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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

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

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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