Microstructure and properties of Mg-Al binary alloys

作     者：ZHENG Wei-chao LI Shuang-shou TANG Bin ZENG Da-ben 

作者机构：Fundamental Industry Training Center Department of Mechanical Engineering Fundamental Industry Training Center Department of Engineering MechanicsTsinghua University Beijing 100084 China Department of Mechanical Engineering 

出 版 物：《China Foundry》 (中国铸造（英文版）)

年 卷 期：2006年第3卷第4期

页      面：270-274页

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：Mg-Al binary alloys grain size α-Mg dendrite eutectic microstructure hot cracking 

摘      要：The effects of different amounts of added Al, ranging from 1 % to 9 %, on the microstructure and properties of Mg-Al binary alloys were investigated. The results showed that when the amount of added Al is less than 5%, the grain size of the Mg-Al binary alloys decreases dramatically from 3 097 μm to 151 μm with increasing addition of Al. Further addition of Al up to 9% makes the grain size decrease slowly to 111 μm. The α-Mg dendrite arms are also refined. Increasing the amount of added Al decreases the hot cracking susceptibility of the Mg-Al binary alloys remarkably, and enhances the micro-hardness of the α-Mg matrix.