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

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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.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Materials Laser Processing and Modification, School of Materials Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People’s Republic of China

    Lijin Huang, Xueming Hua, Dongsheng Wu, Zhao Jiang & Fang Li

  2. Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, 800 Dongchuan Road, Shanghai, 200240, People’s Republic of China

    Lijin Huang, Xueming Hua, Dongsheng Wu, Zhao Jiang & Fang Li

  3. Hudong-Zhonghua Shipbuilding (Group) Co. Ltd, Pudong Street 2851, Shanghai, 200240, China

    Huan Wang & Shaojing Shi

Authors
  1. Lijin Huang
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  2. Xueming Hua
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  3. Dongsheng Wu
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  4. Zhao Jiang
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  5. Fang Li
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  6. Huan Wang
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  7. Shaojing Shi
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Correspondence to Xueming Hua.

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Huang, L., Hua, X., Wu, D. et al. Microstructural characterization of 5083 aluminum alloy thick plates welded with GMAW and twin wire GMAW processes. Int J Adv Manuf Technol 93, 1809–1817 (2017). https://doi.org/10.1007/s00170-017-0480-1

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  • DOI: https://doi.org/10.1007/s00170-017-0480-1

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