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Meeting 2020 TMS Annual Meeting & Exhibition
Symposium Hume-Rothery Symposium: Thermodynamics, Phase Equilibria and Kinetics for Materials Design and Engineering
Presentation Title Phase Equilibria and Interfacial Migration in Stressed Solids
Author(s) Nicholas J Weadock, Peter W. Voorhees, Brent Fultz
On-Site Speaker (Planned) Peter W. Voorhees
Abstract Scope A possible route to storing hydrogen for hydrogen-based energy systems is via hydride formation. One challenge of using metal hydrides to store hydrogen is an efficiency loss due to hysteresis: the absorption and desorption of hydrogen does not occur at the same hydrogen gas pressure. We examine phase formation and phase equilibria in the hydrogen-palladium system where a significant difference in lattice parameters between the hydride and matrix phases generates stress in the system. The stress is thought to lead to a coherent phase equilibrium state that induces the hysteresis. However, experiment shows that the hysteresis is present even in a partially transformed system, indicating that a stress-induced jump in volume fraction of hydride is not responsible for the hysteresis. An explanation for the hysteresis that is based upon the driving force for interface migration in a stressed solid will be presented.
Proceedings Inclusion? Undecided

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A Hexagonal Close Packed Multi-principal-element Alloy Identified Computationally
Alloys, Processing, Applications, Models and Software: The Wide Domain of Gibbs Energies Sets Giving Impulse to Invention
Application of Calphad-based Computational Tools to Alloy Development for Additive Manufacturing
Calphad Applications and Challenges in Gas Turbine Coatings
CALPHAD Databases for Co-based Alloys
Computational Thermodynamics in Microstructure Modelling and Beyond
Developing CALPHAD Databases for Thermophysical Properties of Metals and Alloys
Development of a Comprehensive Diffusion (mobility) Database for Lightweight Magnesium Alloys
Diffusion Mobilities in Co-Ni-Al-Cr System
First-principles Thermodynamics of Refractory Alloys and their Oxides
How Can the CALPHAD Method Do Better?
Improvement of a CALPHAD Database for the Development of Next Generation TiAl Alloys by Targeted Key Experiments on High-temperature Phase Equilibria – The EU Project Advance
Industrial Applications of Thermodynamic and Kinetics Modeling
Interaction of Moving Grain Boundaries with Solutes in Alloys
Materials Property Databases Developed by the CALPHAD Approach and Their Applications in Materials Design
Measurements of Thermophysical Properties of Metals and Alloys as Input for Computational Thermodynamics
On the Intrinsic Alloying Behavior in the A and M Sublattices of MAX Phases
On the Next Generation of Thermodynamic CALPHAD Databases
Phase Equilibria and Interfacial Migration in Stressed Solids
Phase Equilibria in High-entropy and Complex-concentrated Alloys
Selected Observations of Microstructural Development in Additively Manufactured Metallic Alloys
The Application of Metastable Equilibria in the Analysis of Transformation Behavior
The Third Generation of CALPHAD Descriptions: Case Studies on Al-C and W-C
Thermodynamic Assessment of the Fe-B and Fe-B-C- Systems
Thermodynamic Modeling of Precipitates of Topologically Close-packed Phases
Thermodynamics at Equilibrium and Non-equilibrium – Genomic Tools for Materials Design
Tomorrow fcc Ordering Model
William Hume-Rothery Award Lecture: Phase Diagrams, Computational Thermodynamics and CALPHAD

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