High Temperature Alloys Committee

Technical Programming

2026 TMS Annual Meeting & Exhibition: Accelerated Discovery and Insertion of Next Generation Structural Materials: Organized by Eric Payton; Thomas Mann; Bharat Gwalani; Andrew Bobel; Sriswaroop Dasari; Michael Fahrmann; Akane Suzuki

Stability of structural materials is of great importance to avoid catastrophic failures during operation across the aerospace, transportation, and energy fields. Stability is significantly affected by processing route. Understanding responses to stress, hydrostatic pressure, temperature, irradiation, or corrosive conditions is essential for designing alloys for all service environments. 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. This symposium will also help identify some critical areas/needs in new methodologies/tools for the community to focus upon and how they are being validated and corroborated with experimental evidence. The topics of interest to this symposium include, but are not limited to, the following: • Integrated computational materials engineering (ICME) tools coupled with multi-scale experimentation to correlate processing history to microstructural hierarchy and ensuing property response • Novel modeling approaches for reliable prediction of material properties, including multi-objective optimization and machine learning based approaches • Unraveling the complex interplay between driving forces and mobility for competing microstructure evolution processes • Mechanisms of material responses to combined chemo-thermo-mechanical loading and modeling that incorporates new mechanistic understandings of behavior • High throughput experimental approaches to facilitate training of machine learning models • Qualification pathways and status of qualification for next generation materials and manufacturing processes One session of this symposium will focus on materials scientists and engineers who work on alloy development for a wide range of industrial applications providing a forum to discuss the methodology for design, property optimization, and successful and unsuccessful techniques or examples. Uniting academia and industrial research will facilitate a fruitful interaction on the newest techniques being developed and the experiences of alloy developers in their use. This symposium has historically been primarily focused is on structural high temperature materials such as refractory alloys; high-entropy alloys, medium-entropy alloys, complex concentrated alloys and alloys proposed under similar design concepts; Co-, Ni-, Nb-, and Ti-based alloys; maraging steels; alumina-forming steels; and ODS alloys. Abstracts involving multiple processing routes are welcome, including additive manufacturing, powder metallurgy, casting, wrought processing, and combinations thereof.

2026 TMS Annual Meeting & Exhibition: Advanced Materials for Reusable Rocket Engines: Organized by Zachary Cordero; Natasha Vermaak

New reusable rocket engines currently under development use high efficiency staged-combustion power cycles which subject materials to extreme operating conditions, involving cryogenic temperatures, extreme temperature swings, high heat fluxes, and ultra-high-pressure oxygen. These conditions give rise to a host of catastrophic failure modes, from metal fires to oxidation-assisted fatigue to strain-ratcheting induced creep rupture. Legacy materials were used to design and fabricate current reusable rocket engines. Companies are now racing to update technology and develop new platforms, but the challenges are formidable and require collaborative teams. There are exciting opportunities to apply modern design and development tools and to exploit huge advances in materials over the past 20 years to specifically tailor materials to meet the extreme environments of reusable propulsion systems. The three components that dictate the life of a reusable boost-stage staged-combustion rocket engine are the thrust chamber, turbopump and nozzle. Each operates in disparate conditions that drive distinct failure modes, motivate different material choices, and present unique research opportunities. This symposium will feature talks on the material behaviors and failure modes in these applications as well as novel materials, manufacturing processes, and structures that can overcome these failure modes to unlock advances in reusable rocket engine technology.

2026 TMS Annual Meeting & Exhibition: Advances in the State-of-the-Art of High Temperature Alloys: Organized by Benjamin Adam; Dinc Erdeniz; Jonah Klemm-Toole; Nicholas Krutz

High-temperature alloys continue to play a vital role in many applications and industries, such as aerospace and energy. Key aspects of development efforts include improving system efficiency by raising the maximum operating temperature, improving the strength/density ratio, and ensuring long-term mechanical performance. In recent years, there have been advances on several fronts, such as the design of novel Co-based superalloys, multi-principal element alloys, refractory systems, and predictive capabilities for lifetime performance. This symposium aims to provide a setting for submissions from academia, government, and industry to discuss recent advances in understanding the fundamental behavior, structure, properties, and performance of high-temperature alloys.

MS&T25: Materials Science & Technology: Alloy Phase Transformations at Elevated Temperatures: Organized by Dinc Erdeniz; Mark Aindow; Jonathan Priedeman; Vahid Tari

High-temperature alloy systems remain integral to structural applications in the aerospace, automotive, and power generation industries. The phase transformations occurring during fabrication and post-processing are critical in establishing the desired properties of these alloys. Conversely, transformations during manufacturing or in-service can lead to failure. Understanding the mechanisms behind these phase transformations and their influence on material properties is essential for the successful design and application of these alloys under elevated temperatures. Topics of interest include recent experimental and computational advances in the field of phase transformations of high temperature alloys, across the spectrum from model- to commercially-offered-alloys. Such alloys include aluminum-base, titanium-base, iron-base, nickel-base, refractory-base, and multi-principal-element alloys, as well as intermetallic systems.

2025 TMS Annual Meeting & Exhibition: Additive Manufacturing and Alloy Design: Bridging Fundamental Physical Metallurgy, Advanced Characterization Techniques, and Integrated Computational Materials Engineering for Advanced Materials: Organized by Amir Farkoosh; David Seidman; Enrique Lavernia; Noam Eliaz; Lee Semiatin

Obviating some of the traditional manufacturing and alloy design barriers, additive manufacturing (AM) makes possible complicated micro-/nano-structures and geometries, which cannot be obtained via conventional manufacturing. Advanced materials, which can outperform their conventional counterparts, are actively being designed with substantially distinctive microstructural features. This symposium invites submissions that focus on exploiting the unique characteristics of AM to design and develop advanced structural or functional materials, employing a “First-Principles” or “Materials by Design” approach. This symposium will feature a comprehensive exploration of the fundamental physical metallurgy and alloy design principles for AM, leveraging the power of advanced characterization techniques, computer simulations, and analytical theory to unlock insights into materials behavior. A significant emphasis of the symposium is placed on alloy design principles, strengthened by the integration of state-of-the-art characterization techniques, such as atom-probe tomography (APT), scanning/transmission electron microscopy (S/TEM), electron backscatter diffraction (EBSD), X-ray diffraction (XRD), and 4D scanning transmission electron microscopy (4D-STEM) in combination or correlatively. These cutting-edge techniques combined with analytical theory, and mathematical and physical simulations provide researchers with the tools to study AM materials at a hierarchy of relevant length scales, allowing for a holistic and nuanced understanding of their far-from-equilibrium structures, as well as their physical and mechanical properties. Discussions surrounding the synergies between Integrated Computational Materials Engineering (ICME), physical simulations and real-world experiments, which highlight the potential of this combined approach in advancing AM materials research are encouraged. By bringing together experts in physical and mechanical metallurgy, advanced characterization techniques, ICME, and thermodynamics, the symposium aims to propel the field toward innovative breakthroughs in materials design for AM. Abstracts of fundamental or applied research are invited in the following subject areas: -Introduction of novel structural or functional alloys designed specifically for additive manufacturing, including but not limited to: light metals (Al, Ti, Mg), steels, ferrous alloys, high-temperature alloys (Ni-, Fe-Ni- or Co-based superalloys), refractory alloys (Re, W), and high-entropy alloys. - Micro-/nano-structure evolutions and phase transformations, including new stable or metastable phases formed under AM solidification conditions, which can be utilized to enhance the mechanical or physical properties of materials. - Mechanical behavior - Physical behavior

2025 TMS Annual Meeting & Exhibition: Advanced Materials for Energy Conversion and Storage 2025: Organized by Surojit Gupta; Jung Choi; Amit Pandey; Partha Mukherjee; Soumendra Basu; Paul Ohodnicki; Eric Detsi; Cengiz Ozkan

This symposium intends to provide a forum for researchers from national laboratories, universities, and industry to discuss the current understanding of materials science issues in advanced materials for energy conversion and storage, including high-temperature processes, and to discuss accelerating the development and acceptance of innovative materials, and test techniques for clean energy technology. For further understanding, accelerating the innovation and making the symposium focused, we have divided the symposium into four interconnected themes, namely: (a) Energy Conversion, (b) Energy Storage, (c) Materials Design, and (d) Functional themes (each theme is described in detail in the next section). Recent developments in AI (Artifical Intelligence), big data, and Deep Learning will be a common factor for each theme. It is expected that the synergism and interdisciplinary nature of different themes as well as involvement of leading experts will provide the attendees an inclusive and holistic forum for discussion and learning new developments in Energy Conversion and Storage in the Symposium. Theme 1: Energy Conversion SOFCs and reversible SOFCs/SOECs PEM fuel cell Thermoelectric Devices The durability of the fuel cell and stack materials Degradation due to thermo-mechanical-chemical effects Effect of microstructure evolution on the properties and efficiency Chromium poisoning from interconnections and Balance of Plant Theme 2: Energy Storage Batteries Physicochemical Interaction in intercalation, conversion, and metal batteries, e.g., lithium-ion, solid-state, Na-ion, Li-S, Li-air Electrode microstructure - property - performance interplay Mesoscale modeling and characterization (e.g., X-ray tomography) Degradation (e.g., mechanical, chemical, electrodeposition) and safety characteristics in electrodes Theme 3: Advanced Materials Design for Sustainability and Energy Harvesting Advanced Materials for Solar Energy Advanced Materials for Wind Energy Supercapacitor Green Tribology Life cycle analysis of materials and products Theme 4: Functional Materials, including coating, Ceramics, and Alloys Functional Oxides, Nitrides, and Carbides Ceramics and Dielectrics Sensors Thermal Energy Harvesting, Conversion, storage, and Management Devices Functional Coatings for Harsh Environments Nanotechnology and Multifunctional Materials Membrane Separation Materials, Processes, and Systems (H2, O2, CO2) Water Splitting and Other Catalyst Applications In-Situ Spectroscopy and Advanced Characterization of Functional Materials Harsh Environment Electromagnetic Materials

2025 TMS Annual Meeting & Exhibition: Advances in Bcc-Superalloys: Organized by Alexander Knowles; Christopher Zenk; Howard Stone; Oleg Senkov; Eric Lass; Thomas Hammerschmidt

Bcc-superalloys are a nascent class of material, with a microstructure comprising a body-centered-cubic matrix (eg refractory metal, Fe, Ti) reinforced by ordered-bcc superlattice precipitates (eg B2 NiAl), with analogy to the highly successful gamma gamma-prime in fcc nickel based superalloys. Bcc-superalloys offer a new design approach to achieving improved performance for a variety of high temperature applications, from gas turbines to fusion energy. This symposium seeks to bring together this growing community, with topics including, but not limited to: refractory metal bcc-superalloys (e.g. for W), bcc refractory metal high entropy superalloys (RSAs and Naka+Khan type RHEAs), Beta-Ti superalloys, Cr bcc-superalloys, Ferritic superalloys, A2-B2 eutectics / composites. We welcome papers across the topics of: bcc-metals, Refractory Metals, High Temperature Materials and High Entropy Alloys, with a focus on the bcc-superalloy microstructural template; including: design, production, characterisation and property demonstrations.

2025 TMS Annual Meeting & Exhibition: Sustainability of High Temperature Alloys: Organized by Mark Hardy; Caspar Schwalbe; Jeremy Rame; Benjamin Adam; Jonah Klemm-Toole; Martin Detrois; Katerina Christofidou

The Symposium is aimed at high temperature alloys, those based on Ni, Co and Fe, that are used for components in aerospace propulsion, power generation, chemical processing, and oil and gas applications. It is proposed that the following topics areas are discussed, based on the 6 R’s: Rethink, Refuse, Reduce, Re-use, Repair, Recycle. Rethink: substitute with other alloys or materials, and Refuse: conscious efforts to minimise or avoid using critical elements, e.g., Ru, Re, Co, Ta etc, in alloy development and materials selection. Reduce: strategies for reducing consumption or input weight, e.g., use of different material processes, and extending component service-life via improved understanding of material and component behaviour. Re-use: cleaning and re-conditioning technologies for components, and inspection of components in-situ or during shop visits and Recycle: use of revert for raw material supply. Repair: restoring components after deterioration in-service.

2025 TMS Annual Meeting & Exhibition: Validation of Computational Tools - Industrial Perspectives: Organized by Qiaofu Zhang; Michael Titus; Stephane Forsik; Govindarajan Muralidharan; Jonathan Priedeman

Integrated Computational Materials Engineering (ICME) has been widely adopted through academia, national labs, and industry for the design and development of new materials and manufacturing processes. This symposium will highlight efforts to transition computational tools to industrial practice as they relate to high temperature alloys, with special focus on validating tools through targeted experiments and industrially relevant manufacturing practices. Abstracts and presenters should include perspectives on lessons learned on implementing new ICME tools for manufacturing, as well as current challenges and opportunities to improve computational tools. Topics of interest include, but are not limited to: - ingot production (vacuum induction melting, arc melting, remelting processes) - casting (investment, directional solidification) - thermo-mechanical processing (cold and hot rolling, swaging, heat treatment) - powder processing (injection molding, hot isostatic pressing, powder fabrication) - Fe, Ni, and Co-based alloys

MS&T24: Materials Science & Technology: Advances in High-Temperature Oxidation and Degradation of Materials for Harsh Environments: A SMD and FMD Symposium Honoring Brian Gleeson: Organized by Kinga Unocic; Wei Xiong; Elizabeth Opila; Richard Oleksak; Rishi Pillai; Bruce Pint

Abstract submissions are by invitation only. For over thirty-five years, Professor Brian Gleeson has been a leader in corrosion science advancing understanding of the high temperature oxidation and degradation of alloys and coatings. Brian has illuminated key thermodynamic and kinetic aspects controlling the degradation of materials in harsh environments, from gas/solid reactions to diffusion in the alloy and everything in between. Brian's research career has included positions in Canada, Australia, and the USA. Brian began his academic career at the University of New South Wales in 1990, moving to Iowa State University in 1998, before settling at the University of Pittsburgh in 2007 where he builds upon a rich history of high temperature corrosion research at the school. Throughout this time Brian’s expertise, unassuming nature, and genuine interest in both research and teaching has helped to shape countless students and young researchers comprising the next generation of high temperature corrosion scientists and engineers. This symposium serves to recognize the exceptional quality of research and mentorship that Brian has demonstrated throughout his career. As with Brian’s own research, this symposium will cover all aspects of the high temperature corrosion process. The aim of this special symposium is to provide a forum for scientists and engineers to present and discuss recent work on current understanding and characterization of corrosion in high temperature aggressive environments. To align with Prof. Gleeson’s areas of research, specific forms of degradation include but not limited to mixed-gas attack (e.g., oxidation-sulfidation, oxidation-carburization, oxidation-chloridation), hot corrosion, deposit-induced attack, and metal dusting. These forms of attack may be in combination with some form of mechanical loading (e.g., fatigue and creep) and/or thermal cycling.

2024 TMS Annual Meeting & Exhibition: Accelerated Testing to Understand the Long Term Performance of High Temperature Materials: Organized by Jonah Klemm-Toole; Benjamin Adam; Andrew Wessman; Dinc Erdeniz; Chantal Sudbrack; Kinga Unocic

High temperature materials are used in aerospace, power generation, and chemical processing industries where components are expected to withstand superior temperatures, high stresses, and reactive environments during service intervals that last for decades. In order to design these components, methods to accelerate service degradation are needed such that a mechanistic understanding can be developed in a much shorter time frame, typically on the order of months. In this symposium, abstracts are requested on topics including but not limited to: • Accelerated creep and fatigue testing methodologies, modeling frameworks, and prediction capabilities • Modeling and/or experimental methods to accelerate microstructure evolution and/or mechanical property degradation at elevated temperatures and/or aggressive environments • Experimental methods to accelerate environmental interaction of high temperature materials • Interactions of creep, fatigue, environmental effects, and microstructure evolution

2024 TMS Annual Meeting & Exhibition: Advances in the State-of-the-Art of High Temperature Alloys: Organized by Dinc Erdeniz; Benjamin Adam; Michael Kirka; Jonah Klemm-Toole; Juan Carlos Madeni; Govindarajan Muralidharan

High temperature alloys continue to play a vital role in the transportation and energy industries. While both sectors look to improve the system efficiency by raising the maximum temperature the alloys can withstand, the transportation industry is also focused on lightweighting. In recent years we have seen advances in a number of different alloy systems. This symposium aims at providing a setting for researchers from academia, government, and industry to discuss recent advances in the understanding of various mechanisms that influence the strength, service life, and environmental resistance of high temperature alloys.

2024 TMS Annual Meeting & Exhibition: Functionally Graded Materials, Coatings and Claddings: Toward Microstructure and Property Control: Organized by Aurelien Perron; Kaila Bertsch; Emma White; Iver Anderson; Timothy Prost; Matthew Dunstan

Most industrial applications such as the aerospace, automobile, biomedical and defense areas need materials that must operate in increasingly extreme and complex environments. Usually no single existing alloy can meet all the requirements of a desired system component. Thus, the successful design and processing of a gradual change in composition and microstructure, and therefore properties, over the whole material is gaining considerable attention in materials science and engineering. Graded materials, coatings and claddings allow for unique combinations of properties to enable various harsh environment, functional and structural applications. In practice, functionally graded materials (FGMs) are often susceptible to processing defects linked to prohibitively time-consuming, empirical process development without the ability to predictively determine and/or rapidly screen experimentally viable pathways (composition and process parameters) to optimize their production. Due to these limitations, the actual performance of FGMs, relative to conventional parts, remains to be validated and optimized. This symposium focuses on all aspects of the science and technology, from fundamental science to industrial applications, that will enable control of the microstructure and properties of graded materials coatings and claddings, including: thermodynamic, kinetic, property, and microstructure evolution simulations; rapid processing; in situ characterization; and understanding defect formation. Many types of gradient systems are of interest, including from one alloy composition to another, from metals to ceramics, and from intermetallics to metals. Advances in coating technologies, new compositions of coatings, and advanced manufacturing techniques are of interest. Specific topics include, but are not limited to: • Fundamental issues and underlying mechanisms in processing FGMs, coatings, and claddings • Development and demonstration of computational-experimental platforms to produce viable graded components ready for various types of advanced testing • Novel graded material combinations, coatings, and claddings for targeted applications (i.e., optimized mechanical, functional and corrosion properties) • Understanding of solidification, phase stability, and phase transformation in FGMs • Computational prediction of optimal material gradients and properties with minimal processing defects, such as porosity • Advanced processing methods for FGMs, coatings, and claddings: additive manufacturing, physical vapor deposition, pack cementation, slurry c coating, powder-based laser deposition, cold spray, thermal spray, and friction stir processing • Novel techniques and characterization methods for rapid FGM, coating, and cladding optimization

2023 TMS Annual Meeting & Exhibition: Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation: Organized by Katerina Christofidou; Benjamin Adam; Stoichko Antonov; James Coakley; Martin Detrois; Paraskevas Kontis; Stella Pedrazzini; Sophie Primig

High temperature alloys, including Ni-based, Ni-Fe-based and Co-based superalloys, are critically important in enabling technological advancements from the aerospace to the power generation, chemical processing and manufacturing industries to atomic energy. Fundamental to the performance of these materials are their deformation characteristics, both in terms of the deformation necessary during manufacture as well as the deformation sustained during service. Critical developments in the field of high temperature alloys in recent years have been reliant on controlling and utilising deformation and deformation induced phase transformations to achieve superior performance at increasingly higher temperatures. Such advances have been further enabled by the unparalleled innovation in the advanced characterisation methods and data analysis tools used to investigate deformation characteristics in these materials, such as dynamic TEM, atom probe tomography, high resolution EBSD, advanced neutron and synchrotron X-ray diffraction and resonant ultrasound spectroscopy, to name a few. The aim of this symposium is to bring together the community to discuss the effect of deformation on microstructural control and performance in high temperature materials (Ni, Ni-Fe, Co superalloys, refractory metal alloys, multi-principal element alloys) through the lens of advanced characterisation. The proposed technical scope of the symposium includes (but is not limited to): • Novel insights into deformation mechanisms obtained from advanced characterisation and modelling validation methods; including elemental segregation, phase-specific deformation characteristics and defect evolution. • Deformation assisted microstructural control of high temperature alloys during manufacturing processes (including powder metallurgy and additive manufacturing methods). • Deformation determined in-service performance of materials for high temperature structural applications (including mechanical performance as well as environmental resistance). • Co-operative chemistry and processing design for improved alloy performance. • Deformation effects on “finishing operations” including machining, heat treatment and shot peening. • Effect of deformation on phase and property evolution. • High throughput methodologies for deformation assessment in manufacturing and in service performance. • Role of deformation in phase transformations and microstructural evolution. • Non-destructive and correlative evaluation of deformation accumulation during manufacturing and under in service conditions.

2023 TMS Annual Meeting & Exhibition: Alloy Behavior and Design Across Length-Scales: An SMD Symposium Honoring Easo George: Organized by Michael Mills; George Pharr; Robert Ritchie; Muralidharan Govindarajan

This symposium is by invitation only. Through his creativity and scientific excellence, Easo George has made seminal contributions to metallic materials research. During his long tenure at the Oak Ridge National Laboratory and the Alloy Behavior and Design Group, most recently as Governor’s Chair, he has led the nation’s most active alloy development research activities. His expertise in phase transformations and alloy processing has enabled innovations in intermetallics, refractory alloys, and high entropy alloys. His group’s research has provided insights in the wide-ranging topics of ductility and fracture behavior in intermetallics, deformation behavior of refractory metals, and compositional effects in high entropy alloys. In addition, his innovative work on the solidification of eutectic single crystal microstructures provided a unique pathway for creating small material volumes for exploring size effects in mechanical behavior. In addition to the impact of his group’s own research, he also generously enabled the research efforts of many collaborators by providing alloys with highly controlled chemistries and microstructures. This symposium will provide a forum for presentation of topical advances in: • Principles of alloy behavior and design • Strategies for defeating the strength-ductility “trade-off” • Compositionally complex (high entropy) alloys • Small-scale mechanical behavior • Links between deformation mechanisms and mechanical behavior • Advanced metallic alloys and intermetallics for high temperature structural applications

2023 TMS Annual Meeting & Exhibition: High Temperature Creep Properties of Advanced Structural Materials: Organized by Gianmarco Sahragard-Monfared; Mingwei Zhang; Jeffery Gibeling

Given the simultaneous development of high temperature alloys and manufacturing processes, it is necessary to investigate the effects on creep properties of these coexisting advancements. With the resurgence of high temperature refractory alloys and oxide dispersion alloys through the relatively new material class of multi-principal element alloys and the advent of other such superalloys, it is critical to re-examine conventional behaviors of creep as these new alloys introduce additional mechanisms that have not been traditionally observed. Beyond compositional advances, there have been exceptional fabrication and processing advances in the last decade such as those in additive manufacturing that directly impact the creep properties of these materials. This symposium focuses on the new challenges and new opportunities in advanced structural materials for service under extreme conditions and poses a reconsideration of what is thought to be typical high temperature creep behavior given this ever changing materials landscape.

2023 TMS Annual Meeting & Exhibition: Simulations/Experiments Integration for Next Generation Hypersonic Materials: Organized by Thomas Voisin; Jibril Shittu; Aurelien Perron; Joseph McKeown; Raymundo Arroyave

Supersonic and hypersonic regimes require materials resistant to high temperature and high-rate deformation to survive extreme aerodynamics and aerothermal conditions. Furthermore, candidate materials must retain high strength and sustain oxidation, creep, fatigue, and widely varying cyclic thermal gradients. Although limited in the application space, several candidate materials such as composites, ceramics, and refractory multi-principal-elements alloys (MPEAs) hold the potential to satisfy these needs. Improving existing or developing new materials requires integrating both simulations and experiments to cover all length scales, temperatures, and strain-rates. Simulation can fill gaps where experiments are not possible or supports experimental results analysis when in-situ observations are unpractical. This symposium intends to foster presentations and discussions around new approaches to design next generation materials beyond supersonic applications. We invite abstracts submission on the following topics for high temperatures and high strain rates applications: - Simulations for accelerated alloy design (CALPHAD, crystal plasticity, phase-field, atomistic…) - Microstructures and mechanical properties (uni- or multi-axial loading, damage, fatigue…) - Degradation (corrosion, oxidation, wear…) - Advanced in-situ characterization techniques (electron microscopy, high energy X-ray diffraction and tomography…) - 3D characterization (electron back scattered diffraction, high energy X-ray diffraction and microscopy…) - Advanced processing for metastable materials and near-net shape components - Coatings and internal cooling systems

2022 TMS Annual Meeting & Exhibition: Deformation and Damage Mechanisms of High Temperature Alloys: Organized by Mark Hardy; Jonathan Cormier; Jeremy Rame; Akane Suzuki; Jean-Charles Stinville; Paraskevas Kontis; Andrew Wessman

High temperature alloys, notably Ni-, Co- and Fe-based superalloys are enabling materials for the design of high-temperature components for aerospace propulsion, chemical processing, oil and gas applications, and power generation. They retain superior strength at elevated temperatures, and show excellent damage tolerance, toughness, long-term stability and resistance to creep accumulation and environmental damage. The performance of these alloys is often improved when formed to optimize microstructure or used in conjunction with surface treatments and coatings or with novel design solutions. The aim of the symposium is to discuss the mechanisms of deformation and damage in the manufacture, application and refurbishment of high temperature alloys, principally Ni, Co and Fe based superalloys but also high entropy or multi-principal element alloys and refractory alloys. It is proposed that the technical focus is in understanding:(i)Roles of deformation and heat treatment on the evolution of microstructure during material processing, (ii)Effects of deformation from manufacture on material and component behaviour, (iii)Mechanisms of deformation that determine material behaviour, (iv)Development of deformation that gives rise to damage during material application, (v)Effects of composition and microstructure on resistance to deformation and damage accumulation, (vi)Refurbishment, rejuvenation and life extension processes. Topics of interest may include (but are not limited to):(a)Elevated temperature forging, recrystallization, grain growth, flow forming, machining and shot peening, (b)Advanced solidification techniques and impact on properties, (c)Experimental observation of deformation and damage accumulation, (d)Constitutive and computational modeling of deformation, (e)Mechanisms of ambient and elevated temperature plasticity, creep, fatigue (LCF, HCF, VHCF), creep-fatigue, crack growth and environmental damage.

2021 TMS Annual Meeting & Exhibition: Additive Manufacturing: Solid-State Phase Transformations and Microstructural Evolution: Organized by Bij-Na Kim; Andrew Wessman; Chantal Sudbrack; Eric Lass; Katerina Christofidou; Peeyush Nandwana; Rajarshi Banerjee; Whitney Poling; Yousub Lee

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.

2020 TMS Annual Meeting & Exhibition: Advancing Current and State-of-the-Art Application of Ni- and Co-based Superalloys: Organized by Chantal Sudbrack; Mario Bochiechio; Kevin Bockenstedt; Katerina Christofidou; James Coakley; Martin Detrois; Laura Dial; Bij-Na Kim; Victoria Miller; Kinga Unocic

Superalloys are critical to operation and future design of a wide variety of propulsion and power generation components in the aerospace, marine, and energy industries. Their industrial application is often driven by excellent long-term stability and durability at elevated temperatures or in aggressive environments because they display a good balance of mechanical strength, fatigue and creep resistance, as well as corrosion and oxidation resistance. The symposium aims to attract papers on current and state-of-art application of Ni- and Co-based superalloys. Topics of interest may include (but are not limited to): • Viability of fabrication with additive manufacturing methods (powder bed techniques and direct energy deposition) • Relationships of metallurgical processing with microstructure and performance (i.e. casting, forging and heat treatment) • Mechanisms of ambient and elevated temperature plasticity, creep, fatigue, creep-fatigue, crack growth and environmental damage • Mitigation of environmental, thermal, and thermal mechanical damage, including improved coatings for service operation • Advancement in joining, repair, and rejuvenation of superalloys

2020 TMS Annual Meeting & Exhibition: Materials Design Approaches and Experiences V: Organized by Akane Suzuki; Ji-Cheng Zhao; Michael Fahrmann; Qiang Feng; Michael Titus

This symposium is a continuation of four previous successful symposia held at TMS annual meetings in 2001 (Indianapolis), 2006 (San Antonio), 2012 (Orlando) and 2016 (Nashville). It serves as a periodic review of the state-of-the-art development on the subject. In this symposium, we will bring together materials scientists and engineers to share their experiences, including successful and unsuccessful examples, challenges, lessons learned, in developing wide variety of class of alloys for industrial applications, as well as new tools and methodologies that enable efficient alloy design and accelerated implementation processes. The interaction between the two groups will bridge the gaps between them, thus accelerating the transition of new design tools to alloy development. Covering both past experiences and new approaches – both experimental and computational, this symposium will also help identify some critical areas/needs in new methodologies/tools for the community to focus upon. Applications of artificial intelligence and machine learning to alloy design are one of the new areas of interest in this symposium.