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Meeting MS&T22: Materials Science & Technology
Symposium Dislocations in Ceramics: Processing, Structure, Mechanics, and Functionality
Presentation Title In Situ Observation of Fracture Dominated by a Single Dislocation and Its Governing Mechanics
Author(s) Takashi Sumigawa
On-Site Speaker (Planned) Takashi Sumigawa
Abstract Scope 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.
Proceedings Inclusion? Undecided


Atomistic and Multiscale Computational Analysis of the Connection between Dislocation Slip and Ionic Transport in Plastically Deformed Oxides
Charged Dislocations in Ionic Ceramics: Equilibrium and Kinetics
Conceptual Framework for Dislocation Mechanics in Ceramics
Dislocation-Modified Photoelectric Properties of Oxide Ceramics
Effects of Light Illumination on the Dislocation-mediated Plasticity in Single-crystalline ZnO
In Situ Observation of Fracture Dominated by a Single Dislocation and Its Governing Mechanics
Understanding and Engineering Dislocations in Oxides at Room Temperature

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