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WANG Guoqing, XIONG Linyu, TIAN Zhijie, DONG Kangying, Liu Qi. Microstructure and property of TIG welded 2219 aluminum alloy by different heat treatment[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(1): 121-124.
Citation: WANG Guoqing, XIONG Linyu, TIAN Zhijie, DONG Kangying, Liu Qi. Microstructure and property of TIG welded 2219 aluminum alloy by different heat treatment[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2017, 38(1): 121-124.
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Microstructure and property of TIG welded 2219 aluminum alloy by different heat treatment

  • 1.

    China Academy of Launch Vehicle Technology, Beijing 100076, China

  • 2.

    Capital Aerospace Machinery Company, Beijing 100076, China

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  • Received Date: July 08, 2016
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  • Two heat-treated 2219 aluminum alloys were welded by two-pass TIG welding. DC TIG was used for first pass, AC TIG for cover pass. The micro-structure, phase composition and mechanical properties under room and cryogenictemperaturesof welded joint were tested. The results show that the micro-structures of base metals are α(Al) with Al2Cu strengthening phase, while 2219 C10S has a lath-like micro-structure along the rolling direction, 2219 CYS has a coarse irregular polygon micro-structure. α+θ eutectic phases distribute on grain boundary and matrix in weld and partial meltedzone.Solid solution of Cu in the matrix is in-homogeneous. Coarse grain, grain orientation and grain boundary segregation could be the causes of fracture initiation from partial melted zone of 2219CYS.
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    • References (12)
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