Effect of Sleeve Plunge Depth on Interface/Mechanical Characteristics in Refill Friction Stir Spot Welded Joint
来源期刊：Acta Metallurgica Sinica2020年第4期
论文作者：Guang-Da Sun Li Zhou Ren-Xiao Zhang Ling-Yun Luo Hao Xu Hong-Yun Zhao Ning Guo Di Zhang
文章页码：551 - 560
摘 要：Refill friction stir spot welding was employed to produce 6061-T6 aluminum alloy joints with different sleeve plunge depths.The interface characteristics of joint-line remnant and hook are investigated by optical and scanning electron microscopy.The joint-line remnant consists of primary bonding region and secondary bonding region,and two types of hook can be identified as downward hook and upward hook.Tensile shear results demonstrate that joint-line remnant and hook make interaction effects on tensile shear properties.The optimal joint is achieved when sleeve plunge depth was 2.0 mm with the corresponding failure load of 8673.4 N.Three different types of fracture mode are exhibited in joints produced at different sleeve plunge depths,which are closely related with the morphology of interface characteristics.
Guang-Da Sun1,2，Li Zhou1,2，Ren-Xiao Zhang2，Ling-Yun Luo2，Hao Xu2，Hong-Yun Zhao2，Ning Guo1,2，Di Zhang3
1. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology2. Shandong Provincial Key Laboratory of Special Welding Technology,Harbin Institute of Technology at Weihai3. State Key Laboratory of Advanced Metals and Materials,University of Science and Technology Beijing
摘 要：Refill friction stir spot welding was employed to produce 6061-T6 aluminum alloy joints with different sleeve plunge depths.The interface characteristics of joint-line remnant and hook are investigated by optical and scanning electron microscopy.The joint-line remnant consists of primary bonding region and secondary bonding region,and two types of hook can be identified as downward hook and upward hook.Tensile shear results demonstrate that joint-line remnant and hook make interaction effects on tensile shear properties.The optimal joint is achieved when sleeve plunge depth was 2.0 mm with the corresponding failure load of 8673.4 N.Three different types of fracture mode are exhibited in joints produced at different sleeve plunge depths,which are closely related with the morphology of interface characteristics.
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