Microstructure and tensile behavior of hot extruded AZ91 alloys at room temperature

作     者：Yuanyuan Li, Datong Zhang, Ying Liu, Yan Long, and Weiping ChenCollege of Mechanical Engineering, South China University of Technology Guangzhou 510640, China 

作者机构：Coll. of Mech. Eng. South China Univ. of Technol. Guangzhou 510640 China 

出 版 物：《Journal of University of Science and Technology Beijing》 (北京科技大学学报（英文版）)

年 卷 期：2002年第9卷第5期

页      面：352-355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）] 

主　　题：magnesium alloy hot extrusion microstructure tensile behavior 

摘      要：AZ91 alloys were prepared by hot extrusion and its microstructure and tensile behavior at room temperature were investigated. Compared to as-cast ingot, the grain size of hot-extruded material is more refined, the intermetallic phase MgnAl12 is broken and dispersed discontinuously. Both strength and elongation of AZ91 are improved by hot extrusion. Tensile behavior and fracture surface of the experimental material were studied. Due to the change in microstructure, the fracture mechanism of extruded material is different from that of as-cast ingot, the latter is mainly a brittle fracture. Ductile fracture plays a role in hot-extruded AZ91 failure at room temperature.