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《Electric Welding Machine》 2019-08
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Research on microstructure and properties of friction stir welding welded joint for 7085-T7452 aluminum alloy

MENG Yao;XIA Peiyun;YIN Yuhuan;XU Kui;HUANG Zheng;GUO Bing;Shanghai Aerospace Equipments Manufacturer Co.,Ltd.;  
The experiments of friction stir welding with different parameters are implemented on 7085-T7452 aluminum alloy. The microstructure of weld and the mechanical properties of welded joint are analyzed. The sizes of grains in nuclear zone(NZ) are compared quantitatively. The distribution characteristics of strengthening phase are emphatically studied. The results show that the NZ is composed of equiaxial recrystallized grains and the size range of these grains is 3.6~7.5 μm. The tensile strength of welded joint is over 70% of the base metal. There is rich Cu in the strengthened phase in the NZ. It can be seen that the strengthening phase at the top of NZ is more than that at the bottom of NZ.
【Fund】: 装备预先研究项目(41423050116)
【CateGory Index】: TG407
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