Loading direction dependence of asymmetric response of pyramidal slip in rolled AZ31 magnesium alloy

作     者：Yuzhi Zhu Dewen Hou Kaixuan Chen Zidong Wang 

作者机构：School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijing 100083China Micron School of Materials Science and EngineeringBoise State UniversityBoiseID 83725United States Center for Nanoscale MaterialsArgonne National LaboratoryLemontIL 60439United States 

出 版 物：《Journal of Magnesium and Alloys》 (镁合金学报（英文）)

年 卷 期：2023年第11卷第10期

页      面：3634-3641页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the Bejing Municipal Natural Science Foundation (No.2214072) the Interdisciplinary Research Project for Young Teachers of USTB (Fundamental Research Funds for the Central Universities) (FRF-IDRY-20-034) the Office of China Postdoctoral Council under Award No.YJ20200248 

主　　题：Magnesium pyramidal slip Asymmetry Cross-slip 

摘      要：Textured magnesium alloys usually exhibit anisotropic mechanical behavior due to the asymmetric activation of different twinning and slipping *** work focuses on the pyramidal slip responses of rolled AZ31 magnesium alloy under two loading conditions,compressive and tensile loading along the normal *** the condition where the compressive loading direction is closely parallel to the c-axis of the unit cell,tensile twinning and basal slips are prohibited, dislocations then active and tend to accumulate at grain boundaries and form dislocation ***,these dislocations exhibit zigzag morphologies,which result from the cross-slip from {10■1} first-order pyramidal plane to {11■2} second-order pyramidal plane,then back to {10■1} first-order pyramidal *** the condition where tensile twins are prevalent,{10■1} first-order and {11■2} second-order pyramidal dislocations are favorable to be *** types of dislocations behave climb-like dissociations onto the basal plane,forming zigzag dislocations.