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ZHENG Sen, CHENG Donghai, CHEN Yiping, HU Dean. Analysis of joint fracture of magnesium alloy and galvanized steel by resistance spot welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(5): 104-107. DOI: 10.12073/j.hjxb.20170523
Citation: ZHENG Sen, CHENG Donghai, CHEN Yiping, HU Dean. Analysis of joint fracture of magnesium alloy and galvanized steel by resistance spot welding[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(5): 104-107. DOI: 10.12073/j.hjxb.20170523
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Analysis of joint fracture of magnesium alloy and galvanized steel by resistance spot welding

  • School of Aeronautical Manufacturing Engineering, Nanchang Hangkong Uiniversity, Nanchang 330063, China

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  • Received Date: May 04, 2015
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  • 2.0 mm thick AZ31B magnesium alloy and 1.0 mm thick SPHC galvanized steel were welded by kDWJ-17 three-phase secondary rectification resistance welding machine. The fracture feature of the joint of magnesium alloy and galvanized steel by resistance spot welding was studied by the optical microscopy observation, scanning electron microscopy (SEM) and atomic binding energy. The results show that: joint fracture presented in the form of junction surface fracture and button fracture. Tensile shear of button fracture was better than junction surface rupture. Button fracture was main of ductile fracture surface, mixed little brittle fracture surface. Button fracture occured when Fe-Al compound is mainly distributed in the nugget. Grain growed coarse near the fusion line and Fe-Al binding energy is strong made the fracture location were in the fusion line. Joint surface fracture occured when Mg-Zn compound was main in the nugget. Binding energy of Mg-Zn compound is weak, which were easily pulled off.
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  • 张高会, 张平则, 潘俊德. 镁及镁合金的研究现状与进展[J]. 世界科技研究与发展, 2003, 25(1): 72-78. Zhang Gaohui, Zhang Pingze, Pan Junde. Research and developments of magnesium and magnesium alloys [J]. Scientific and Technological Research and development In the World, 2003, 25(1): 72-78.
    余 琨, 黎文献, 王日初, 等. 变形镁合金的研究、 开发及应用[J]. 中国有色金属学报, 2003, 13(2): 277-288. Yu kun, Li Wenxian, Wang Richu, et al. Research, development and application of wrought magnesiun alloys[J]. The Chinese Journal of Nonferrous Metals, 2003, 13(2): 277-287.
    王亚荣, 张忠典. 镁合金电阻点焊接头中的缺陷[J]. 焊接学报, 2006, 27(7): 9-12. Wang Yarong, Zhang Zhongdian. Defects in joint for resistance spot welding of magnesium alloy[J]. Transactions of the China Welding Institution, 2006, 27(7): 9-12.
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