| 7A09铝合金厚板搅拌摩擦焊接头显微组织与性能研究 |
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| 引用本文： | 秦占领,邢丽,柯黎明,邓卫华.7A09铝合金厚板搅拌摩擦焊接头显微组织与性能研究[J].南昌航空工业学院学报,2007,21(2):15-20. |
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| 作者姓名： | 秦占领 邢丽 柯黎明 邓卫华 |
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| 作者单位： | 南昌航空大学材料科学与工程学院 江西南昌330063(秦占领，邢丽，柯黎明)，洪都航空工业集团 江西南昌330024(邓卫华) |
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| 摘 要： | 通过对7A09铝合金的搅拌摩擦焊试验,分析讨论了接头的显微组织和力学性能。试验结果表明:焊核区为细小的等轴晶组织,且焊接速度和搅拌头旋转速度对晶粒的大小有影响;焊接热循环对接头析出相的分布有较大影响;接头显微硬度呈W型分布,热影响区软化趋势最明显;当搅拌头旋转速度和焊接速度匹配适当时,拉伸试样的断裂位置在热影响区,接头的抗拉强度可达到母材的78%。
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| 关 键 词： | 搅拌摩擦焊 7A09铝合金 软化 |
| 文章编号： | 1001-4926（2007）02-0015-06 |
| 收稿时间： | 2007-04-15 |
| 修稿时间： | 2007年4月15日 |
Microstructures and mechanical properties of friction-stir welding joint of 7A09 aluminium alloy thick-sheet |
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| QIN Zhan-ling,XING Li,KE Li-ming,DENG Wei-hua.Microstructures and mechanical properties of friction-stir welding joint of 7A09 aluminium alloy thick-sheet[J].Journal of Nanchang Institute of Aeronautical Technology(Natural Science Edition),2007,21(2):15-20. |
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| Authors: | QIN Zhan-ling XING Li KE Li-ming DENG Wei-hua |
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| Abstract: | Microstructures and mechanical properties of friction-stir welding joint of 7A09 aluminum alloy thick-sheet were investigated.The results show that compared with base metal,the microstructures in the nugget contains fined,equiaxed grains,that transverse speed and rotational speed can affect the size of grains,that the precipitation phenomena in different zone are affected by welding heat.The profile of hardness traverse across the weld exhibits like W and that the heat-affect zone(HAZ) has serious softening.The result of tensile properties shows that the transverse tensile strength of FSW joint can reach about 70% of that of the base metal which fractures at heat-affected zone while transverse speed and rotational speed are optimized. |
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| Keywords: | friction-stir welding 7A09 aluminum alloy softening |
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