裴梦雨,孙有平,何江美,刘华燊,刘鑫雨

• 1:广西科技大学机械与汽车工程学院
• 2:广西土方机械协同创新中心
• 3:广西汽车零部件与整车技术重点实验室

摘要(Abstract)：

采用光学显微镜(OM)、动态热分析仪、X射线衍射仪(XRD)、拉伸实验机以及扫描电镜(SEM)等研究了退火时间(0～3 h)对大应变、单道次轧制后Mg-1.2Al-0.4Ca-0.3Mn-0.3Zn镁合金板材的显微组织、力学性能以及阻尼性能的影响。结果表明：随着退火时间的延长，合金的晶粒尺寸逐渐增大，抗拉强度逐渐降低，从0 h的247 MPa降低至3 h的227 MPa;退火处理后合金的伸长率较轧制态有所增加，伸长率在退火2 h后最高，为23.4%;在低应变振幅阶段时，退火时间对合金的阻尼性能影响较小；在高应变振幅阶段时，阻尼性能随着退火时间的延长有明显提升。

关键词(KeyWords)： 镁合金;退火时间;显微组织;力学性能;阻尼性能

Abstract:

Keywords:

基金项目(Foundation): 广西重点研发计划(桂科AB23026104)

作者(Author): 裴梦雨,孙有平,何江美,刘华燊,刘鑫雨

DOI: 10.13289/j.issn.1009-6264.2023-0277

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