张美丽,罗姝淑,韩茜,代卫丽,李春,刘彦峰

• 1:商洛学院陕西省尾矿资源综合利用重点实验室
• 2:商洛学院陕西省矿产资源清洁高效转化与新材料工程研究中心

摘要(Abstract)：

研究了不同含量的稀土(La,Ce)元素对AZ31D镁合金显微组织与力学性能的影响。结果表明:添加一定量的稀土元素后,AZ31D镁合金的组织主要由α-Mg基体、β-Mg_(17)Al_(12)相和Al_(11)(La,Ce)_3相所组成,β-Mg_(17)Al_(12)相沿晶界呈连续和半连续网状分布。稀土(La,Ce)可有效抑制晶粒的生长,使镁合金晶粒得到明显细化,在稀土含量为1.25%时,镁合金的晶粒最为细小。随着稀土(La,Ce)含量的增加,AZ31D镁合金的硬度、抗拉强度、断面收缩率及耐腐蚀性均先增大后减小,在稀土含量为1.25%的综合性能最好。添加稀土元素后,镁合金断口上有明显的撕裂棱和韧窝,断裂以韧窝和解理断裂的混合形式为主。

关键词(KeyWords)： 镁合金;稀土;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 陕西省教育厅专项科研计划资助项目(20JK0618);; 陕西省大学生创新创业训练计划项目(S201911396038);; 商洛学院科研项目(18SKY010)

作者(Author): 张美丽,罗姝淑,韩茜,代卫丽,李春,刘彦峰

DOI: 10.13289/j.issn.1009-6264.2020-0194

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