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

来源期刊：中国有色金属学报(英文版)2010年增刊第2期

论文作者：蒋斌 殷恒梅 李瑞红 高亮

文章页码：503 - 507

Key words：Mg-14Li-1Al alloy; sheet; grain refinement; plasticity formability

Abstract: 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 °C 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).

基金信息：the National Natural Science Foundation of China
the National Basic Research Program of China