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High Efficiency and Quality of Multi-Pass Tandem Gas Metal Arc Welding for Thick Al 5083 Alloy Plates

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Abstract

Multi-pass tandem gas metal arc welding (TGMAW) for Al 5083 alloy plates with 30mm thickness is carried out to study its high efficiency and high quality. The welding process is evaluated by high-speed photographs and electrical signals. The deposition rate and welding time are calculated to characterize the welding efficiency. The bead formation, porosity, microstructure and mechanical properties are tested and analyzed. The results indicate that though arc deflection occurs due to the electromagnetic interference between two arcs during TGMAWprocess, it does not affect the welding process stability significantly. The deposition rate and welding time of TGMAW process are about 15 g/min larger and about 16.7% less than those of gas metal arc welding (GMAW) process respectively, accompanied by the reduction of heat input. The TGMAW welded joint has less porosity and more refined microstructure to contribute to the improvement of mechanical properties (micro-hardness, tensile strength and ductility). It can be concluded that TGMAW process yields excellent performance of welded joint with improved welding efficiency, which makes it extremely practical during welding of thick plates.

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Authors and Affiliations

  1. Shanghai Key Laboratory of Materials Laser Processing and Modification; Collaborative Innovation Center for Advanced Ship and Deep-Sea Exploration, Shanghai Jiao Tong University, Shanghai, 200240, China

    Zhao Jiang  (姜朝), Xueming Hua  (华学明), Lijin Huang  (黄立进), Dongsheng Wu  (吴东升), Fang Li  (李芳) & Yan Cai  (蔡艳)

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  1. Zhao Jiang  (姜朝)
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  2. Xueming Hua  (华学明)
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  3. Lijin Huang  (黄立进)
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  4. Dongsheng Wu  (吴东升)
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  5. Fang Li  (李芳)
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  6. Yan Cai  (蔡艳)
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Corresponding author

Correspondence to Xueming Hua  (华学明).

Additional information

Foundation item: the National Natural Science Foundation of China (No. 51475297), and the Fund of the Ministry of Industry and Information Technology of China Under the Project of LNG Shipbuilding

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Jiang, Z., Hua, X., Huang, L. et al. High Efficiency and Quality of Multi-Pass Tandem Gas Metal Arc Welding for Thick Al 5083 Alloy Plates. J. Shanghai Jiaotong Univ. (Sci.) 24, 148–157 (2019). https://doi.org/10.1007/s12204-018-1977-y

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  • DOI: https://doi.org/10.1007/s12204-018-1977-y

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