtain non-equilibrium grain boundaries and
interfaces. In the recent development of metallic alloy processing methods such
as solid phase processing, understanding how deformation modifies the
microstructure of metallic alloys in solid state is crucial. This symposium
will bring together researchers specifically studying the microstructural
engineering using deformation processing. This can include traditional severe
plastic deformation methods, friction stir processing/welding methods and other
deformation processing methods. The emphasis of this session will also include
using deformation to either accelerate equilibrium phase transformations or to
arrive at microstructural states not achievable by conventional
thermomechanical processing methods.
This symposium is the eleventh friction stir welding and processing symposium
during TMS Annual Meetings. This symposium will present fundamentals and the
current status of friction stir welding (FSW) and solid-state friction stir
processing of materials. It will provide researchers and engineers with an
opportunity to review the current
status of the friction stir related processes and discuss the future
possibilities. Papers are sought on all aspects of friction stir welding and
processing including their various derivative technologies.
Abstracts are requested in the following general topic areas related to
friction stir technologies:
• derivative technologies
• high temperature & lightweight applications
• industrial applications
• dissimilar alloys and/or materials
• controls & non-destructive examination
• simulation
• characterization
While the simple fact that plastic deformation efficiently converts mechanical
energy (work) into heat is well known, many questions regarding this (and
related) phenomenon are still unanswered or are not universally accepted. For
example, what factors (composition, microstructure, etc.) determine the
fraction of work which is converted into heat, what are the mechanisms of
converting deformation to heat, and what is the role of “phonon radiation” of
dislocations as they move at high velocities? Numerous research topics are
affected since these heating effects can lead to helpful or harmful plastic
instabilities during high-strain-rate deformation (Hopkinson bar tests,
plate-impact tests, shock-deformation), shear-banding, friction stir
welding/processing, machining, ball milling, etc. The topic of heat generation
is typically addressed by using thermocouples or infra-red cameras to record
the temperature rise associated with a corresponding plastic strain, but
usually, there is less clarity or discussion around the mechanisms of heat
generation. In conditions where visual or contact access is not possible,
indirect methods to infer heating history or simulations are required, which
includes assessment of degrees of dynamic recovery or recrystallization as an
indicator of local heating history. On the flip-side, it is becoming
increasingly clear that the mere presence of dislocations in the lattice can be
used to engineer the thermal and electrical transport of materials relevant to
applications as diverse as thermoelectrics, optoelectronics, topological
insulators, and superconductors. An emergent theoretical construct known as a
“dislon” has recently been introduced, which promises to explain such diverse
manifestations of the interactions between phonons, electrons and
dislocations. Therefore, this symposium aims to provide a forum for reporting
experimental, computational, and theoretical methods to understand both, heat
generation and heat transfer in materials, through the interactions between
phonons, electrons and dislons. Research exploring the fundamental physics, in
association with experimental validation, is also encouraged.
Lightweight metals such as Al and Mg continue to find increasing application in
engineering systems for transportation, energy, human welfare, and
infrastructure. Driving towards ever increasing benefits will require that we
leverage advances in the fundamental metallurgy of these alloys towards
improvements in manufacturing. This joint symposium between TMS and DGM (the
German Materials Society) is a forum for exchange and discussion of
state-of-the-art results that provide insight into previously unknown
characteristics and mechanisms in Al and Mg alloys and their connections with
manufacturing technology. Examples include new details and understanding of
deformation mechanisms, reports of novel metallurgical and microstructural
features and kinetics, and discovery of unique process-structure-property
relationships. This symposium will emphasize:
• Advanced characterization results, particularly three dimensional and/or time
varying measurements
• Unique theory and modeling results, including process and manufacturing models
• New directions in manufacturing, excluding additive manufacturing, such as
metamorphic manufacturing, high strain processing, and unique industrial
processes moving towards implementation
All abstracts and presentations must include discussion of new advances in the
basic science of lightweight alloys as well as implications for improved
manufacturing capabilities.
The Bladesmithing 2020 symposium will take the form of a traditional symposium
with technical presentations focusing on bladesmithing processes and
procedures. This symposium provides an opportunity for students or student
teams to present their work associated with, or inspired by, the 2017 and 2019
Bladesmithing competition as well as for new entries from students, student
teams, and seasoned bladesmithing TMS members. Participants may use any
starting material, from commercial stock material to material smelted from ore.
Students and student teams are required to have a faculty sponsor and are
expected to observe all of their campus’ applicable policies. All work must be
performed safely with elements of those safety procedures apparent in the
presentation. Final presentations should provide information on the
justification for choice of blade, any historical relevance, materials
characterization, mechanical and thermal treatments, processing of ore, etc.
Presentations will take the form of conventional talks, although posters may be
invited if the number of entries exceeds session capacity. Actual blades are
not to be brought to the conference, but safe metallurgical samples are allowed
and encouraged. Abstracts can be brief (at a minimum it must include a title,
university, name(s) of team members, and blade material) and should be
submitted by October 15, 2019.
A brief abstract explaining the historical background, blade material,
processing steps involved and characterization performed on the blades should
be included.
NOTE: The following information is required to complete this submission:
1. A title
2. An abstract and supporting information, including:
- A brief abstract (maximum abstract length 150 words)
- Name & email of the primary contact person (not a faculty advisor)
- Names of other team members, if known
- University affiliation
Objective: This symposium will provide a venue for presentations regarding the
use of advanced characterization techniques in all classes of materials to
quantify and model deformation mechanisms.
Background and Rationale: Advances in characterization technology have greatly
improved our ability to quantify deformation mechanisms such as dislocations,
twinning, and stress induced phase transformations, and the microstructural
changes accompanying deformation such as texture evolution, grain morphology
changes, and localized strain. A variety of relatively new techniques are
being applied to both structural and functional materials. These techniques,
in combination with modeling, are improving our understanding of deformation
and failure during material processing/forming and under normal or extreme
conditions in service. In situ techniques are also providing enhanced
understanding of individual mechanism interactions and direct validation of
plasticity models. This gathering provides a place to talk about new advances
in current techniques or in technique development as they apply to deformation.
Areas of interest include, but are not limited to:
(1) Dislocations, deformation twins, and stress induced phase transformations
(2) All advanced X-Ray-based techniques
(3) All advanced electron-based techniques including HR-(S)TEM, EBSD, HR-EBSD,
PED, and in situ TEM
(4) All structural and functional materials systems
(5) Advances in material modeling through the use of advanced characterization
techniques
(6) Industrial applications
(7) Technique development
A grand challenge in the production of next-generation transformative materials
at scale is to develop manufacturing methods that can circumvent the
constraints on chemistry and structure imposed by melt-based processing
approaches, and exploit the potential of non-equilibrium synthesis pathways to
produce materials with extraordinary performance. Solid Phase Processing (SPP)
is one high-potential approach to meeting this grand challenge for metals
synthesis and fabrication. In SPP methods (such as friction stir
processing/welding, shear assisted processing and extrusion, friction
extrusion, cold-spray, ultrasonic consolidation of powders or foil, solid-state
additive manufacturing, and in some cases, severe plastic deformation methods
such as high pressure torsion, equal channel angular extrusion/pressing and
accumulative roll bonding), a high shear strain is introduced into the
material, creating a mechanical-thermal coupling that facilitates diffusional
processes and phase transformations without requiring the alloy be melted.
Because the thermal energy required for material flow is generated entirely by
the frictional effects of the process itself, no external heating is required;
and the potential exists for rapid heating and cooling, combined with
kinetically-driven atomic movement, to enable controlled production of
metastable phases. However, a fundamental understanding of the deformation
physics, how they affect microstructural evolution, and in turn, how these
influence the mechanical/functional behavior, are lacking. Such understanding
is critical to harness the potential of SPP methods for unprecedented materials
performance.
This symposium is intended to cover a broad scope of solid phase processing
fundamental studies up to potential applications. It will provide a forum to
discuss fundamental physics and deformation mechanisms during SPP and
microstructural evolution under SPP conditions. Abstracts are solicited that
cover emerging processing approaches, characterization and theory/modeling of
SPP methods and novel experimental approaches that reveal the deformation
physics, analysis of defects, and their role of the resulting microstructural
evolution and properties. Topics of interest include, but are not limited to:
•Novel process condition probing methods for microstructural evolution
correlation
•Advanced characterization techniques (e.g. in-situ electron microscopy, light
source studies, nano/micromechanical testing, tribological approaches, etc.)
•Micro-, meso- and nanoscale theory and modeling of deformation (e.g.
ab-initio, MD simulations, phase field simulations, etc.)
•Explorations of the deformation or rapid thermal processing conditions
promoting persistent metastable phases
•Characterization of SPP material performance in extreme environments
(mechanical, irradiation, corrosion, etc.)
To avoid overlap with traditional friction stir welding/processing, preference
will be given to papers highlighting fundamental insights, novel in-situ
studies, broadly applicable computational tools in emerging SPP platforms,
technologies and advancements.
Engineering sheet metals are customarily characterized by simple mechanical
tests in order to meet mechanical properties given in OEM specifications. A set
of uniaxial tension tests suffice to provide various standardized properties
such as yield strength, ultimate tensile strength, strain hardening
coefficient, Lankford coefficients, strain rate sensitivity and forming limits.
However, when OEMs stamp a blank sheet to shape their final products, the
materials experience quite complicated histories of straining paths that may
significantly differ from behavior that is characterized by conventional
mechanical tests. For example, sheet metals usually experience much higher
strain rates, which may lead to phase transitions in the case of multiphase
advanced high strength steels. Additionally, the amount of strain during a
stamping process can far exceed what is typically obtained by the standard
uniaxial tension test. Critical areas of a stamping often experience changes
in the strain path.
The advanced constitutive models of today require material parameters obtained
under multiaxial and complex loading conditions. Over the past decades, the
sheet metal forming community has observed that such advanced constitutive
models improve the predictive accuracy on formability and springback. However,
in order to successfully train the models, unconventional experimental methods
are often required. Here a list of notable experimental methods is given: 1)
the cruciform test was designed to strain sheet metals in various stress
ratios; 2) The tension-compression test was designed to provide a deformation
history representing the bending and unbending of sheets during stamping; 3)
The hydraulic bulge test is a widely spread method to obtain hardening curves
to large levels of plastic strain, which standard uniaxial tests cannot
provide; 4) Combination of non-coaxial loadings can provide various stress
states, to which the phase transition is sensitive; 5) An experimental setup
consisting of multiple steps with various pre-strainings is also practiced in
order to observe constitutive behaviors under complex histories of deformation
that may occur in typical industrial stamping processes; 6) High speed tests
can subject the materials to a rate of speed similar to what is actually
observed during the stamping process.
The objective of this symposium is to explore numerous advances in experimental
testing and computational methods used for material characterization,
constitutive modeling, and analyses pertaining to sheet metal deformation in
multiple directions along multiple axes or with changing strain path
conditions. Potential participants are encouraged to submit abstracts on
research of material behavior related to microstructure based on multiple
directional deformation including but not limited to: improvements and new
methods of mechanical property measurement; characterization of phase
transformations and deformation mechanisms in multiphase microstructures during
forming; theory and modeling related to the mechanical properties; deformation
simulations, forming processes, friction and springback; multi-directional
mechanical testing and advanced strain/stress measurements; integration of
scientific knowledge with manufacturing practices; and development of accurate
constitutive relationships.
The ability to design and repeatedly produce complex, highly durable components
for demanding aerospace applications is generally taken for granted these days,
but this was not always the case. Edisonian techniques and institutional
knowledge were the prevailing methods to choose alloys and develop processing
routes with a primary focus of form over function. Little attention was paid to
material microstructure and its evolution over the course of processing, and
even fewer attempts were made to model it. This all changed when a small group
of scientists and engineers came together at Battelle Memorial Institute in the
late 1970’s and worked on a wide range of metals processing techniques. Their
early success, leveraging the momentum building in the steel industry during
World War 2, stemmed from their combined expertise in mechanics, metallurgy,
processing science, and computational methods. Their work was constantly
advancing the state of the art and often far before the rest of the world was
ready for it. For example, their team was the primary contractor for the very
first Air Force Materials Lab Processing Science Program. During this program,
the team developed (what we call now) a foundational engineering problem using
integrated computational materials science and engineering (ICME, or "ICMSE" in
some places) to optimize the process for creating a
dual-microstructure/dual-property Ti-6Al-2Sn-4Zr-2Mo disk – and they did this
~25 years before the widespread adoption of ICME in our community.
They were masters of understanding processes and developing practical
simulations of them. They devised elegant and convincing validation experiments
and paid careful attention to boundary conditions, process parameters, and
material behavior under processing conditions. Their work at Battelle and that
which followed when they each went their separate ways has touched every facet
of metals processing including: solid, liquid, and vapor phase processes, power
and wrought metallurgy, conventional and solid state joining processes,
high-speed machining processes, and additive manufacturing (a decade before the
current explosion of effort). Their work touched a vast array of
technologically important materials including titanium and its alloys,
nickel-base and cobalt-base superalloys, aluminum alloys, various
intermetallics, and high entropy alloys, among others. Within these alloy
systems, the honorees have contributed well over 1,000 papers to the body of
literature on analytical and numerical modeling of microstructure and texture
evolution and collectively advised over 200 graduate students! Their work led
to the formation of a small business focused on simulating virtually every
aspect of the metals processing value stream in the early 1990’s. This company
continues to thrive today and is an integral part of the aerospace metals
supply chain that produces flight-critical rotating components. The
contributions of Taylan Altan, Wei Tsu Wu, Soo-Ik Oh, and Lee Semiatin to the
field of processing science are so vast and impactful that it is the Structural
Materials Division’s great pleasure to honor their lifetime of achievements at
TMS 2020.
Paying homage to the honorees lifelong commitment to developing and validating
process models, this symposium will remain alloy-agnostic and instead keep
central themes of processing, process simulation, and modeling the evolution of
microstructure/texture/defects during processing. Hence, this symposium seeks
papers on any metallic material system in the following areas: (1) wrought
processing, (2) powder production, (3) powder processing, (4) melting and
casting, (5) solid-state joining operations, (6) additive manufacturing, (7)
machining operations, and (8) application of numerical methods in processing.
Preference will be given to papers that combine experiment with modeling for
greater insight into material behavior and also those that span more than one
of the above topic areas. Invited speakers from academia and government labs
will highlight the honoree’s technical breadth and depth while those from
industry will highlight the impact of their work in a production environment.