About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
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Symposium
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Ultrafine-grained and Heterostructured Materials (UFGH XII)
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Presentation Title |
A Perspective on Microstructural and Phase Evolution in Alloys during Extended Plastic Deformation |
Author(s) |
Pascal M. Bellon, Robert S. Averback, Fuzeng Ren, Nirab Pant, Yinon Ashkenazy |
On-Site Speaker (Planned) |
Pascal M. Bellon |
Abstract Scope |
Materials in service and during processing are often subjected to plastic deformation, resulting in grain refinement and forced chemical mixing. For multi-phase metallic alloys, simple geometric models and atomistic simulations suggest that there exist two distinctive regimes in these materials’ evolution during deformation. At low strains, evolutions are often dominated by the kinetic roughening of interfaces, which results from the superdiffusive transport of matter in sheared crystals. At high strains and at temperatures where thermal diffusion is sluggish, on the other hand, shearing-induced forced atomic mixing dominates these evolutions, resulting in significantly enhanced solubility. Distinguishing these two regimes is shown to provide a convenient framework for rationalizing and analyzing recent experiments and simulations on wear of layered structures in Cu-Au and Cu-Ag alloys in the low strain regime, and nonequilibrium phase co-existence and self-organization in highly immiscible or reactive alloy systems, such as Cu-Nb, in the high strain regime. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Modeling and Simulation, Phase Transformations |