Correlation between sheet formability and joint strength of A1050-O/SPCC butt laser welded tailored blanks

Correlation between sheet formability and joint strength of A1050-O/SPCC butt laser welded tailored blanks

JIN Jianchen, SAKAMOTO Hiromu, IIZUKA Takashi

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Abstract. Laser-welded tailored blanks are useful for lightweight automobiles. However, three major problems remain unresolved: low joint strength, low formability, and galvanic corrosion. Although considerable research has been conducted on the lap form, the studies on the use of lasers to weld dissimilar metals in the butt form are scarce. For practical applications of dissimilar metal tailored blanks, formability must also be investigated. In this study, Japan Industrial Standard A1050-O aluminum and SPCC steel were welded as dissimilar metal tailored blanks and used for Erichsen, flat punch stretch, and hole expansion tests. Welded materials with different joint strengths were produced to investigate the correlation between joint strength and formability. Two patterns of fracture owing to differences in joint strength were observed during the flat punch stretch test. The results of the formability test confirmed that the formability improved with an increase in the joint strength.

Tailor Welded Blanks, Sheet Formability, Aluminum, Dissimilar Metals, Laser Welding

Published online 4/24/2024, 10 pages
Copyright © 2024 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: JIN Jianchen, SAKAMOTO Hiromu, IIZUKA Takashi, Correlation between sheet formability and joint strength of A1050-O/SPCC butt laser welded tailored blanks, Materials Research Proceedings, Vol. 41, pp 1343-1352, 2024


The article was published as article 149 of the book Material Forming

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[1] M. Kleiner, M. Geiger, A. Klaus, Manufacturing of Lightweight Components by Metal Forming, CIRP Ann. 52-2 (2003) 521-542.
[2] J. Hirsch, Aluminium in Innovative Light-Weight Car Design, Mater. Trans. 55-5 (2011) 818-824.
[3] T. Tanaka, T. Morishige, T. Hirata, Comprehensive analysis of joint strength for dissimilar friction stir welds of mild steel to aluminum alloys, Scr. Mater. 61-7 (2009) 756-759.
[4] T. Tanaka, T. Hirata, N. Shinomiya, N. Shirakawa, Analysis of material flow in the sheet forming of friction-stir welds on alloys of mild steel and aluminum, J. Mater. Process. Technol. 226 (2015) 115-124.
[5] X. Cao, X. Zhou, H. Wang, Z. Luo, J. Duan, Microstructures and mechanical properties of laser offset welded 5052 aluminum to press-hardened steel, J. Mater. Res. Technol. 9-3 (2020) 5378-5390.
[6] R. Itani, T. Iizuka, Joint Strength of SPCC/A5052P-H Joint Welded by Laser Butt Welding with Compression, Key Eng. Mater. 554-557 (2013) 86-92.
[7] T. Iizuka, S. Kajikawa, N. Takakura, N. Hatanaka, Fundamental formability of SPC/A1100 hybrid sheet welded by butt laser welding, Special Edition: 10th International Conference on Technology of Plasticity, ICTP 2011. (2011) 651-656.
[8] J. Jin, T. Iizuka, Combined-cycle corrosion testing of steel/6000 series aluminum alloys joined by friction welding, ESAFORM 2021. MS05(Joining) (2021).