异种铝合金回填式搅拌摩擦点焊的组织与性能
Microstructure and mechanical properties of refill friction stir spot welded dissimilar 7075/6061 aluminum alloys
-
摘要: 选用6061-T6与7075-T6铝合金为研究对象，研究异种合金回填式搅拌摩擦点焊接头的组织和拉剪性能. 将7075铝合金作为上板，主要讨论套筒下扎深度对接头成形和性能的影响. 结果表明，当套筒刚扎透上板时，接头内部无缺陷产生. 随着套筒下扎深度的增大，接头内部会出现孔洞、撕裂和未充分回填等缺陷. 当使用较小的套筒扎入量时，决定接头性能的关键位置，即钩状缺陷处和焊点中心搭接面处的结合情况良好. 接头的断裂载荷随着套筒下扎深度的增大先增大后减小，最大载荷在深度为3.4 mm时达到7 236 N.Abstract: The microstructure and lap shear properties of refill friction stir spot welded dissimilar 7075/6061 aluminum alloys joints were studied. 7075 aluminum alloy was used as the upper sheet. The effect of sleeve plunge depth on joint formation and mechanical properties were discussed. The results showed that defect-free joints were obtained when plunge depth was small that the upper sheet was just penetrated. Defects such as void, tear and incomplete refilling appeared in the weld as the sleeve plunge depth increased. Hook and lap interface at joint center, which is critical to the mechanical properties of the joint, was well jointed when shoulder plunge depth was small. The fracturing load was firstly increased and then decreased with the increase of sleeve plunge depth. The maximum fracturing load was 7 236 N when using 3.4 mm.
-
-
[1] 申志康, 杨新岐, 张照华, 等. 铝合金回填式搅拌摩擦点焊组织及力学性能分析[J]. 焊接学报， 2013, 34(6): 73-76.Shen Zhikang, Yang Xinqi, Zhang Zhaohua,et al. Analysis of microstructure and mechanical properties of refill friction stir spot welded aluminum alloy[J]. Transactions of the China Welding Institution， 2013, 34(6): 73-76.[2] Li Z, Ji S, Ma Y,et al. Fracture mechanism of refill friction stir spot welded 2024-T4 aluminum alloy[J]. International Journal of Advanced Manufacturing Technology， 2016, 86(5): 1925-1932.[3] 李政玮. 铝合金RFSSW的材料流动规律及力学性能研究[D]. 沈阳： 沈阳航空航天大学， 2014.[4] Suhuddin U F H, Fischer V, Dos Santos J F. The thermal cycle during the dissimilar friction spot welding of aluminum and magnesium alloy[J]. Scripta Materialia, 2013, 68: 87-90.[5] 朱小刚, 王联凤, 乔凤斌, 等. 6061-T6铝合金回填式搅拌摩擦点焊疲劳性能分析[J]. 焊接学报， 2014, 35(4): 91-94.Zhu Xiaogang， Wang Lianfeng， Qiao Fengbin,et al. Fatigue failure analysis of 6061-T6 aluminum alloy refilled friction stir spot welding[J]. Transactions of the China Welding Institution， 2014, 35(4): 91-94.[6] Li Z, Gao S, Ji S,et al. Effect of rotational speed on microstructure and mechanical properties of refill friction stir spot welded 2024 Al alloy[J]. Journal of Materials Engineering and Performance， 2016, 25(4): 1673-1682.[7] 岳玉梅, 李政玮, 马轶男, 等. 下扎深度对回填式搅拌摩擦点焊接头断裂行为的影响[J]. 西安交通大学学报， 2015, 49(8): 122-127.Yue Yumei, Li Zhengwei, Ma Yinan,et al. Effect of plunge depth on fracture behavior of refill friction stir spot welding[J]. Journal of Xi’an Jiaotong University, 2015, 49(8): 122-127.[8] Zhao Y Q, Liu H J, Chen S X,et al. Effects of sleeve plunge depth on microstructures and mechanical properties of friction spot welded alclad 7B04-T74 aluminum alloy[J]. Materials & Design, 2014, 62: 40-46.[9] Yin Y H, Sun N, North T H,et al. Hook formation and mechanical properties in AZ31 friction stir spot welds[J]. Journal of Materials Processing Technology， 2010, 210: 2062-2070. -
期刊类型引用(6)
1. 徐东辉，孟范鹏，孙鹏，郑旭宸，程永超，马志，陈树君. 基于深度学习的GMAW焊接缺陷在线监测. 焊接学报. 2024(03): 114-119+135-136 . 
本站查看
2. 李春凯，王嘉昕，石玗，代悦. GTAW熔池激光条纹动态行为与熔透预测方法研究. 机械工程学报. 2024(06): 236-244 . 百度学术
3. 朱珍文，张刚，朱明，李春凯，石玗. LNG储罐内罐立缝智能化焊接技术研究思路. 电焊机. 2023(09): 22-28+36 . 百度学术
4. 任乐，张爱华，常东东，何倩玉，马晶. 基于电弧声的超窄间隙焊接熔合状态识别. 电焊机. 2021(07): 11-16+23+113-114 . 百度学术
5. 王佳杰，王伟，杜星炜，杨武丙，许建平. 具有自动送丝功能的高效焊接电烙铁设计. 机械制造文摘(焊接分册). 2020(02): 17-21 . 百度学术
6. 顾玉芬，席保龙，李春凯，石玗，代悦，丁彬. 基于熔池振荡的GTAW熔透实时传感与控制. 电焊机. 2020(12): 5-8+108 . 百度学术
其他类型引用(11)
计量
- 文章访问数: 815
- HTML全文浏览量: 4
- PDF下载量: 3
- 被引次数: 17
下载:
