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Strain rate sensitivity of dislocation nucleation from grain boundary

粒界からの転位核生成に関するひずみ速度感受性

Tirtom, I.; Wang, Y.*; 下川 智嗣*; 尾方 成信*

Tirtom, I.; Wang, Y.*; Shimokawa, Tomotsugu*; Ogata, Shigenobu*

Defect behavior can be classified as nucleation and mobility. In order to estimate plastic deformation behavior of nanocrystal materials, correct estimation of dislocation nucleation rate from the grain boundary at elevated temperatures is essential. However, it is not measurable within the capability of available experimental methods. And also with rare event characteristic, it is mostly out of the time span of classical MD. Therefore, objective of this study is to estimate dislocation nucleation from grain boundary at finite temperature by established consequent calculations of classical MD, NEB and constrained MD methods.

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