6061铝合金FSW接头组织与耐蚀性能的研究
Study on Microstructure and Corrosion Resistance of 6061 Aluminium Alloy Friction Stir Welded Joint
王淼 1李天景 1黄婷婷 1曾一达2
作者信息
- 1. 盐城工业职业技术学院 汽车与交通学院,江苏 盐城 224002
- 2. 南昌航空大学 航空制造工程学院,江西 南昌 330063
- 折叠
摘要
对 4 mm厚的 6061-T6 铝合金板进行了搅拌摩擦焊接,通过浸泡腐蚀试验和电化学腐蚀试验研究焊缝腐蚀性能,采用金相显微镜、透射电镜等观察接头的微观组织.结果表明:6061 铝合金FSW焊核区晶粒显著细化,晶界第二相较少;焊核区的耐剥落腐蚀和晶间腐蚀性能优于热影响区的;焊核区比热影响区的腐蚀电位较高,腐蚀电流密度较小,焊核区表现出更好的耐腐蚀性能.
Abstract
The friction stir welding of 4 mm thick 6061-T6 aluminum alloy plate was carried out.The corrosion behavior of the weld area was studied by immersion corrosion test and electrochemical corrosion test,and the microstructure of the joint was investigated by using optical microscopy and TEM.The results show that the grain in FSW nugget area of 6061 aluminum alloy is significantly refined,and the content of the second phase at grain boundary is small;the resistance to exfoliation corrosion and intergranular corrosion of the nugget area is better than that of heat affected zone.Compared with the heat affected zone,the nugget zone has higher corrosion potential and lower corrosion current density,which shows better corrosion resistance.
关键词
6061铝合金/搅拌摩擦焊/焊核区/耐蚀性能Key words
6061 aluminum alloy/friction stir welding/weld nugget area/corrsion resistance引用本文复制引用
基金项目
江苏省高等学校自然科学研究面上项目(21KJD430003)
江苏省大学生创新创业训练计划立项项目(202113752010Y)
江苏省现代教育技术研究课题(2021-R-92586)
出版年
2024
NETL
NSTL
万方数据