| Comparative study on fatigue properties of friction stir and MIG-pulse welded joints in 5083 Al-Mg alloy |
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| 作者姓名： | 周才智 杨新岐 栾国红 |
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| 作者单位： | [1]School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China [2]China Friction Stir Welding Center Beijing Friction Stir Welding Technology Limited Company, Beijing 100024, China |
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| 基金项目： | Project supported by China FSW Center Beijing FSW Technology Limited Company, China |
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| 摘 要： | The objective of this investigation was to compare the fatigue properties of friction stir welds with those of MIG-pulse welds. The 5083 Al-Mg alloy was welded by single pass friction stir welding（FSW） and double-sided MIG-pulse welding. The results show that friction stir（FS） welds have a better appearance than MIG-pulse welds for the lack of voids, cracks and distortions. Compared with the parent plate, FSW welds exhibit similar fine grains, while MIG-pulse welds display a different cast microstructure due to the high heat input and the addition of welding wire. The S-N curves of FSW and MIG-pulse joints show that the fatigue life of FS welds is 18 - 26 times longer than that of MIG-pulse welds under the stress ratio of 0.1 and the calculated fatigue characteristic values of each weld increase from 38.67 MPa for MIG-pulse welds to 53.59 MPa for FSW welds.
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| 关 键 词： | 金属加工 焊接工艺 摩擦力 疲劳强度问题 MIG脉冲 |
| 文章编号： | 1003-6326（2005）04-0789-06 |
| 收稿时间： | 2005-03-14 |
| 修稿时间： | 2005-05-24 |
Comparative study on fatigue properties of friction stir and MIG-pulse welded joints in 5083 Al-Mg alloy |
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| ZHOU Cai-zhi,YANG Xin-qi,LUAN Guo-hong.Comparative study on fatigue properties of friction stir and MIG-pulse welded joints in 5083 Al-Mg alloy[J].Transactions of Nonferrous Metals Society of China,2005,15(4):789-794. |
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| Authors: | ZHOU Cai-zhi YANG Xin-qi LUAN Guo-hong |
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| Abstract: | The objective of this investigation was to compare the fatigue properties of friction stir welds with those of MIG-pulse welds. The 5083 Al-Mg alloy was welded by single pass friction stir welding(FSW) and double-sided MIG-pulse welding. The results show that friction stir(FS) welds have a better appearance than MIG-pulse welds for the lack of voids, cracks and distortions. Compared with the parent plate, FSW welds exhibit similar fine grains, while MIG-pulse welds display a different cast microstructure due to the high heat input and the addition of welding wire. The S-N curves of FSW and MIG-pulse joints show that the fatigue life of FS welds is 18 - 26 times longer than that of MIG-pulse welds under the stress ratio of 0.1 and the calculated fatigue characteristic values of each weld increase from 38.67 MPa for MIG-pulse welds to 53.59 MPa for FSW welds. |
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| Keywords: | friction stir welding MIG-pulse welds fatigue properties microstructures |
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