张震,陈君,陈晓亚,李全安,郭希宽,王春阳

• 1:河南科技大学材料科学与工程学院
• 2:有色金属新材料与先进加工技术省部共建协同创新中心

摘要(Abstract)：

采用铸造法制备了Mg-9Gd-1.5Zn-xAl(x=0、0.3、0.8和1.3 mass%)合金，通过X射线衍射仪、光学显微镜、扫描电镜等研究了不同Al含量对Mg-9Gd-1.5Zn合金物相和显微组织的影响，并采用电子拉伸试验机测试了室温下4种合金的力学性能。结果表明：铸态Mg-9Gd-1.5Zn合金的组织由α-Mg基体和沿晶界分布的Mg_5Gd和(Mg, Zn)_3Gd相组成，加入Al元素后，合金组织中Mg_5Gd相逐渐减少，并产生了新相Al_2Gd、Al_(11)Gd_3和LPSO(Mg_(12)Gd(Al, Zn))。Al元素促进了有效异质形颗粒(Al_2Gd)的产生，抑制了晶粒长大，合金的组织明显细化，起到了细晶强化的效果。当Al添加量为0.8%时，合金的抗拉强度、屈服强度和伸长率分别为192.2 MPa、154.8 MPa和16.6%,与不含Al的Mg-9Gd-1.5Zn合金相比，分别提升了47.1%、64.8%和121.3%。

关键词(KeyWords)： Mg-Gd-Zn合金;LPSO相;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51571084)

作者(Author): 张震,陈君,陈晓亚,李全安,郭希宽,王春阳

DOI: 10.13289/j.issn.1009-6264.2023-0313

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