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Microstructural characterization of 5083 aluminum alloy thick plates welded with GMAW and twin wire GMAW processes

  • Lijin Huang
  • Xueming Hua
  • Dongsheng Wu
  • Zhao Jiang
  • Fang Li
  • Huan Wang
  • Shaojing Shi
ORIGINAL ARTICLE

Abstract

Thick plates of 5083 aluminum alloy are welded with GMAW and GMAW-TW processes; the influence of weld pool convection on porosity formation, microstructure, and mechanical property of the welding joints is investigated. The results showed that due to the appearance of outward flow and “push-pull” patterns, and intense mixing and stirring effects in GMAW-TW process, a sound weld seam with less porosity can be obtained. The less probability of bubble formation, the shorter escaping distance of the bubble, the easy splitting of bubble, the higher bubble escape velocity, and lower solidification rate are responsible for porosity suppression. Even though the grain size in GMAW-TW process is larger than that in GMAW process, the ultimate tensile strength of the joints is larger, which is caused by less porosity formation, larger number, and uniform distribution of second-phase particles in the welds. Compared with GMAW process, the GMAW-TW process possesses the advantages of higher efficiency, less weld defects, and higher mechanical property in the welding of 5083 aluminum alloy thick plates.

Keywords

5083 aluminum alloy GMAW GMAW-TW Porosity 

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Copyright information

© Springer-Verlag London 2017

Authors and Affiliations

  • Lijin Huang
    • 1
    • 2
  • Xueming Hua
    • 1
    • 2
  • Dongsheng Wu
    • 1
    • 2
  • Zhao Jiang
    • 1
    • 2
  • Fang Li
    • 1
    • 2
  • Huan Wang
    • 3
  • Shaojing Shi
    • 3
  1. 1.Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghaiPeople’s Republic of China
  2. 2.Collaborative Innovation Center for Advanced Ship and Deep-Sea ExplorationShanghaiPeople’s Republic of China
  3. 3.Hudong-Zhonghua Shipbuilding (Group) Co. LtdShanghaiChina

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