The plausibility of dislocation slip on {-12-11} planes in Mg

SCRIPTA MATERIALIA

卷:156

Article

Zhang, Jiadong^1,2  Zhang, Yong^3,4  El-Awady, Jaafar A.⁵  Tang, Yizhe^1,2 

[1] Shanghai Univ, Shanghai Inst Appl Math & Mech, Shanghai 200072, Peoples R China

[2] Shanghai Univ, Shanghai Key Lab Mech Energy Engn, Shanghai 200444, Peoples R China

[3] Nanjing Univ Sci & Technol, Herbert Gleiter Inst Nanosci, Nanjing 210094, Jiangsu, Peoples R China

[4] Nanjing Univ Sci & Technol, Sch Mat Sci & Engn, Nanjing 210094, Jiangsu, Peoples R China

[5] Johns Hopkins Univ, Dept Mech Engn, Whiting Sch Engn, Baltimore, MD 21218 USA

关键词: < c plus a >;    dislocations;    Cross-slip;    Hexagonal close-packed;    Magnesium;    Non-basal slip;   

DOI  :  10.1016/j.scriptamat.2018.07.007

来源: Elsevier

【 摘 要 】

Here, the slip behavior of screw dislocations on first-order and second-order pyramidal planes in Mg are systematically investigated. Slip or/and cross-slip on six low Miller-Bravais-index planes, including two new {-12-11} planes that have hitherto not been considered possible, are all observed. This new slip system has a low Peierls stress and generalized stacking fault energy, suggesting that it might be an easy mode. The active cross-slip and new slip system provide new insight into the plasticity mechanisms of Mg. (C) 2018 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

【 授权许可】

Free