Mg-12Gd-2Y-1.5Sm-0.5Zr合金显微组织和力学性能  

Microstructure and Mechanical Properties of Mg-12Gd-2Y-1.5Sm-0.5Zr Alloy

作　　者：亢海娟[1] 李全安[1] 周伟[1] 

机构地区：[1]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《热加工工艺》2012年第20期23-25,共3页Hot Working Technology

基　　金：国家自然基金项目(51171059);河南省基础与前沿技术研究计划项目(102300410018);河南省高校科技创新团队支持计划资助项目(2012IRTSTHN008)

摘　　要：研究了合金元素对Mg-12Gd-2Y-1.5Sm-0.5Zr合金显微组织和力学性能的影响。结果表明,该合金晶粒组织细小,少量Y、Sm和大量Gd固溶在镁基体里,同时有少量MgGd3、Mg24Y5和Mg41Sm5相析出;合金在室温、200、250℃下的抗拉强度分别为258、304、330 MPa;断裂为脆性断裂,与合金的低伸长率相对应。The effects of alloying elements on the microstructure and mechanical properties of Mg-1 2Gd-2Y-1.5Sm-0.5Zr alloy were studied. The results show that the alloy has fine microstructure and a small quantity of Y, Sm and a mass of Gd solutioning in the Mg matrix. There are a little of MgGd3, Mg24Y5 and Mg41Sm5 precipitating in the alloy. The tensile strength of the alloy at room temperature, 200 ℃ and 250 ℃ arc 285 MPa, 304 MPa and 330 MPa, respectively. The fracture mode is brittle fracture, which can explain the low elongation of the alloy.

关 键 词：Mg-12Gd-2Y-1.5Sm-0.5Zr合金 显微组织 力学性能 

分 类 号：TG113.1[金属学及工艺—物理冶金]