异步轧制对Mg_(98.5)Zn_(0.5)Y_1合金晶粒和力学性能的影响  

Effect of Asynchronous Rolling on Grain and Mechanical Properties of Mg_(98.5)Zn_(0.5)Y_1 Alloy

作　　者：徐志超[1] 史庆南[1] 冯中学 杨应湘 

机构地区：[1]昆明理工大学材料科学与工程学院,云南昆明650093 [2]云南省新材料制备与加工重点试验室,云南昆明650000

出　　处：《热加工工艺》2017年第5期41-44,共4页Hot Working Technology

基　　金：云南省自然科学研究基金资助项目(KKSY201351055);云南省教育厅科学研究基金研究生项目(2013J058);教育部博士点基金项目(20135314110003)

摘　　要：试验研究了异步轧制工艺参数对Mg_(98.5)Zn_(0.5)Y_1合金力学性能的影响,探讨了异步轧制工艺参数对合金晶粒细化及其强化机制的影响。结果表明:随着轧制道次的增加,材料的屈服强度和抗拉强度增加,最高可达到325 MPa;异步轧制产生的剪切应变能有效促进压缩孪晶和晶粒内部及晶粒间的相互作用,产生动态再结晶,从而导致大晶粒的内部转变为许多小亚晶,达到细化晶粒,提高镁合金力学性能的目的。The effects of the asynchronous rolling process parameters on the mechanical properties of Mg98.5Zn0.5Y1 alloy were studied by experiments. The effects of process parameters on the grain refinement and strengthening mechanism of the alloy were discussed. The results show that with the increase of rolling pass, the yield strength and tensile strength of the material increase, and the maximum can reach 325 MPa; shear strain produced by the asynchronous rolling can effectively promote the interaction between the compression twin and the grain interior and the intergranule, and produces dynamic recrystallization. It causes that the internal of large grains transforms into many small sub-grain, which can reach purpose of grain refinement and improvment of the mechanical properties of magnesium alloy.

关 键 词：异步轧制 镁合金 晶粒 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程] TG335.19[金属学及工艺—金属材料]