张清,王莹,李萍

• 1:河南科技大学材料科学与工程学院
• 2:洛阳理工学院土木工程学院

摘要(Abstract)：

采用室温拉伸试验,结合显微组织观察、晶粒尺寸测定和晶格常数分析等研究了具有不同稀土元素Y含量的铸态Mg-Y合金的力学性能和强化机制。结果表明,随着Y的质量百分含量从5%增加到12%,铸态Mg-Y合金的抗拉强度先增加后降低且在Y含量为10%时取得最大值,同时合金的伸长率逐渐降低;合金的显微组织由α-Mg基体和Mg_(24)Y_5相组成,随着Y含量的增加,合金的晶粒尺寸减小,高熔点Mg_(24)Y_5相增多;合金的强化机制可主要归结为细晶强化、固溶强化和第二相(Mg_(24)Y_5)强化。

关键词(KeyWords)： 镁合金;显微组织;力学性能;强化机制

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1404501);; 河南省科技发展计划项目(182102210101);; 河南省高等学校重点科研项目(18A430021)

作者(Author): 张清,王莹,李萍

DOI: 10.13289/j.issn.1009-6264.2018-0369

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