|About this Abstract
|MS&T22: Materials Science & Technology
|Dislocations in Ceramics: Processing, Structure, Mechanics, and Functionality
|In Situ Observation of Fracture Dominated by a Single Dislocation and Its Governing Mechanics
|On-Site Speaker (Planned)
A dislocation has a strain concentration field on the atomic scale. As material dimensions are reduced to the nano-scale, a dislocation may be the starting point of fracture, since there are no defects larger than the dislocation in the interior. In this talk, I present the results of experiments on fracture initiated from a single dislocation. Controlled edge dislocations were placed in the tiny specimens, and the fracture behavior and its criterion were obtained by loading tests in a transmission electron microscope. I explain the dominant factors of the fracture obtained from the experimental results with the aid of atomic-level simulations.