|About this Abstract
|MS&T21: Materials Science & Technology
|Probing Defect Properties and Behavior under Mechanical Deformation and Extreme Conditions
|Survey of Defect Absorption Effects in Grain Boundaries
|Larissa M. Woryk, David Srolovitz, Jian Han
|On-Site Speaker (Planned)
|Larissa M. Woryk
Defect absorption at grain boundaries requires their accommodation within the boundary, which can occur through various mechanisms. We present a variety of cases of dislocations and dislocation loops to highlight similarities and differences in grain boundary response to absorption. We examine interstitial and vacancy loops of various sizes and allowed Burgers vectors (within the same family) and straight dislocations with various allowed Burgers vectors and line directions in multiple grain boundaries, as Burgers vectors within the same family each have a different orientation relative to the grain boundary, and different grain boundaries have different allowed disconnections and accessible metastable states. We characterize the absorption response in terms of disconnections and metastable grain boundary states produced by the decomposition of the initial defect Burgers vectors.