Core structure and Peierls stress of the 90° dislocation and the 60° dislocation in aluminum investigated by the fully discrete Peierls model
Hao Xiang(向浩)1, Rui Wang(王锐)1, Feng-Lin Deng(邓凤麟)2,3, and Shao-Feng Wang(王少峰)1,†
1 Department of Physics and Institute for Structure and Function, Chongqing University, Chongqing 401331, China; 2 CAS Key Laboratory of Magnetic Materials and Devices, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China; 3 Zhejiang Province Key Laboratory of Magnetic Materials and Application Technology, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China
Abstract The core structure, Peierls stress and core energy, etc. are comprehensively investigated for the dislocation and the dislocation in metal aluminum using the fully discrete Peierls model, and in particular thermal effects are included for temperature range K. For the dislocation, the core clearly dissociates into two partial dislocations with the separating distance Å, and the Peierls stress is very small kPa. The nearly vanishing Peierls stress results from the large characteristic width and a small step length of the dislocation. The dislocation dissociates into and partial dislocations with the separating distance Å. The Peierls stress of the dislocation grows up from MPa to MPa as the temperature increases from K to K. Temperature influence on the core structures is weak for both the dislocation and the dislocation. The core structures theoretically predicted at K are also confirmed by the first principle simulations.
Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 11874093 and 11974062).
Corresponding Authors:
Shao-Feng Wang
E-mail: sfwang@cqu.edu.cn
Cite this article:
Hao Xiang(向浩), Rui Wang(王锐), Feng-Lin Deng(邓凤麟), and Shao-Feng Wang(王少峰) Core structure and Peierls stress of the 90° dislocation and the 60° dislocation in aluminum investigated by the fully discrete Peierls model 2022 Chin. Phys. B 31 086104
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