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논문 기본 정보

자료유형
학술저널
저자정보
Minjung Kang (Korea Institute of Industrial Technology) Jason Cheon (Korea Institute of Industrial Technology) Tae Hyun Lee (Korea Institute of Industrial Technology)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第39卷 第2號
발행연도
2021.4
수록면
174 - 181 (8page)

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초록· 키워드

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This study addressed the gas metal arc welding (GMAW) of Al 5183 aluminum alloy using variable polarity (VP). The effects of the electrode negative (EN) pulsing ratio and repetition frequency on the geometrical features and microstructural evolution of the deposited materials were investigated and discussed. The current and voltage were manually controlled independently for each phase to evaluate the effect of the polarity change. The influence of phase and its changing frequency on the geometrical features and microstructure evolution were observed. The phase of the electrode affected the arc concentration and changed the amount of the deposited material and the dilution between the substrate. The EN phase is beneficial for making a finer structure than the electrode positive (EP) phase because of the lower heat input per unit mass. In addition, the size of the grains decreased as the phase change frequency increased. When the number of repetitions frequency increased within a cycle, the size of the microstructure was reduced. Consequently, strategies can be established to minimize the microstructure with VP-GMAW welding using a high EN pulsing ratio and low repetition conditions.

목차

Abstract
1. Introduction
2. Experimental procedure
3. Results and Discussion
4. Conclusion
References

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