Grain refinement and plastic formability of Mg-14Li-1Al alloy

作     者：蒋斌 殷恒梅 李瑞红 高亮 

作者机构：National Engineering Research Center for Magnesium AlloysChongqing University College of Materials Science and EngineeringChongqing University 

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

年 卷 期：2010年第20卷第B7期

页      面：503-507页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 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] 0813[工学-建筑学] 0703[理学-化学] 0814[工学-土木工程] 0702[理学-物理学] 

基　　金：Project(50604020)supported by the National Natural Science Foundation of China Project(2007CB613706)supported by the National Basic Research Program of China Project(2009AA03Z507)supported by the National High-tech Research and Development Program of China 

主　　题：Al合金 晶粒细化 塑料成形 最佳加入量 中间合金 退火温度 晶粒尺寸 微观结构 

摘      要：Al-5Ti-1B master alloy was added into Mg-14Li-1Al(LA141)alloy and then LA141 sheets were prepared by extrusion and cold rolling.The effect of the addition level of Al-5Ti-1B master alloy on the grain size of LA141 alloy was investigated as well as the effects of the total reduction of cold rolling and the annealing temperature on microstructure,mechanical properties and plastic formability of the LA141 sheets.The results show that the optimal addition level of Al-5Ti-1B master alloy into LA141 alloy is 1.25%(mass fraction)and LA141 alloy has the finest grains.With the increase of the total reduction of cold rolling,the grains of the as-rolled LA141 sheets were flattened gradually.A proper anneal temperature of 200℃ is obtained for the cold rolled LA141 sheets. Under this condition,microstructure of the LA141 sheets consists of fine and uniform equiaxed grains and has higher Erichsen cupping index(IE).