7050-T7451铝合金静轴肩搅拌摩擦焊接头组织与性能研究

张华; 赵常宇; 林三宝; 石功奇

7050-T7451铝合金静轴肩搅拌摩擦焊接头组织与性能研究

1. 北京石油化工学院机械工程学院, 北京 102617;
2. 哈尔滨工业大学先进焊接与连接技术国家重点实验室, 哈尔滨 150001;
3. 英国焊接研究所, 坎布里奇, 英国

基金项目:

先进焊接与连接国家重点实验室开放课题基金资助项目(AWJ-16-Z01)

详细信息

作者简介:
张华,1976年出生,博士,教授。主要研究领域为搅拌摩擦焊、腐蚀与防护等,已发表相关文章40余篇。

中图分类号: TG453⁺.9
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- 收稿日期: 2018-05-13

Microstructures and mechanical properties of 7050-T7451 aluminum alloy joint welded by stationary shoulder friction stir welding

1. School of Mechanical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China;
2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China;
3. The Welding Institute, Cambridge, UK

摘要

摘要: 采用SSFSW技术成功实现了7050-T7451高强铝合金的焊接。对该接头的外观形貌、显微组织、硬度分布及力学性能分别进行了试验研究。结果表明，与常规FSW相比，SSFSW的接头成形美观，表面光滑，焊缝无减薄现象；焊缝组织结构也有明显的不同，热影响区范围明显窄小，前进侧TMAZ只有60 μm；接头硬度呈典型的“W”形分布，最低硬度出现在靠近焊核的热影响区附近，显微硬度为128 HV；接头的抗拉强度为487 MPa，达到了母材的91%，力学性能良好。断裂发生在热影响区，为微孔聚集型断裂。
- 静轴肩搅拌摩擦焊 /
- 7050铝合金 /
- 显微组织 /
- 力学性能
Abstract: 7050-T7451 aluminum alloy joint was successfully obtained by stationary shoulder friction stir welding（ SSFSW）. Weld appearance,microstructures,hardness profiles and tensile properties of the joint were measured and studied. The results show that the joint by SSFSW process has good and smooth appearance,and there is little reduction in the weld thickness. Compared with the conventional FSW,the microstructures of SSFSW joint was also significantly different. The thermomechanically affected zone is quite narrow,whose width on the advancing side is only 60 μm. The hardness profiles of joint presents"W"shape,the lowest hardness occurs in the heat affected zone near the weld nugget,the microhardness is 128 HV. The tensile strength of the joint is 486.8 MPa,which reaches up to 92% of the base metal. The fracture occurs in the heat affected zone,which is a typical ductile fracture.
- stationary shoulder friction stir welding /
- 7050 aluminum alloy /
- microstructure /
- tensile property

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参考文献(22)

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施引文献(10)

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2.	孙焕焕，王崭，任益博，巴豪强，王珂，郭禹含. 搅拌摩擦加工对TiB_2/7050复合材料微观组织及腐蚀行为的影响. 沈阳理工大学学报. 2022(01): 62-67 . 百度学术
3.	付宁宁，朱志民，金文涛，戴忠晨. 6061-T6铝合金T形接头静止轴肩搅拌摩擦焊工艺及接头断裂行为研究. 金属加工(热加工). 2021(10): 12-17 . 百度学术
4.	张华，郭启龙，赵常宇，林三宝，石功奇. 双级时效对7050-T7451铝合金搅拌摩擦焊组织及应力腐蚀敏感性的影响. 焊接学报. 2020(06): 1-5+97 . 百度学术
5.	张贵锋，朱大恒，程若亮，刘旭. 搅拌摩擦对接焊根部弱连接特征、成因及液相溶解消除方法. 焊管. 2020(11): 26-35 . 百度学术
6.	张华，郭启龙，赵常宇，林三宝，石功奇. Influence of two-step aging on structure and stress corrosion sensitivity of friction stir welded 7050-T7451 aluminum alloys. China Welding. 2020(04): 1-6 . 百度学术
7.	孙舒蕾，张会杰，赵晟伟，谢胜楠，吕洋. 搅拌摩擦焊焊缝表面凹陷现象控制方法研究现状. 精密成形工程. 2019(03): 138-143 . 百度学术

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7050-T7451铝合金静轴肩搅拌摩擦焊接头组织与性能研究

作者简介: 张华,1976年出生,博士,教授。主要研究领域为搅拌摩擦焊、腐蚀与防护等,已发表相关文章40余篇。

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Microstructures and mechanical properties of 7050-T7451 aluminum alloy joint welded by stationary shoulder friction stir welding

期刊类型引用(7)

其他类型引用(3)

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出版历程

目录

作者简介:
张华,1976年出生,博士,教授。主要研究领域为搅拌摩擦焊、腐蚀与防护等,已发表相关文章40余篇。