超声对AZ80镁合金显微组织演化及力学性能的影响  

Ultrasonic Effects on Microstructure Evolution and Mechanical Properties of AZ80 Magnesium Alloy

作　　者：薛寒松[1,2] 李迪[1] 杨刚[1] 张丁非[1,2] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400044 [2]国家镁合金材料工程技术研究中心,重庆400044

出　　处：《稀有金属材料与工程》2016年第6期1401-1405,共5页Rare Metal Materials and Engineering

摘　　要：研究超声处理对AZ80镁合金微观结构演化及力学性能的影响。研究表明,经超声处理后,初生α-Mg相由粗大的树枝晶变为细小的球状等轴晶,且β-Mg_（17）Al_（12）相明显细化,由连续网状分布变成不连续分布。此外,合金经超声处理后,力学性能得到明显提高,屈服强度、抗拉强度和伸长率分别由87 MPa,118 MPa和2.1%提高到107 MPa、170 MPa和5.4%。Ultrasonic effects on the microstructure evolution and the mechanical properties of AZ80 alloy were investigated. The results indicate that in the case of the ultrasonic melt treatment, the primary α-Mg phases is transformed from coarse dendrites to nearly fine equiaxed grains, and the β-Mg17Al12 phase at α-Mg boundaries is refined and becomes discontinuous. Besides, the tensile properties of AZ80 alloy are apparently improved after ultrasonic melt treatment, in which 0.2% tensile yield strength, ultimate tensile strength and elongation are improved from 87 MPa, 118 MPa and 2.1% to 107 MPa, 170 MPa and 5.4%, respectively.

关 键 词：AZ80镁合金 超声处理 微观结构 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]