1(Al2CuLi) in grain boundry of weldment increased after solution and aging treatment, and the obvious precipitate free zone(PFZ) generated to grain boundry. The IGC does not occur to joint in as-welded(AW) condition, while the pitting corrosion occurs to both heat-affected zone(HAZ) and base metal of welded joint. The susceptibility to IGC of joint increased after aging treatment, both the pitting corrosion and IGC occurred to HAZ, and the severe IGC produced to base metal. It has excellent EXCO resistance for both weld metal and HAZ in AW condition, while the susceptibility to EXCO is higher for base metal. The EXCO resistance can be improved to base metal after aging treatment, however the susceptibility to EXCO will increase to HAZ. Results of electrochemical corrosion measurement show that, compared to the weldment after aging treatment, the self-corrosion potential of weldment is a little higher in AW condition, and its density of self-corrosion current is lower, consequently, it has the relatively better corrosion resistance."/>
College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics,College of Material Science and Technology,Nanjing University of Aeronautics and Astronautics
TG456.3
Aeronautical Science Foundation of China(No. 2015ZE52048);A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions
[Wang Shaogang, Huang Yan, Zhao Li. Effect of Aging Treatment on Corrosion Resistance of Al-Li Alloy Joint Welded by Electron Beam Welding[J]. Rare Metal Materials and Engineering,2018,47(7):1973~1979.]
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