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异种铝合金回填式搅拌摩擦点焊缺陷及力学性能

郑敏, 申志康, 杨新岐, 尹玉环

郑敏, 申志康, 杨新岐, 尹玉环. 异种铝合金回填式搅拌摩擦点焊缺陷及力学性能[J]. 焊接学报, 2016, 37(8): 87-90.
引用本文: 郑敏, 申志康, 杨新岐, 尹玉环. 异种铝合金回填式搅拌摩擦点焊缺陷及力学性能[J]. 焊接学报, 2016, 37(8): 87-90.
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ZHENG Min, SHEN Zhikang, YANG Xinqi, YIN Yuhuan. Defects and mechanical properties of refill friction stir spot welded joint of dissimilar aluminum alloys[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(8): 87-90.
Citation: ZHENG Min, SHEN Zhikang, YANG Xinqi, YIN Yuhuan. Defects and mechanical properties of refill friction stir spot welded joint of dissimilar aluminum alloys[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2016, 37(8): 87-90.
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异种铝合金回填式搅拌摩擦点焊缺陷及力学性能

  • 1.

    天津大学 天津市现代连接技术重点实验室, 天津 300072

  • 2.

    上海航天设备制造总厂, 上海 200245

基金项目: 高等学校博士学科点专项科研基金资助项目

Defects and mechanical properties of refill friction stir spot welded joint of dissimilar aluminum alloys

  • 1.

    Tianjin Key Laboratory of Advanced Joining Technology, Tianjin University, Tianjin 300072, China

  • 2.

    Shanghai Spaceflight Manufacture(Group) Co., Ltd, Shanghai 200245, China

摘要

    摘要
  • 摘要: 采用回填式搅拌摩擦点焊技术对2 mm厚5052-H112与2024-T4铝合金进行了成功的连接.试验结果表明，当焊接工艺参数选择恰当时，可得到无缺陷接头；然而，焊接工艺窗口较窄，在高热输入条件下易产生多种缺陷，如粘连韧带、孔洞、裂纹、弱连接等，且这些缺陷主要分布在两板的结合面及焊具退出工件的退出线上；力学性能测试结果表明在低热输入条件下，接头的力学性能（一字拉伸与十字拉伸）最高，这与焊点在低热输入情况下组织缺陷较少有关；在一字和十字拉伸载荷作用下，接头的失效位置位于两板结合面及退出线上，在结合面处形成了有效的冶金连接.
    Abstract: Dissimilar aluminum alloys of 5052-H112 and 2024-T4 (2 mm) were successfully joined by refill friction stir spot welding. Defects-free joint was obtained under optimum welding conditions. However, the welding parameters window was rather narrow. At the high heat input, lots of defects such as ligament bonding, voids, cracks and kissing bonding appear, which accumulated at the interface and the path in which the sleeve plunges into the workpiece. The mechanical properties tests show that the preferable strength is obtained under lower heat input welding conditions, which is consistent with that the defects-free joint tends to form under lower heat input welding conditions. The failure of the joint occurred at the interface and the path where the sleeve plunges into the workpiece both under tensile and cross-tension loadings. The effective metallurgical bonding formed at the interface.
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    • 参考文献(10)
  • [1] 刘会杰, 李金全, 段卫军. 静止轴肩搅拌摩擦焊的研究进展[J]. 焊接学报, 2012, 33(5):108-112. Liu Huijie, Li Jinquan, Duan Weijun. Progress in the stationary shoulder friction stir welding[J]. Transactions of the China Welding Institution, 2012, 33(5):108-112.
    [2] 王希靖, 申志康, 张忠科. 铝和镀锌钢板的搅拌摩擦焊搭接分析[J]. 焊接学报, 2011, 32(12):97-100. Wang Xijing, Shen Zhikang, Zhang Zhongke. Study of friction-stir-welded lap joint of aluminum and zinc-coated steel[J]. Transactions of the China Welding Institution, 2011, 32(12):97-100.
    [3] 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, 32(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, 32(6):73-76.
    [4] Shen Z, Chen Y, Hou J S C, et al. Influence of processing parameters on microstructure and mechanical performance of refill friction stir spot welded 7075-T6 aluminium alloy[J]. Science and Technology of Welding and Joining, 2015, 20(1):48-57.
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    [7] Rosendo T, Parra B, Tier M, et al. Mechanical and microstructural investigation of friction spot welded AA6181-T4 aluminium alloy[J]. Materials and Design, 2011, 32(3):1094-1100.
    [8] Oosterkamp A, Oosterkamp L, Nordeide A. Kissing bond'phenomena in solid-state welds of aluminum alloys[J]. Welding Journal, 2004, 83(8):225-S.
    [9] Gerlich, A, Avramovic-Cingara, G, North, T. Stir zone microstructure and strain rate during Al 7075-T6 friction stir spot welding[J]. Metalurgical and Materials Transaction A, 2006, 37(9):2273-2886.
    [10] Tylecote R F. The solid phase welding of metals. New York:St. Martin's Press. 1968.
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  • 收稿日期:  2014-09-27

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