| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Deformation and Transitions at Grain Boundaries VII
|
| Presentation Title |
Study on Effect of Symmetric Tilt Grain Boundaries on Twin Nucleation in Ti |
| Author(s) |
Deepesh Giri, Christopher Barrett, Haitham El Kadiri |
| On-Site Speaker (Planned) |
Deepesh Giri |
| Abstract Scope |
Determining a favorable site for nucleation of a twin variant in Hexagonal Close Packed (HCP) metals remains a daunting task. Site-specific twin nucleation is sensitive to the prior atomic structure of the lattice and hence twin embryos form in regions where the lattice transformation energy is minimum. This work probes the effects of symmetric tilt grain boundaries (STGBs) in nucleation of twin embryos in HCP metals. We use Molecular Statics (MS) simulations to explore the roles of [10-10] and [1-210] STGBs during twin formation in Ti. Twin nucleation process is affected by the presence of grain boundaries and defects like vacancies and dislocations. We use a noble method called Nudged Elastic Band (NEB) method to consider these factors and quantify the twinning phenomena. This allows direct comparisons between various cases with respect to twin nucleation and hence provides a measure of the material plasticity. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |