赵亚忠,彭建,刘蒙恩,王正军,程仁菊

• 1:南阳理工学院机械与汽车工程学院
• 2:重庆大学材料科学与工程学院

摘要(Abstract)：

利用光学显微镜、扫描电镜、X射线衍射分析仪、热/力模拟试验机、拉伸试验机等研究了Mg-1.9Zn-0.9Mn-xNd合金铸态组织与性能。结果表明:Mg-1.9Zn-0.9Mn合金组织为α-Mg+α-Mn+MgZn,当含钕量大于0.22 mass%时合金中出现了Mg-ZnNd三元合金相T_1(六方晶格)和T_2(斜方晶格);随含钕量增加,三元合金相数量增大,屈服强度及显微硬度随之增加,但当三元合金相形态由不连续的块状向断网状和网状转变后,受力时晶间产生裂纹,使抗拉强度及断后伸长率降低;在热压缩试验中合金发生了不完全再结晶,钕使峰值应力从50.8 MPa提高到92.4 MPa,并且使动态再结晶晶粒细化。

关键词(KeyWords)： 镁合金;钕;铸态;合金相;热压缩

Abstract:

Keywords:

基金项目(Foundation): 国家自科面上资助项目(51374132);; 河南省科技厅基础与前沿资助项目(122300410008)

作者(Author): 赵亚忠,彭建,刘蒙恩,王正军,程仁菊

DOI: 10.13289/j.issn.1009-6264.2018-0050

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