张 清,陈 君,李全安.时效硬化Mg-10Y-1.5Sm合金的强度稳定性[J].稀有金属材料与工程,2018,47(3):799~802.[Zhang Qing,Chen Jun,Li Quan-an.Strength stability of aging hardened Mg-10Y-1.5Sm alloy[J].Rare Metal Materials and Engineering,2018,47(3):799~802.]
时效硬化Mg-10Y-1.5Sm合金的强度稳定性
投稿时间:2016-03-24  修订日期:2016-08-24
中文关键词:  镁合金  稀土  抗拉强度  强化相
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
中文摘要:
      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Mg24Y5相组成,没有发现含Sm相的生成。随着温度从20 oC升高到300 oC,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Mg24Y5硬度的稳定性。
Strength stability of aging hardened Mg-10Y-1.5Sm alloy
英文关键词:magnesium alloy  rare earth  tensile strength  strengthening phase
英文摘要:
      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 Mg24Y5 phase and the formation of Sm-containing phase is not observed. With the increase of temperature from 20 oC to 300 oC, 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. The reason is mainly attributed to the hardness stability of strengthening phase Mg24Y5 enhanced by dissolved Sm.
作者单位E-mail
张 清 河南科技大学 材料科学与工程学院 foxzq@126.com 
陈 君 河南科技大学 材料科学与工程学院  
李全安 河南科技大学 材料科学与工程学院  
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