| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior at the Nanoscale V
|
| Presentation Title |
Modeling Deformation Twinning in BCC Transition Metals |
| Author(s) |
Anik H M Faisal, Christopher R Weinberger |
| On-Site Speaker (Planned) |
Anik H M Faisal |
| Abstract Scope |
Deformation twinning is an important mode of deformation mechanism in BCC transition metals under high rate and low temperature conditions. Atomistic simulations of twin structures in BCC transition metals reveal two types of twin structure: conventional reflection twin structure and isosceles twin structure. In some cases, the conventional reflection twin structure is energetically favorable while in other cases, the isosceles structure is favorable. In this work, energetics of these twin structures is examined with the inclusion of interaction between dissociating partial dislocations and generalized stacking fault energy using both MD and DFT calculations. The energetics of nucleation of both twin structures coupled with the rate and temperature dependence of twin formation provide basis for developing multiscale models of deformation twinning in BCC metals. This model will offer useful insights into understanding multiscale deformation phenomena that initiate at nanoscale and mechanical properties of bulk BCC transition metals. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |