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静轴肩辅助铝镁搅拌摩擦搭接接头的组织与性能

许志武, 李政玮, 冯艳, 闫久春

许志武, 李政玮, 冯艳, 闫久春. 静轴肩辅助铝镁搅拌摩擦搭接接头的组织与性能[J]. 焊接学报, 2017, 38(4): 1-6. DOI: 10.12073/j.hjxb.20170401
引用本文: 许志武, 李政玮, 冯艳, 闫久春. 静轴肩辅助铝镁搅拌摩擦搭接接头的组织与性能[J]. 焊接学报, 2017, 38(4): 1-6. DOI: 10.12073/j.hjxb.20170401
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XU Zhiwu, LI Zhengwei, FENG Yan, YAN Jiuchun. Microstructure and mechanical properties of Mg/Al friction stir lap welding joint assisted by stationary shoulder[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(4): 1-6. DOI: 10.12073/j.hjxb.20170401
Citation: XU Zhiwu, LI Zhengwei, FENG Yan, YAN Jiuchun. Microstructure and mechanical properties of Mg/Al friction stir lap welding joint assisted by stationary shoulder[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(4): 1-6. DOI: 10.12073/j.hjxb.20170401
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静轴肩辅助铝镁搅拌摩擦搭接接头的组织与性能

  • 1.

    哈尔滨工业大学 先进焊接与连接国家重点实验室, 哈尔滨 150001

  • 2.

    哈尔滨工业大学 先进焊接与连接国家重点实验室, 哈尔滨 150001;哈尔滨工程大学 材料科学与化学工程学院, 哈尔滨 150001

基金项目: 国家自然科学基金资助项目（51204111）

Microstructure and mechanical properties of Mg/Al friction stir lap welding joint assisted by stationary shoulder

  • 1.

    Harbin Institute of Technology, State Key Laboratory of Advanced Welding and Joining, Harbin 150001, China

  • 2.

    Harbin Institute of Technology, State Key Laboratory of Advanced Welding and Joining, Harbin 150001, China;College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China

摘要

    摘要
  • 摘要: 文中将静止轴肩技术应用到铝镁异种合金的搅拌摩擦搭接过程中，并分析了焊接速度对接头成形和力学性能的影响.结果表明，静止轴肩能够增强上下板之间的材料交换，焊后搅拌区呈较大的洋葱环形貌，其内部分布大量的金属间化合物；搭接面处发生良好的冶金结合.由于生成金属间化合物，洋葱环区域的显微硬度值明显高于接头其它区域.X射线衍射结果表明，金属间化合物的主要成分是Al3Mg2和Al12Mg17.接头的抗拉强度随着焊接速度的增加呈先上升后下降的趋势，最大值在焊接速度为40 mm/min时取得.
    Abstract: In this work, stationary shoulder was used in friction stir lap welding (FSLW) of dissimilar magnesium alloy to aluminum alloy. Effect of the welding speed on microstructure and mechanical properties of the lap joint were mainly studied. Results show that the stationary shoulder can enhance the material mixing between the two alloys. The stir zone (SZ) is characterized by a big onion ring after welding, in which plenty of intermetallic compounds (IMC) can be obtained. Excellent metallurgical bonding can be observed at the lap interface. Microhardness of the onion ring is higher than other regions of the joint due to the IMC. X-ray diffraction (XRD) pattern analysis shows that the main IMCs formed in the SZ are Al3Mg2 and Al12Mg17. Lap shear failure load of the joint firstly increases and then decreases with increasing the welding speed. The maximum load is obtained when using 40 mm/min.
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    • 参考文献(14)
  • [1] 张 昭, 刘会杰. 搅拌头形状对搅拌摩擦焊材料变形和温度场的影响[J]. 焊接学报, 2011, 32(3): 5-8. Zhang Zhao, Liu Huijie. Effect of pin shapes on material deformation and temperature field in friction stir welding[J]. Transactions of the China Welding Institution, 2011, 32(3): 5-8.
    [2] 李 达, 孙明辉, 崔占全. 工艺参数对铝镁搅拌摩擦焊焊缝成形质量的影响[J]. 焊接学报, 2011, 32(8): 97-100. Li Da, Sun Minghui, Cui Zhanquan. Effect of parameters on friction stir welding joint of 7075 Al and AZ31B Mg[J]. Transactions of the China Welding Institution. 2011, 32(8): 97-100.
    [3] Sato Y, Park S, Michiuchi M, et al. Constitutional liquation during dissimilar friction stir welding of Al and Mg alloys[J]. Scripta Materialia, 2004, 50(9): 1233-1236.
    [4] Li J, Liu H. Effects of the reversely rotating assisted shoulder on microstructures during the reverse dual-rotation friction stir welding[J]. Journal of Materials Science & Technology, 2015, 31(4): 375-383.
    [5] Mohammadi J, Behnamian Y, Mostafaei A, et al. Friction stir welding joint of dissimilar materials between AZ31B magnesium and 6061 aluminum alloys: microstructure studies and mechanical characterizations[J]. Materials Characterization, 2015, 101: 189-207.
    [6] Davies P, Wynne B, Rainforth W, et al. Development of microstructure and crystallographic texture during stationary shoulder friction stir welding of Ti-6Al-4V[J]. Metallurgical and Materials Transactions A, 2011, 42(8): 2278-2289.
    [7] Jiang X, Wynne B. Microstructure and texture evolution of stationary shoulder friction stir welded Ti6Al4V alloy[J]. Science and Technology of Welding and Joining, 2015, 20(7): 594-600.
    [8] Li J, Liu H. Effects of tool rotation speed on microstructures and mechanical properties of AA2219-T6 welded by the external non-rotational shoulder assisted friction stir welding[J]. Materials & Design, 2013, 43: 299-306.
    [9] Ji S, Meng X, Liu J, et al. Formation and mechanical properties of stationary shoulder friction stir welded 6005A-T6 aluminum alloy[J]. Materials & Design, 2014(62): 113-117.
    [10] Wu H, Chen Y, Strong D, et al. Stationary shoulder FSW for joining high strength aluminum alloys[J]. Journal of Materials Processing Technology, 2015, 221: 187-196.
    [11] Li Z, Yue Y, Ji S, et al. Joint features and mechanical properties of friction stir lap welded alclad 2024 aluminum alloy assisted by external stationary shoulder[J]. Materials & Design, 2016, 90(15): 238-247.
    [12] Ji S, Li Z, Zhang L, et al. Effect of lap configuration on magnesium to aluminum friction stir lap welding assisted by external stationary shoulder[J]. Materials & Design, 2016, 103(5): 160-170.
    [13] Kostka A, Coelho R S, dos Santos J, et al. Microstructure of friction stir welding of aluminium alloy to magnesium alloy[J]. Scripta Materialia, 2009, 60(11): 953-956.
    [14] Firouzdor V, Kou S. Formation of liquid and intermetallics in Al-to-Mg friction stir welding[J]. Metallurgical and Materials Transactions A, 2010, 41(12): 3238-3251.
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  • 收稿日期:  2016-10-28

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