About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation and Transitions at Grain Boundaries VII
|
Presentation Title |
Vacancy-mediated Solute/Twin Boundary Interactions in HCP Alloys |
Author(s) |
Mohammad Shahriar Hooshmand, Maryam Ghazisaeidi |
On-Site Speaker (Planned) |
Mohammad Shahriar Hooshmand |
Abstract Scope |
Twinning is an important mechanism during the plastic deformation of materials with hexagonal- close-packed crystal structure. Strength and formability are critical properties for this family of structural materials and can consequently be improved by controlling twin nucleation and growth. Here, we study the effect of substitutional alloying elements on strain rate and temperature dependence of twin growth in Mg alloys. Without using any fitting parameters, we derive an analytical model which takes atomic scale calculated parameters as input and predicts the equilibrium concentration of segregated solutes and strengthening due to solute-twin interactions. Our findings shed light on the underlying mechanisms governing the effect of substitutional solutes transport through vacancy-mediated diffusion to the twin boundary and the plastic deformation of hcp alloys. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |