Guan Liqun, Yuan Manfa, Zhang Jin, Deng Yunlai, Xu Xuehong, Wan Li
Institute of Intelligent Manufacturing, Suzhou Jianxiong Vocational and Technical College, Suzhou 215400, China.
Guangdong Fenglu Aluminium Co., Ltd., Foshan 528133, China.
Materials (Basel). 2023 Sep 14;16(18):6183. doi: 10.3390/ma16186183.
The quasi in situ EBSD test was applied to study the effect of grain orientation on corrosion behaviors of the thermomechanically affected zone I (TMAZ I) of dissimilar AA6082/AA7204 friction stir welding (FSW) joints in this work. The results show that the structure with grain orientation close to the brass texture ({110}<112>) has excellent corrosion resistance, which contributes to the better corrosion performance of the TMAZ I of the 7204-AS joint than the 7204-RS joint. Furthermore, the brass texture around by S texture ({213}<364>) in the TMAZ I of the 7204-AS joint is slightly corroded, and the orientation of the remaining structure is closer to the ({110}<112>) than before, which indicates that the corrosion, like deformation, is carried out alongside the {110} plane for the structure with grain orientation near {110}<112>. Those findings could provide new insight into the designed FSW joints and improve the corrosion resistance of the wrought aluminum alloy.
在这项工作中，采用准原位电子背散射衍射（EBSD）测试研究了晶粒取向对不同铝合金AA6082/AA7204搅拌摩擦焊接（FSW）接头热机械影响区I（TMAZ I）腐蚀行为的影响。结果表明，具有接近黄铜织构（{110}<112>）的晶粒取向的组织具有优异的耐腐蚀性，这使得7204-AS接头的TMAZ I比7204-RS接头具有更好的腐蚀性能。此外，7204-AS接头的TMAZ I中由S织构（{213}<364>）包围的黄铜织构略有腐蚀，其余组织的取向比之前更接近（{110}<112>），这表明对于晶粒取向接近{110}<112>的组织，腐蚀与变形一样，沿着{110}面进行。这些发现可为搅拌摩擦焊接接头的设计提供新的见解，并提高变形铝合金的耐腐蚀性。
