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논문 기본 정보

자료유형
학술저널
저자정보
B. V. Feujofack Kemda (Université du Québec à Rimouski) N. Barka (Université du Québec à Rimouski) M. Jahazi (École de technologie supérieure) D. Osmani (AMH Canada Ltée)
저널정보
대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.27 No.5
발행연도
2021.1
수록면
1,205 - 1,223 (19page)

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초록· 키워드

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In recent years, the usage of dual phase (DP) steels, transformation induced plasticity (TRIP) steels and boron steels in someauto body parts has become a necessity because of their strength and lightweight. Resistance spot welding (RSW) being aprocess were steel is heated and cooled in a very short period of time, the resulting weld nugget is generally fully martensitic,especially in the case of DP, TRIP and boron steels but that also holds for plain carbon steels as AISI 1010 grade whichis extensively used in auto body inner parts. Martensite in is turn must be avoided as much as possible when welding steelbecause it is the principal source of brittleness. Thus, this work aims in finding a mean to reduce martensite fraction andincrease phase diversity in weld nugget. The prediction of phase transformation during RSW has been done. Simulationshave been performed for 2 mm AISI 1010 sheets and results show that the application of post weld heat treatment leads tothe reduction of martensite fraction, and formation of ferrite and bainite in the nugget. Welding experiments have been donein parallel and experimental weld nugget geometry is in good agreement with simulation results.

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