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논문 기본 정보

자료유형
학술저널
저자정보
Nazmul Huda (University of Waterloo) Dae-Geun Nam (Korea Institute of Industrial Technology) Yeong-Do Park (Dong-Eui University)
저널정보
대한용접·접합학회 대한용접·접합학회지 大韓熔接·接合學會誌 第37卷 第6號
발행연도
2019.12
수록면
564 - 571 (8page)

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초록· 키워드

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The present study focused on finding a mechanism to achieve good weldability in three sheets spot welding. Two combinations of three sheets (Al-HPF combinations with mild steel / HPF steel / DP steel stacking) and (TRIP combination with mild steel / TRIP780 steel / DP590 steel stacking) were used. Weld quality was evaluated by measuring the button diameter after peel test, and peak load measurement using a tensile shear test. A high speed camera and simulation (SORPAS) were used to investigate the nugget growth mechanism. The Al-HPF combinations showed higher nugget growth rate in the sheet thickness direction, however the TRIP combination showed higher nugget growth rate in the sheet rolling direction. Also, the TRIP combination produced a larger nugget diameter (or higher penetration) in the thin sheet of interface "A" than the Al-HPF combination. The main reason for the larger nugget diameter in the TRIP combination was the higher current density and wider current path resulting from the high indentation on interface "A". The selection of a middle sheet with optimum electro-mechanical properties for the three sheet stack can improve the weldability of three sheets spot welding for car body construction.

목차

Abstract
1. Introduction
2. Materials
3. Welding Equipment and Procedure
4. Results and Discussion
5. Conclusions
References

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