AZ61镁合金热压缩变形组织研究  

Compressing deformation and microstructure of AZ61 magnesium alloy

作　　者：李权 程仁菊 姜山 刘文君 曾斌 蒋显全 

机构地区：[1]重庆市科学技术研究院,重庆400123

出　　处：《材料保护》2013年第S1期45-47,共3页Materials Protection

基　　金：国家科技支撑计划项目(2011BAE22B04);国家科技支撑计划项目(2011BAE22B03);重庆市自然科学基金一般项目(CSTC2012jjA1788);重庆市科技攻关项目(cstc2012ggB50003);国际合作项目(2011DFR50950-02)

摘　　要：在gleeble 1500D热模拟试验机上以应变速率为0.01 s-1和1s-1,变形温度为350℃和400℃,对AZ61镁合金热压缩变形,并对变形试样显微组织进行了研究。结果表明:热变形过程中发生了不同程度的动态再结晶,得到不完全再结晶组织。变形温度和应变速率对再结晶程度、再结晶晶粒尺寸均匀性有明显影响;以较低的温度配合高的应变速率,热变形后发生再结晶晶粒均匀细小;变形温度高且应变速率高时,发生动态再结晶的区域变小,再结晶晶粒尺寸偏大且极不均匀,低温高速热变形有利于获得均匀细小的再结晶组织。Hot compression tests of AZ61 magnesium alloy were performed on gleeble1500D at strain rate ranged in 0.01~1s-1 and deformation temperature 350~400 ℃.The results show that the flow stress and microstructures strongly depend on the deformation temperature and the strain rate.When the temperature was reduced and the strain rate was enhanced,the area after dynamic recrystallization was enhanced,and the average dynamically recrystallied grain size reduce.But the dynamically recrystallied grain size was not well-proportioned.In this paper the 350 ℃×1s-1 was suggested.

关 键 词：AZ61镁合金 热压缩 显微组织 动态再结晶 

分 类 号：TG146.22[一般工业技术—材料科学与工程]