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Effect of repair welding on the corrosion behavior of 7N01 aluminum alloy welded joint
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1.School of Mechanical Engineering,North China University of Water Resources and Electric Power;2.National Joint Engineering Research Center for Abrasion Control and Molding of

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Research Foundation for High-level talent Scholars in North China University of Water Resources and Electric Power (No. 201811034), Open Fund of National Joint Engineering Research Center for abrasion control and molding of metal materials (No.HKDNM2019020), the National Natural Science Foundation of China (51705151), the China Postdoctoral Science Foundation (2019M662011), Open Fund of State Key Laboratory of Advanced Brazing Filler Metals and Technology (SKLABFMT201901) and Key Technology Needs of Henan Province Unveiled and Solved Project (191110111000).

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    Abstract:

    Mandatory repair welding for production of structural parts easily causes problems to the reliability of welded joints due to the resultant extra thermal cycle. The evolution of corrosion resistance of repair welded joint between 7N01 aluminum alloy in T5 and T4 state by metal inert gas welding process was investigated. The results reveal that repair welding deteriorated the corrosion resistance of weldment, especially of the heat-affected zone. The main reason for the change in corrosion resistance of repair weldment could be related to the transformation of precipitates and diffusion of Zn from the matrix to grain boundaries caused by the extra thermal cycles.

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[Shuai Li, Zhongying Liu, Xingxing Wang, Feng Mao, Yueqing Xia, Yongtao Jiu, Linjian Shangguan, Weimin Long. Effect of repair welding on the corrosion behavior of 7N01 aluminum alloy welded joint[J]. Rare Metal Materials and Engineering,2021,50(3):762~768.]
DOI:10.12442/j. issn.1002-185X. E20200033

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History
  • Received:July 24,2020
  • Revised:August 26,2020
  • Adopted:August 28,2020
  • Online: April 02,2021
  • Published: