| Friction stir welding of AZ31 magnesium alloy |
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| 作者姓名： | 林三宝 张华 吴林 冯吉才 戴鸿滨 |
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| 作者单位： | [1]StateKeyLaboratoryofAdvancedWeldingProductionTechnology,HarbinInstituteofTechnology,Harbin,150001 [2]HarbinUniversityofScienceandTechnology,Harbin,150080 |
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| 基金项目： | NationalHighTechniqueDevelopmentFoundationofChina ( 2 0 0 2AA3 3 1160 ) |
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| 摘 要： | Friction stir welding (FSW) is an new solid-phase joining technology which has more advantages over fusion welding methods in welding of aluminum and other non-ferrous metals. The effects of welding parameters on mechanical properties and microstructure during friction stir welding of AZ31 magnesium alloy were studied in this paper. Microstructures and mechanical properties of the joints were investigated by means of optical microscopy, scanning electric microscopy ( SEM ) , micro-hardness analysis, and tensile test. Experimental results show that the magnesium alloy can be successfully welded by FSW method, and the ultimate tensile strength (UTS) of FSW joint reaches up to 90 percent of base metal. The microstructures of welded joints exhibit the variation from dynamically recrystallized fine grains to greatly deformed grains. Hardness in nugget zone was found lower than the base metal but not too obvious.
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| 关 键 词： | 搅拌摸察焊 镁合金 焊接接头 微观结构 机械性能 |
Friction stir welding of AZ31 magnesium alloy |
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| Lin Sanbao,Zhang Hua,Wu Lin,Feng Jicai,Dai Hongbin.Friction stir welding of AZ31 magnesium alloy[J].China Welding,2003,12(2):137-141. |
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| Authors: | Lin Sanbao Zhang Hua Wu Lin Feng Jicai Dai Hongbin |
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| Abstract: | Friction stir welding (FSW) is an new solid-phase joining technology which has more advantages over fusion welding methods in welding of aluminum and other non-ferrous metals. The effects of welding parameters on mechanical properties and microstructure during friction stir welding of AZ31 magnesium alloy were studied in this paper. Microstructures and mechanical properties of the joints were investigated by means of optical microscopy, scanning electric microscopy (SEM), micro-hardness analysis, and tensile test. Experimental results show that the magnesium alloy can be successfully welded by FSW method, and the ultimate tensile strength (UTS) of FSW joint reaches up to 90 percent of base metal. The microstructures of welded joints exhibit the variation from dynamically recrystallized fine grains to greatly deformed grains. Hardness in nugget zone was found lower than the base metal but not too obvious. |
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| Keywords: | friction stir welding magnesium alloy microstructure micro-hardness |
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