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JWJ > Volume 39(2); 2021 > Article
Journal of Welding and Joining 2021 April;39(2) :206-211.
Published online April 2, 2021.
doi:https://doi.org/10.5781/JWJ.2021.39.2.10
Weldability of Aluminum Alloy and Hot Dip Galvanized Steel by AC Pulse MIG Brazing
Yong-Hyuk Kwon*, Sol Choi**, Hye-Seul Yoon***, Hee-Seon Bang****
*Dept. of Mechanical Engineering, Chosun College of Science & Technology, Gwangju, 61453, Korea
**Korea Automotive Technology Institute, Gwangju, 62465, Korea
***Graduate School, Dept. of Welding and Joining Science Engineering, Chosun Univ., Gwangju, 61452, Korea
****Dept. of Welding and Joining Science Engineering, Chosun Univ., Gwangju, 61452, Korea
Correspondence: Sol Choi  Email: schoi@katech.re.kr
Received October 15, 2020  Revised November 30, 2020  Accepted March 12, 2021  Published online April 2, 2021
ABSTRACT
This study investigates the weldability of dissimilar materials, such as Al6061-T6 aluminum alloy and hot dip galvanized (GI) steel, via AC pulse metal inert gas (MIG) brazing. Notably, the brazing mechanism was investigated for different electrode negative (EN) ratios. The results showed that as the amount of deposition increased with the EN ratio, throat thickness, wetting length, and leg length also tended to increase. Furthermore, it was confirmed that as the EN ratio increased, a thin intermetallic compound (IMC) layer was deposited due to the suppression of IMC growth caused by the low heat input at the joint interface.
Keywords: AC pulse MIG brazing | Dissimilar materials | EN ratio | Intermetallic compound layer
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