不同冷轧路径下ZX21镁合金板材织构及力学性能调控机理  

Tailor mechanism of texture and mechanical properties in ZX21 alloy sheets with different cold rolling paths

作　　者：谭超兰 黄光杰[1] 黄信德 曹玲飞[1] 曹宇 张成行 李伟[1] TAN Chao-lan;HUANG Guang-jie;HUANG Xin-de;CAO Ling-fei;CAO Yu;ZHANG Cheng-hang;LI Wei(College of Materials Science and Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学材料科学与工程学院,重庆400044

出　　处：《中国有色金属学报》2018年第10期1949-1961,共13页The Chinese Journal of Nonferrous Metals

基　　金：国家自然科学基金资助项目(51671040)~~

摘　　要：研究轧制路径对ZX21镁合金板材织构分布和屈服各向异性的影响。结果表明:单向轧制板材形变织构为双峰基面织构,退火后呈现出垂直于冷轧方向分布的非基面双峰的织构特征。再结晶织构的分布与晶粒的定向形核和选择性长大有关,多向轧制可弱化晶粒取向分布的方向性,其晶粒尺寸相比单向轧制有所减小,退火后形成均匀分布的圈状织构,大幅降低沿轧面各个方向拉伸时基面滑移的施密特因子差异,改善板面内的力学性能各向异性,提高板材的成型性。The influence of cold rolling path on texture and mechanical anisotropy in ZX21 alloy sheets was investigated.The results show that double peaks appear in the basal texture after unidirectional rolling,which subsequently change into off-basal texture with double peaks distributing perpendicular to the cold rolling path after annealing.The distribution of recrystallization texture is associated with the preferential nucleation and growth of recrystallized grains.The multi-directional rolling can weaken the preferential orientation of grains,whilst a circle-like texture distribution is obtained with the decrease of grain size after annealing.The yielding anisotropy is optimized by decreasing the difference of Schmid factor when tensioning along various directions and hence improves the mechanical property of sheets.

关 键 词：镁合金 轧制路径 织构 各向异性 

分 类 号：TG146.2[一般工业技术—材料科学与工程]