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镁/铝合金回填式搅拌摩擦点焊的组织与性能

徐波, 但楚臣, 何兆坤, 姬书得, 吕赞

徐波, 但楚臣, 何兆坤, 姬书得, 吕赞. 镁/铝合金回填式搅拌摩擦点焊的组织与性能[J]. 焊接学报, 2019, 40(11): 106-110. DOI: 10.12073/j.hjxb.2019400296
引用本文: 徐波, 但楚臣, 何兆坤, 姬书得, 吕赞. 镁/铝合金回填式搅拌摩擦点焊的组织与性能[J]. 焊接学报, 2019, 40(11): 106-110. DOI: 10.12073/j.hjxb.2019400296
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XU Bo, DAN Chuchen, HE Zhaokun, JI Shude, LV Zan. Microstructure and mechanical properties of refill friction stir spot welded dissimilar Mg/Al alloys[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(11): 106-110. DOI: 10.12073/j.hjxb.2019400296
Citation: XU Bo, DAN Chuchen, HE Zhaokun, JI Shude, LV Zan. Microstructure and mechanical properties of refill friction stir spot welded dissimilar Mg/Al alloys[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2019, 40(11): 106-110. DOI: 10.12073/j.hjxb.2019400296
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镁/铝合金回填式搅拌摩擦点焊的组织与性能

  • 1.

    中车四方车辆有限公司, 青岛 266111

  • 2.

    沈阳航空航天大学, 沈阳 110136

基金项目: 国家自然科学基金资助项目（51705339）

Microstructure and mechanical properties of refill friction stir spot welded dissimilar Mg/Al alloys

  • 1.

    CRRC SIFANG Co.,Ltd., Qingdao 266111, China

  • 2.

    Shenyang Aerospace University, Shenyang 110136, China

摘要

    摘要
  • 摘要: 选用5083铝合金和AZ31B镁合金为研究对象，研究焊接时间对异种合金回填式搅拌摩擦点焊接头的金属间化合物层和拉剪性能的影响.结果表明，当焊接时间为1 s时，Mg合金的流动性较差，接头中出现明显的孔洞缺陷；随着焊接时间的变长，孔洞缺陷消失.由于铝镁表面的氧化膜在焊接过程中被打碎且焊接温度高于铝镁的共晶温度，接头中心会形成一层液相层，焊后液相层凝固形成金属间化合物.接头的抗拉载荷随着焊接时间的延长先升高后降低，最优载荷在焊接时间为2 s时取得，为3.1 kN.
    Abstract: Using 5083 Al alloy and AZ31B Mg alloy as the research objects, the effect of welding time on the intermetallic compounds and lap shear properties of refill friction stir spot welded joints were mainly studied. Results showed that the Mg alloy had insufficient material flow behavior when the welding time was 1 s, thus void appeared after welding. Void disappeared with increasing the welding time. Liquid eutectic phase formed inside the joint because the oxide layers on the Al and Mg substrate surfaces were broken by the stirring of the pin and the welding temperature was higher than the eutectic temperature. Intermetallic compounds formed after the solidification of the liquid eutectic phase. The lap shear failure load firstly increased and then decreased with increasing the welding time. The maximum failure load of 3.1 kN was obtained when the welding time of 2 s was used.
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    • 参考文献(10)
  • [1] Xu Z, Li Z, Peng B, et al. Application of a new ultrasonic-assisted semi-solid brazing on dissimilar Al/Mg alloys[J]. Materials Letters, 2018, 228:72-76.
    [2] 蒋若蓉, 李文亚, 杨夏炜, 等. 薄板AA2024铝合金无针搅拌摩擦焊搭接工艺与接头性能[J]. 焊接学报, 2016, 37(4):98-102 Jiang Ruorong, Li Wenya, Yang Xiawei, et al. Pinless friction stir lap welding of AA2024 alloy sheet:joint formability and property[J]. Transactions of the China Welding Institution, 2016, 37(4):98-102
    [3] Uematsu Y, Tokaji K, Tozaki Y, et al. Effect of re-filling probe hole on tensile failure and fatigue behavior of friction stir spot welded joints in Al-Mg-Si alloy[J]. International Journal of Fatigue, 2008, 30:1956-1966.
    [4] 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 Xian Jiaotong University, 2015, 49(8):122-127
    [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] 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.
    [8] Shen Z, Yang X, Zhang Z, et al. Microstructure and failure mechanisms of refill friction stir spot welded 7075-T6 aluminum alloy joints[J]. Materials & Design, 2014, 44:476-486.
    [9] 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.
    [10] Cao J Y, Wang M, Kong L, et al. Microstructure, texture and mechanical properties during refill friction stir spot welding of 6061-T6 alloy[J]. Materials Characterization, 2017, 128:54-62.
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  • 收稿日期:  2019-03-05

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