Li Defu, Wang Xijing
State Key Laboratory of Advanced Processing and Recycling of Non-Ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China.
Faculty of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China.
Materials (Basel). 2021 Sep 14;14(18):5287. doi: 10.3390/ma14185287.
This paper carried out the friction plug repair welding of 6082 aluminum alloy keyhole defects by using the method of friction heating between shaft shoulder and base material. In addition, a well-formed friction plug welding joint was obtained at different plug rotation speeds. In order to study the influence mechanism of plug rotation speeds on the microstructure of the weld nugget zone, EBSD technology was used to analyze the grain morphology, grain size and grain boundary characteristics of the weld nugget zone under different rotation speeds of the plug rod. The results show that in the nugget zone, the grain was fine and equated crystals refinement, and there was a preferred orientation. The deformation texture components in the welded nugget zone increased with the plug rotation speed from 1600 to 2000 rpm. However, the grain size first decreased and then increased, while the components in the High-Angle Boundary first increased and then decreased.
本文采用轴肩与母材之间的摩擦热方法对6082铝合金锁孔缺陷进行了摩擦塞补焊。此外，在不同的塞棒转速下获得了成形良好的摩擦塞焊接接头。为了研究塞棒转速对焊接熔核区微观组织的影响机制，采用电子背散射衍射（EBSD）技术分析了在不同塞棒转速下焊接熔核区的晶粒形态、晶粒尺寸和晶界特征。结果表明，在熔核区，晶粒细小且等轴晶细化，存在择优取向。焊接熔核区的变形织构组分随塞棒转速从1600转/分钟增加到2000转/分钟而增加。然而，晶粒尺寸先减小后增大，而高角度晶界中的组分先增加后减小。
