时效硬化Mg-10Y-1.5Sm合金的强度稳定性（英文）  

Strength Stability of Aging Hardened Mg-10Y-1.5Sm Alloy

作　　者：张清[1] 陈君[1] 李全安[1] Zhang Qing, Chen Jun, Li Quanan(Collaborative Innovation Center of Nonferrous Metals, Henan Province, Henan University of Science and Technology; Luoyang 471023, Chin)

机构地区：[1]河南科技大学有色金属共性技术河南省协同创新中心,河南洛阳471023

出　　处：《稀有金属材料与工程》2018年第3期799-802,共4页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(NSFC-Henan Joint Fund of Personnel Training,U1404501)

摘　　要：采用组织分析和拉伸试验,研究了时效硬化Mg-10Y-1.5Sm (质量分数,%)合金抗拉强度的稳定性。结果表明,Mg-10Y-1.5Sm合金的显微组织由α-Mg基体和Mg_(24)Y_5相组成,没有发现含Sm相的生成。随着温度从20℃升高到300℃,合金的抗拉强度均高于200 MPa,没有明显变化。合金强度对温度不敏感,变化幅度低于10 MPa。其抗拉强度稳定性优于发展最为成功的商用耐热镁合金WE54,原因可主要归结于因Sm固溶而增强的强化相Mg_(24)Y_5硬度的稳定性。The tensile strength stability of aging hardened Mg-10Y-1.5Sm（mass fraction, %） alloy was investigated by microstructure analysis and tensile tests. The results show that the microstructure of Mg-10Y-1.5Sm alloy consists of α-Mg matrix and Mg（24）Y5 phase and the formation of Sm-containing phase is not observed. With the increase of temperature from 20 to 300℃, the tensile strength exceeds 200 MPa and has no obvious change. It is insensitive to temperature and the variation range is less than 10 MPa. The strength stability is superior to that of heat resistant magnesium alloy WE54 developed most successfully. It is mainly attributed to the hardness stability of strengthening phase Mg（24）Y5 enhanced by dissolved Sm.

关 键 词：镁合金 稀土 抗拉强度 强化相 

分 类 号：TG146.22[一般工业技术—材料科学与工程]