(1. 哈尔滨工程大学 机电工程学院, 哈尔滨 150001;
2. 哈尔滨理工大学 材料科学与工程学院, 哈尔滨 150080)
摘 要: 采用应变诱发方法制备了AZ91D镁合金半固态材料。 考察了变形率、 温度、 保温时间对固相体积分数、组织形态以及晶粒尺寸的影响。 结果表明： 在冷变形条件下， 于570℃保温一定时间后， 可制备出固相体积分数最小达55%的镁合金半固态材料。 分析讨论了AZ91D镁合金半固态组织的形成机理。在热处理过程中， 组织发生再结晶， 而冷变形程度对再结晶的组织有显著影响。
关键字: AZ91D； 冷变形； 应变诱发； 半固态； 微观组织
AZ91D magnesium alloy by SIMA process
（1. Mechanical and Electrical Engineering College,
Harbin Engineering University, Harbin 150001, China;
2. Department of Materials Science and Engineering,
Harbin University of Science and Technology, Harbin 150080, China）
Abstract:The SIMA(strain-induced melt activation) process used to prepare the semi-solid material of AZ91D magnesium alloy was proposed, and the influences of cold working ratio, temperature and holding time on solid volume fraction, grain size and shape were investigated. The results show that, under the cold working condition, the SIMA process can produce the semi-solid material of magnesium alloy with minimum solid volume fraction of 55% after being held at 570℃ for definite time. The forming mechanism of semi-solid material of AZ91D magnesium alloy was analyzed. During the heat treatment, the recrystalization can occur, and the influence of re-crystallized structures is pronounced by cold working ratio.
Key words: AZ91D; cold working; SIMA; semi-solid; microstructure
