Irradiation-enhanced twin boundary migration in BCC Fe |
| |
| Authors: | Dingkun Song Xiaoguai Li Zhaohui Jin |
| |
| Affiliation: | 1. State Key Laboratory for Turbulence and Complex System, Department of Mechanics and Engineering Science, College of Engineering, Peking University, Beijing, P.R. China;2. School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China |
| |
| Abstract: | The effects of irradiation on twin boundary migration in BCC Fe are studied by atomistic simulations. It is found that under the applied shear strain–stress, thermal spikes may create twinning dislocation loops (TDLs) at twin boundaries, so triggering twinning. Irradiation-generated clusters of point defect at twin boundaries may act as sources to nucleate TDLs. When a vacancy loop intersects with a twin boundary, the critical stress to activate a TDL is less than half of that required for a defect-free twin boundary. |
| |
| Keywords: | irradiation defects dislocation nucleation twinning iron molecular dynamics |
|
|
