时海芳,张正强,姜永恒,孟超

• 1:辽宁工程技术大学材料科学与工程学院

摘要(Abstract)：

镁合金焊接接头的微观组织对其力学性能有显著影响，限制其更广泛应用。受大自然生物结构所表现的优异力学性能的启发，利用激光重熔技术在镁合金钨极惰性气体保护焊(TIG焊)焊接接头表面制备了与生物体表类似的“软硬”交替结构来改善其力学性能。采用激光共聚焦显微镜、扫描电镜、能谱仪、硬度计、万能拉伸试验机、有限元分析等研究了不同试样的微观组织和力学性能。结果表明：激光仿生处理后，处理区形成了细小的等轴晶粒并且显微硬度明显增加，仿生试样的强度和延展性同时提高。结合有限元分析结果可知，仿生结构对力学性能的有益影响可归因于微观组织的变化和“软硬”交替结构带来的应力传递和重分布。

关键词(KeyWords)： AZ31B镁合金;TIG焊接;激光仿生;微观组织;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51805235)

作者(Author): 时海芳,张正强,姜永恒,孟超

DOI: 10.13289/j.issn.1009-6264.2022-0358

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• 引用格式:时海芳，张正强，姜永恒，等．AZ31B镁合金仿生TIG焊接接头的组织和性能[J]．材料热处理学报，2023,44(2):179-188.SHI Hai-fang,ZHANG Zheng-qiang,JIANG Yong-heng,et al.Microstructure and properties of bionic TIG welded joint of AZ31B magnesium alloy[J].Transactions of Materials and Heat Treatment,2023,44(2):179-188.

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