任晓霞,王泽辉,房大庆,卫英慧,刘雯,刘宝胜

• 1:太原科技大学材料科学与工程学院
• 2:太原科技大学山西省镁及镁合金工程技术研究中心
• 3:西安交通大学材料科学与工程学院

摘要(Abstract)：

设计制备了4种不同Y和Zn含量的Mg-Y-Zn合金。采用光学显微镜和扫描电镜(SEM)分别观察了铸态和挤压态Mg-Y-Zn合金的组织结构。利用拉伸试验、电化学实验和浸泡实验测试分析了挤压态Mg-Y-Zn合金的力学性能和腐蚀行为。采用SEM观察了合金腐蚀后的表面形貌。结果表明:4种合金的组织都是由基体α-Mg、W相和长周期堆垛有序(Long-period stacking ordered,简称LPSO)结构相构成。LPSO相的含量不仅与Zn和Y含量有关,还与Zn/Y的比值有关。LPSO相体积分数对合金的力学性能和腐蚀行为有重要的影响,LPSO相含量最高的WZ83合金具有良好的综合力学性能,其极限抗拉强度和伸长率分别为325 MPa和19.3%,这主要与LPSO的强化作用有关。合金的腐蚀性能同样是随着LPSO相体积分数的增加而增强,这是由LPSO相对腐蚀的阻碍作用导致的。

关键词(KeyWords)： Mg-Y-Zn;LPSO相;显微组织;力学性能;腐蚀行为

Abstract:

Keywords:

基金项目(Foundation): 山西省科技重大专项项目(20191102004);; 山西省重点研发计划项目(201903D111008);; 山西省高等学校科技成果转化培育项目(TSTAP);; 山西省新兴产业领军人才项目

作者(Author): 任晓霞,王泽辉,房大庆,卫英慧,刘雯,刘宝胜

DOI: 10.13289/j.issn.1009-6264.2020-0040

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