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J Weld Join > Volume 31(1); 2013 > Article
Journal of KWJS 2013;31(1):21-25.
DOI: https://doi.org/10.5781/KWJS.2013.31.1.21    Published online June 4, 2013.
High Current Arc Welding Technology of Aluminum Alloy
Young-Bae Choi, Mun-Jin Kang, Dong-Cheol Kim, In-Sung Hwang
Correspondence:  In-Sung Hwang,
Email: hisman@kitech.re.kr
Aluminum alloy, Al5083-O, is one of candidate materials for the LNG storage tank, because of its excellent weldability, cryogenic characteristics, and corrosion resistance. The good weldability of Al5083-O is very important in LNG storage tank manufacturing. In this study, high current metal inert gas(MIG) welding process was used to get one pass welding of thick plate aluminum alloy. Bead on plate(BOP) welding was performed to evaluate the effect of welding conditions on the height of bead and depth of penetration. The optimum welding conditions were derived to get one pass welding of the thickness of 14.5mm. The mechanical properties of the welded joint were evaluated. The cross-sectional macro test, tensile test, and bending test satisfied the class rule.
Key Words: Aluminum alloys, Metal inert gas welding, Full penetration weld

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