文献类型：期刊文章

作　　者：蓝永庭[1,2] 钟献词[3] 权高峰[4] 蔺若成[5] 张克实[1]

机构地区：[1]广西大学工程防灾与结构安全重点实验室,南宁530004 [2]广西科技大学职业技术教育学院,柳州545006 [3]广西大学数学与信息科学学院,南宁530004 [4]西南交通大学材料科学与工程学院,成都610031 [5]大连海事大学交通运输装备与海洋工程学院,大连116026

出　　处：《Transactions of Nonferrous Metals Society of China》

基　　金：Projects(11272094,11072064)supported by the National Natural Science Foundation of China;Project(LGZX201101)supported by the Laboratory Center of Guangxi Science and Technology,China;Project(1074023)supported by the Science Foundation of Guangxi University of Science&Technology,China

年　　份：2015

卷　　号：25

期　　号：1

起止页码：249-260

语　　种：中文

收录情况：AJ、CAS、CSA、CSA-PROQEUST、CSCD、CSCD2015_2016、EBSCO、EI、IC、INSPEC、JST、SCI(收录号：WOS:000349763900029)、SCI-EXPANDED(收录号：WOS:000349763900029)、SCIE、SCOPUS、WOS、ZGKJHX、普通刊

摘　　要：To investigate the deformation twinning and the plastic anisotropy of the hexagonal-close-packed（HCP） single crystal, the crystal plastic constitutive model including slip and twinning deformation was established with finite element method based on crystal plasticity theory. The model was verified by test data. Newton-Raphson iteration method was developed with the stress components directly as the basic variables of iteration. The plastic deformation behavior of single crystal AZ31 alloy was analyzed numerically under monotonic tension and compression, respectively, in four different strain paths（i.e. along 〈2110〉, 〈 0110〉, 〈0001〉 and 〈0111〉） with this model. The stress-strain curves were obtained in the above paths. The numerical calculation results show that this crystal model is feasible to predict the activity of slip/twinning system and to describe the number of active twin variants, the types of dominant twin variants and twin intersection. Due to the polar nature of mechanical twinning in inelastic deformation of the material, the plastic behavior of the single crystal material is demonstrated to be notably anisotropic and high asymmetry.

关 键 词：AZ31 magnesium alloy  constitutive model  single crystal  deformation twin  twin variant  twin intersection  

分 类 号：TG146.22[材料类]