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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advanced Characterization of High-temperature Alloys: Phase Evolution during Manufacturing and Service-induced Deformation
Sponsorship TMS Structural Materials Division
TMS: High Temperature Alloys Committee
Organizer(s) Katerina A. Christofidou, University of Sheffield
Benjamin Adam, Oregon State University
Stoichko Antonov, Max-Planck Institut für Eisenforschung GmbH
James Coakley, University of Miami
Martin Detrois, National Energy Technology Laboratory
Paraskevas Kontis, Norwegian University of Science and Technology
Stella Pedrazzini, Imperial College London
Sophie Primig, University of New South Wales
Scope 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.

Abstracts Due 07/17/2022
Proceedings Plan Planned:

A Microscopy Investigation on the Nucleation and Propagation of Superlattice Stacking Faults in Nickel-based Superalloys
A New Paradigm for Wrought Superalloys with Superior Fatigue Strength
A Resistivity-based Method for Measuring Precipitate Formation and Dissolution in a Nickel-base Superalloy
Accelerating Alloy Development for Additive Manufacturing
Advanced Characterization of Centrifugally Cast HP40 Reformer Tubes
An In-Situ Elevated Temperature Investigation of Plasticity and Damage Evolution in a Ni-based Superalloy
Characterization of Deformed Structures in γ′ Containing Superalloys
Comparison of Laboratory-generated and Ex-service Fractography for a 4th Generation Single Crystal Ni-based Superalloy
Continuum Scale Approach to Characterization and Modeling of Deformation Mechanisms in Haynes 244 Alloy
Creep Assisted Phase Transformation Deformation Mechanisms in Polycrystalline Ni-based Superalloys and Their Impact on the Creep Performance
Effect of Machining Processes on the Perceived Mechanical Properties of Tantalum Refractory Alloys
Effect of Temperature, Stress and Environment on Preferential and Internal Oxidation of Ni-base Alloys
Effects of Heat-Treatment on the High-Temperature Wear Behaviors of Additively Manufactured Inconel 718
Grain Boundary Microstructure Optimization in Ni-Co-based Wrought Superalloys
High-resolution Characterization of Grain Boundary Precipitates and Their Interfaces in Ni-based Superalloys with B and C Additions
High Temperature Creep Properties along Concentration Gradients in Superalloys
In Situ High Energy Diffraction Investigation of the Dynamic and Meta-dynamic Recrystallization of Ni Base Superalloy Haynes 282
Influence of Local Thermal History during Laser Powder Bed Fusion Additive Manufacturing on Solidified Microstructure and Phase Transformations during Subsequent Heat Treatment
Leveraging Local Phase Transformation Strengthening to Achieve Superior Next Generation Superalloys
Local Phase Transformation Strengthening in CoNi-base Superalloys
Microstructural Characterization of Cost-effective Inconel 738LC Superalloy after Tensile Deformation at Various Temperatures
Microstructural Control of LPBF Inconel 718 through Post Processing of Intentionally Placed AM Discontinuity Distributions
Microstructure Evolution and Deformation Micromechanisms in Refractory High Entropy Superalloys
Microstructure Evolution and Mechanical Properties of α′/α″-Strengthened Ferritic Superalloys
Monotonic Mechanical Behavior of a Nickel-based Single Crystal Superalloy with a Bimodal Precipitation
Phase- and Orientation-specific Mechanical Response during High-temperature Deformation of a γ' Strengthened Ni-based Superalloy
Phase-Field Modeling of Rafting in Ni-Based Superalloys with a Varying Lattice Misfit
Quantifying Creep Deformation Behavior of Optimized Local Phase Transformation Strengthened Next Generation Superalloys
Segregation-assisted Yield Strength Anomalies in Superalloys
STEM/SEM Study on the Microstructural Evolution and Deformation Mechanisms of Fe-25Cr-20Ni-1.4Nb-0.2C Steel Fabricated by Laser Powder-bed Fusion
Superalloys by Computational Optimization: Phase Evolution and Creep Properties
Surface Integrity and Microstructural Characterization of Additively Manufactured Inconel 625 subjected to Shot Peening and Laser Peening
TEM Characterization of Tensile Behavior of Advanced Ni-based Single-crystal Superalloys
Temporal Evolution of γ′ Precipitate in HAYNES 282 during Ageing: Growth and Coarsening Kinetics, Solute Partitioning and Lattice Misfit
The Role of Ru on the Deformation Mechanism of a Single Crystal Superalloy during Thermomechanical Fatigue
Understanding Phase Evolution and Deformation in High Temperature Materials via In-situ/Operando Neutron Diffraction
Variations in γ′ Formers and Refractory Elements for Enhanced Creep Resistance and Phase Stability of Alloy 282

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