| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Defect and Phase Transformation Pathway Engineering for Desired Microstructures
|
| Presentation Title |
New Insights into The Effect of Solutes on Twinning in Ti Alloys |
| Author(s) |
Shahriar Hooshmand, Yan Chong, Ruopeng Zhang, Andrew Minor, Mark Asta |
| On-Site Speaker (Planned) |
Shahriar Hooshmand |
| Abstract Scope |
Ti alloys attract wide attention due to the unique combination of low density, high strength and corrosion resistance. Twinning is one of the essential plastic deformation mechanisms in Ti and other HCP materials, which impacts the mechanical properties. In this work, we systematically study various common twin modes activated under c-axis tension and compression using atomistic simulations. In agreement with our recent experiments, we find that addition of solutes to the elemental alpha-Ti can alternate the deformation twinning behavior and promote new twin modes. Density functional theory and molecular dynamics simulations are employed to investigate the mechanisms underlying the anomalous behavior of certain twins in presence of solutes. We also provide a comprehensive and quantitative analysis of thermodynamic and kinetic feasibility of solute transport around various twin boundaries. These insights can shed light on further understanding of complicated twinning behavior in Ti alloys and suggest novel strategies for materials design. |
| Proceedings Inclusion? |
Planned: |