About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Progress Toward Mechanisms, Thermodynamics, and Kinetics of Phase Transformations: An MPMD/SMD Symposium Honoring John H Perepezko
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| Presentation Title |
The role of plastic deformation on chemical mixing and phase evolution |
| Author(s) |
Pascal M. Bellon, Robert S. Averback, Yinon Ashkenazy |
| On-Site Speaker (Planned) |
Pascal M. Bellon |
| Abstract Scope |
Plastic deformation induced by rolling and high-energy ball milling can force the mixing of distinct chemical elements, even immiscible ones. Building on the concept of Richardson's pairs, atomistic simulations and experiments reveal that this forced mixing is generally superdiffusive. As a consequence, at intermediate to low homologous temperatures, where thermal recovery is moderate to negligible, sustained deformation can stabilize non-equilibrium phases and nanostructures. In some simple alloys, phase stability and phase coexistence driven by plastic deformation at low temperatures can be approximated by an effective temperature. In many practical situations, e.g., during sliding wear and wire drawing, deformation-stabilized nanostructures couple the chemical field with structural defects, thus generating so-called driven defect-phases. It is shown that controlling the selection of these driven defect-phases may improve service properties, such as wear resistance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Computational Materials Science & Engineering, Phase Transformations, Shaping and Forming |