Tensile properties of AZ31 sheet/bar and effects of texture

作     者：周清 G.ITOH Y.MOTOHASHI 

作者机构：College of Mechanical and Electrical EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China Department of Mechanical EngineeringCollege of EngineeringIbaraki UniversityHitachi 316-8511Japan Research Center For SuperplasticityIbaraki UniversityHitachi 316-8511Japan 

出 版 物：《中国有色金属学会会刊：英文版》 (Transactions of Nonferrous Metals Society of China)

年 卷 期：2006年第16卷第A03期

页      面：1741-1745页

核心收录：

学科分类：0806[工学-冶金工程] 08[工学] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0813[工学-建筑学] 0814[工学-土木工程] 0702[理学-物理学] 

主　　题：镁合金 机械性能 金属变形 张力 应变分析 

摘      要：For understanding the deformation mechanism of AZ31 Mg alloy, two kinds of specimen, hot-rolled sheet and extruded bar were tested in tension at room temperature. Relatively small grain sizes ranging from 32 to 8.7μm are obtained by annealing at several temperatures. And then they were further cold-rolled with rolling angles of 0? 45?and 90? which is the angle between the rolling and the longitude direction of as-received specimen, and annealed at a temperature in recrystallization field. The yield stress were found from the stress—strain curve. The grain size dependence of the yield stress is found not in agreement with the Hall-Petch relationship. The texture of (0002) pole figure of each kind of specimen was tested by X-ray diffractometer. The specimen with strong basal texture shows large yield stress and low work-hardening rate, while the specimen with weak basal texture shows low yield stress and rapid work-hardening rate. These results are interpreted by the slip system activated in the different textures. A combined slip system was used to interpret the yield stress variation with the texture and the deformation mechanism was discussed.