Ca对Mg-10Gd-0.5Zr合金力学性能的影响  

Effects of Ca on Mechanical Properties of Mg-10Gd-0.5Zr Alloy

作　　者：马旭[1,2] 李全安[1,2,3] 井晓天[1] 

机构地区：[1]西安理工大学,陕西西安710048 [2]河南科技大学,河南洛阳471023 [3]有色金属共性技术河南省协同创新中心,河南洛阳471023

出　　处：《铸造》2016年第1期66-70,共5页Foundry

基　　金：国家自然科学基金(51171059);河南省基础与前沿技术研究计划(102300410018);河南省高校科技创新团队支持计划(2012IRTSTHN008)

摘　　要：采用XRD、OM、SEM和电子拉力试验机,研究了Ca（0～2.0%）对Mg-10Gd-0.5Zr合金显微组织和力学性能的影响。结果表明,Ca优先与Mg形成高熔点Mg_2Ca弥散相,可以细化合金的显微组织,提高时效合金的力学性能。在研究范围内,加入1.5%Ca的合金力学性能最优。Ca可以通过弥散强化和细晶强化机制对Mg-10Gd-0.5Zr合金力学性能产生影响。Microstructure and mechanical properties of Mg- 10Gd-0.5Zr magnesium alloy with Ca（0-2.0wt.%） addition were investigated through XRD, OM, SEM and electronic tensile testing machine. The results show that the addition of Ca can dramatically enhance the mechanical properties of the aged alloy at ambient temperature. Within the scope of the study, the microstructure of the Mg-10Gd-0.5Zr alloy is remarkably refined, and the spotted, high-melting point phase Mg2Ca is found in the alloy. The mechanical properties of the Mg- 10Gd-0.5Zr alloy with 1.5wt% Ca are the best. Ca can improve the mechanical properties of Mg-10Gd-0.5Zr alloy by dispersion strengthening and fine grain strengthening.

关 键 词：镁合金 CA 抗拉强度 伸长率 显微组织 

分 类 号：TG146.22[一般工业技术—材料科学与工程]