About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Defects and Interfaces: Modeling and Experiments
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Presentation Title |
A Self-consistent Solution for Diffusion Creep Behavior of Multiphase Polycrystalline Materials |
Author(s) |
Heechen E. Cho |
On-Site Speaker (Planned) |
Heechen E. Cho |
Abstract Scope |
I present the development of a two-dimensional self-consistent solution for the lattice diffusional creep in a multiphase polycrystalline mixture. First, I find the stress state of a single ellipse (grain) using Eshelby’s inclusion theory that relates a surrounding matrix to a local grain where the grain-matrix viscosity contrast exists. Based on the stress state of the grain from this theory, the diffusion creep theory is then applied to determine the viscosity of the grain. Fick’s laws are solved to determine the creep rate of the grain (Cho & Karato, 2022). This single-grain solution is extended to a polycrystal through the self-consistent method. The surrounding matrix is assumed to have self-consistently homogenized properties of all constituent grains. This approach allows investigation of the mean-field diffusion creep behavior of a multiphase aggregate. It is crucial to consider the grain morphology when multiphase polycrystalline material deforms by the diffusional creep.
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Proceedings Inclusion? |
Planned: |
Keywords |
Composites, Modeling and Simulation, High-Temperature Materials |