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基于涡状搅拌针的2024-T4铝合金搅拌摩擦扩散焊接头成形与断裂载荷

孟立春1,孙晓红1,刘雪松2

孟立春1,孙晓红1,刘雪松2. 基于涡状搅拌针的2024-T4铝合金搅拌摩擦扩散焊接头成形与断裂载荷[J]. 焊接学报, 2018, 39(3): 67-70. DOI: 10.12073/j.hjxb.2018390070
引用本文: 孟立春1,孙晓红1,刘雪松2. 基于涡状搅拌针的2024-T4铝合金搅拌摩擦扩散焊接头成形与断裂载荷[J]. 焊接学报, 2018, 39(3): 67-70. DOI: 10.12073/j.hjxb.2018390070
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MENG Lichun1, SUN Xiaohong1, LIU Xuesong2. Formation and mechanical properties of friction stir diffusion bonding joints with 2024-T4 aluminum alloy by convex-vortex pins[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(3): 67-70. DOI: 10.12073/j.hjxb.2018390070
Citation: MENG Lichun1, SUN Xiaohong1, LIU Xuesong2. Formation and mechanical properties of friction stir diffusion bonding joints with 2024-T4 aluminum alloy by convex-vortex pins[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2018, 39(3): 67-70. DOI: 10.12073/j.hjxb.2018390070
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基于涡状搅拌针的2024-T4铝合金搅拌摩擦扩散焊接头成形与断裂载荷

Formation and mechanical properties of friction stir diffusion bonding joints with 2024-T4 aluminum alloy by convex-vortex pins

摘要

    摘要
  • 摘要: 以2024-T4铝合金为对象进行了搅拌摩擦扩散焊试验，首次提出并使用涡状搅拌针，且对比分析了涡状搅拌针数量对横截面形貌、材料流动行为与力学性能的影响. 结果表明,涡状搅拌针作用下的搭接界面未出现明显的弯曲现象，增加涡状针的数量有利于增加焊核区底部的宽度. 当采用4个涡状结构的搅拌针时，发生拉伸断裂模式的搭接接头有效连接宽度与断裂载荷均大于具有6个涡状结构的搅拌针，其值分别为11.74 mm及17 531.83 N.
    Abstract: Convex-vortex pin was firstly proposed and adopted to join the 2024-T4 aluminum alloy by friction stir diffusion welding. The effect of different stir pins on the cross-section appearance, material flow behavior and mechanical properties was investigated. The results showed that no obvious bending generated in the lap interface under the influence of convex-vortex pins. With the increment of the convex-vortex pins, the width of bottom of nugget zone also increased. The lap joint obtained by four convex-vortex pins presented a higher effective lap width and fracture loads than that of the lap joint obtained by six convex-vortex pins. And the corresponding values were 11.74 mm and 17 531.83 N, respectively.
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  • [1] Salari E, Jahazi M, Khodabandeh A,et al. Influence of tool geometry and rotational speed on mechanical properties and defect formation in friction stir lap welded 5456 aluminum alloy sheets[J]. Materials & Design, 2014, 58(6): 381-389.[2] 柯黎明, 魏 鹏, 邢 丽, 等. 双道焊对搅拌摩擦焊搭接界面及接头性能的影响[J]. 焊接学报, 2011, 32(7): 5-8.Ke Liming, Wei Peng, Xing Li,et al. Influence of double passes weld on interface migration and mechanical property of friction stir lap joint[J]. Transactions of the China Welding Institution, 2011, 32(7): 5-8.[3] Yue Y M, Zhou Z L, Ji S D,et al. Improving joint features and tensile shear properties of friction stir lap welded joint by an optimized bottom-half-threaded pin tool[J]. International Journal of Advanced Manufacturing Technology, 2017, 90(9-12): 2597-2603.[4] Li Z W, Yue Y M, Ji S D,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: 238-247.[5] Liu H J, Zhao Y Q, Hu Y Y,et al. Microstructural characteristics and mechanical properties of friction stir lap welding joint of Al clad 7B04-T74 aluminum alloy[J]. International Journal of Advanced Manufacturing Technology, 2015, 78(9-12): 1415-1425.[6] Shirazi H, Kheirandish S, Safarkhanian M A. Effect of process parameters on the macrostructure and defect formation in friction stir lap welding of AA5456 aluminum alloy[J]. Measurement, 2015, 76: 62-69.[7] Wang M, Zhang H J, Zhang J B,et al. Effect of pin length on hook size and joint properties in friction stir lap welding of 7B04 aluminum alloy[J]. Journal of Materials Engineering and Performance, 2014, 23(5): 1881-1886.[8] 邢 丽, 魏 鹏, 宋 骁, 等. 轴肩下压量对搅拌摩擦焊搭接接头力学性能的影响[J]. 焊接学报, 2013, 34(3): 15-19.Xing Li, Wei Peng, Song Xiao,et al. Influence of plunge depth of shoulder on mechanical properties of friction stir lap joints[J]. Transactions of the China Welding Institution, 2013, 34(3): 15-19.[9] Girard M, Huneau B, Genevois C,et al. Friction stir diffusion bonding of dissimilar metals[J]. Science & Technology of Welding & Joining, 2013, 15(8): 661-665.[10] 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.
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  • 收稿日期:  2017-09-24

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