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陈超,陈芙蓉,张慧婧.时效及超声冲击复合处理7A52铝合金焊接接头表面纳米化研究[J].稀有金属材料与工程(英文),2018,47(9):2637~2641.[Chao Chen,Furong Chen and Huijing Zhang.Surface nanocrystallization of 7A52 aluminum alloy welded joint by aging and ultrasonic impact compound treatment[J].Rare Metal Materials and Engineering,2018,47(9):2637~2641.]
Surface nanocrystallization of 7A52 aluminum alloy welded joint by aging and ultrasonic impact compound treatment
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Received:December 24, 2016  Revised:February 15, 2017
DOI:
Key words: A-UIT  7A52 aluminum alloy  weld joints  nanocrystallization
Foundation item:NSFC(50765003),内蒙古青年科技英才领军人物项目(103-841025)
Author NameAffiliation
Chao Chen,Furong Chen and Huijing Zhang  
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Abstract:
      A nano-crystal layer of weld joints surface was generated after the UIT (Ultrasonic impact treatment) and A-UIT (Aging and ultrasonic impact compound treatment) treating 7A52 aluminum alloy welded joints. Results indicate that the grain size of weld joints is finer and the surface hardness of the weld joints increases more significantly after A-UIT. Compared with the UIT, which the surface hardening mechanism of 7A52 aluminum alloy welded joints is fine grained strengthening, the surface hardening of 7A52 aluminum alloy welded joints obviously improved with the common effect of fine strengthening and precipitated phase strengthening after the A-UIT.