Sm对AZ61合金力学性能的影响  

Effects of Samarium on Mechanical Properties of AZ61 Alloy

作　　者：李克杰[1,2] 李全安[2] 

机构地区：[1]台州职业技术学院机电工程学院,浙江台州318000 [2]河南科技大学材料科学与工程学院,河南洛阳471003

出　　处：《稀土》2012年第1期28-32,共5页Chinese Rare Earths

基　　金：河南省基础与前沿技术研究计划(102300410018);浙江省公益技术研究工区精项目(2011C31030);浙江省高等学校优秀青年教师资助计划;台州职业技术学院重要研究项目(2011ZD07)

摘　　要：采用XRD、OM和SEM手段研究了Sm(0～2.0%,质量分数,下同)对AZ61合金显微组织和力学性能的影响。结果表明,Sm优先与A1形成高熔点Al2Sm弥散相,细化合金显微组织,提高时效态合金室温抗拉强度和屈服强度。在研究范围内,加入1.5%Sm的合金力学性能最优。Sm可以通过细晶强化、Ramakrishnan强化和Gypen固溶强化机制对AZ61合金强度产生影响。Microstructure and mechanical properties of AZ61 magnesium alloy with Sm（0-2.0 wt.%） addition were investigated through XRD,OM and SEM.The results show that the addition of Sm can dramatically enhance the yield strength and tensile strength of the aged alloy at ambient temperature.Added 0.5wt%~2.0wt% Sm,the microstructure of the AZ61 alloy is remarkably refined,and the spotted,high-melting point phase Al2Sm is found in the alloy.The mechanical properties of the AZ61 alloy with 1.5wt% Sm are optimal in this study.Sm can improve the mechanical properties of AZ61 alloy by grain-refinement strengthening,Ramakrishnan strengthening and Gypen strengthening mechanism.

关 键 词：钐 镁合金 显微组织 力学性能 

分 类 号：TG146.22[一般工业技术—材料科学与工程]