| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation Induced Microstructural Modification
|
| Presentation Title |
Phase Evolution in Two-phase Alloys during Severe Plastic Deformation |
| Author(s) |
Nirab Pant, Nisha Verma, Yinon Ashkenazy, Pascal M. Bellon, Robert S. Averback |
| On-Site Speaker (Planned) |
Pascal M. Bellon |
| Abstract Scope |
Phase evolution in FCC metals with strongly interacting alloy components during severe plastic deformation is investigated using molecular dynamics simulations. Specifically, we study the alloy microstructure in steady state, nucleation and growth of precipitates in supersaturated alloys, and the decomposition of precipitates in undersaturated alloys. The results are compared to a modified effective temperature model. Key observations are nucleation and growth of precipitates during SPD at a temperature of 100 K; Gibbs-Thomson-like behavior relating solubility to precipitate size under steady-state shearing; a direct relationship between the effective temperature and the shear modulus; and the importance of cluster agglomeration in precipitate growth. The study also reveals that the mechanisms of forced chemical mixing depends on precipitate size, adding complications to effective temperature models in inhomogeneous systems. The simulations are shown to provide good semiquantitative agreement with experimental findings reported in the literature. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Phase Transformations, Computational Materials Science & Engineering |