薛寒松,邓功凯,李鹤,白任杰

• 1:重庆大学材料科学与工程学院
• 2:重庆大学国家镁合金材料工程技术研究中心

摘要(Abstract)：

利用光学显微镜(OM)、扫描电镜(SEM)、能谱分析仪(EDS)、X射线衍射分析(XRD)和电子拉伸试验机等研究了不同热处理工艺对挤压态ZMT613-0.5Sm镁合金组织及性能影响。结果表明:合金主要由α-Mg、Mg_(41)Sm_5、Mg_2Sn、MgZn_2相组成。经热处理后,合金晶粒尺寸较均匀、未出现明显长大及第二相聚集现象。双级时效处理后,有大量Mg-Zn相在晶内及晶界附近析出,合金组织中第二相数量较单级时效有较大增加,弥散程度较高。时效态合金的抗拉强度和屈服强度远高于挤压态。双级时效处理后,合金综合力学性能最好,其抗拉强度、屈服强度和伸长率分别为396 MPa、340 MPa和5.8%,抗拉强度和屈服强度较挤压态合金分别提高19.6%和55.3%。

关键词(KeyWords)： 镁合金;固溶处理;双级时效;显微组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划项目(2016YFB0301101);; 国家自然科学基金重点项目(U1764253;51531002);; 重庆市重大装备用系列高性能合金材料共性技术开发及应用(cstc2015zdcy-ztzx50002)

作者(Author): 薛寒松,邓功凯,李鹤,白任杰

DOI: 10.13289/j.issn.1009-6264.2020-0627

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