摘要
采用粉末冶金法制备超细晶AZ31镁合金材料,并对其微观组织形貌及相成分进行研究;利用单向拉伸试验研究了该材料在不同条件下超塑性变形。结果表明,采用球磨、冷压制坯和热挤压法可获得晶粒尺寸在1微米以下的超细晶组织,该材料在250℃,1×10-3s-1的应变速率条件下获得了最大伸长率,基本达到超塑性状态。
Ultra-fine grain AZ31 alloy bars were fabricated by power metallurgy process, and the microstructure and phase composition were also researched. The superplastic deformation was studied by simple tension test. According to the results, AZ31 alloy with the grain size under 11υm was prepared by the process of high energy ball milling, cold compacting and hot extrusion. The superplastic deformation was achieved under the temperature of 250℃ and strain rate of 1×10^-3S^-1
出处
《热加工工艺》
CSCD
北大核心
2013年第12期84-86,92,共4页
Hot Working Technology
作者简介
林莺莺（1981-），女，浙江东阳人，博士，主要研究方向：金属材料塑性成形；电话：010-62496678；E-mail：linyingyingl@sina．com
