初始织构对AZ31镁合金室温拉伸变形行为的影响  

Effect of Initial Texture on Tensile Plastic Behavior of AZ31 Alloy at Room Temperature

作　　者：庄二鹏 邓丽萍[1] 周海宽[1] 汪炳叔[2] 

机构地区：[1]福州大学机械工程及自动化学院,福州福建350108 [2]福州大学材料科学与工程学院,福州福建350108

出　　处：《热加工工艺》2016年第24期118-121,125,共5页Hot Working Technology

基　　金：国家自然科学基金项目(51301040);福建省教育厅科技项目(JA15072)

摘　　要：研究了初始织构对AZ31镁合金室温拉伸变形的影响。选择具有很强基面织构的商用AZ31热轧板材,设计了三类不同初始织构的拉伸样品,取其拉伸轴分别与板材方向成0°、45°和90°,分别命名为0ND、45ND和90ND样品。利用电子背散射衍射技术,定量表征样品在拉伸变形过程的组织及织构演变。研究表明:在室温拉伸变形过程中,0ND样品主要以{1012}拉伸孪生为主,45ND样品主要以{1012}孪生和滑移为主,而90ND样品主要以滑移为主。The effects of initial texture on the tensile plastic behavior of AZ31 magnesium alloy were investigated. A hnt-rolled AZ31 magnesium alloy sheet with strong basal plane texture was chosen. Three kinds of samples for the tensile deformation were cut from the sheet with their tensile axis aligned 0°, 45° and 90° to the normal direction （ND） of the rolled sheet, named as 0ND, 45ND and 90ND samples, respectively. The microstructure and texture evolution during tensile deformation were quantitatively characterized using electron backscattering diffraction （EBSD） technique. The results show that in room temperature tensile process, for 0ND sample, {1012} twinning is the dominated deformation mechanism, while for 45ND sample, both {1012} twinning and slip are the main deformation mechanisms. For 90ND sample, however, slip is the dominated deformation mechanism.

关 键 词：镁合金 初始织构 EBSD 孪生 各向异性 

分 类 号：TG146.2[一般工业技术—材料科学与工程]