Abstract
Weld zones in tailor welded blanks have different mechanical properties than the base metals and thus have significant effects on formability. In this work, flow stresses of weld zones in laser-welded dissimilar dual-phase steels were measured. Strains at the weld zones of notched specimens were measured using the digital image correlation method and the flow stress data were corrected considering the anisotropy. For validation, finite element simulations were performed for the cup drawing process by considering the measured weld zone properties, and the weld line movements were compared with the measurements.
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Abbreviations
- ε ij :
-
true strain (i, j = 1, 2, 3)
- σ ij :
-
true stress (i, j = 1, 2, 3)
- e ij :
-
engineering strain (i, j = 1, 2, 3)
- S ij :
-
engineering stress (i, j = 1, 2, 3)
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Acknowledgement
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT) (No. 2019R1A5A6099595), the Fundamental Research Program of Korea Institute of Materials Science, and the Ministry of Trade, Industry & Energy (MOTIE, Korea) under Industrial Technology Innovation Program (No. 10077492, ‘Development of mass production total engineering technologies for metal-composites hybrid process (joining & forming) & over 25% lightweight side crash carbody structure components’).
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Hur, Y.C., Kim, D., Kim, B.M. et al. Measurement of Weld Zone Properties of Laser-Welded Tailor-Welded Blanks and Its Application to Deep Drawing. Int.J Automot. Technol. 21, 615–622 (2020). https://doi.org/10.1007/s12239-020-0058-z
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DOI: https://doi.org/10.1007/s12239-020-0058-z