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Journal of Materials Science

, Volume 42, Issue 15, pp 5982–5990 | Cite as

Weldment properties evaluation and formability study of tailor-welded blanks of different thickness combinations and welding orientations

  • C. H. Cheng
  • L. C. Chan
  • C. L. Chow
Article

Abstract

Tailor-welded Blanks (TWBs) are tailor-made for different complex component designs by welding multiple metal sheets with different thicknesses, shapes or strengths prior to forming. However, the forming performance of an intrinsic TWB is critically related to its own structures and designs, such as the thickness combination, as well as the location and orientation of weldment. In this study, a 2 kW Nd:YAG laser were used to butt-weld approximately 180 samples of stainless steel (AISI 304) TWBs with different dimensions (i.e., from 12.7 mm to 165.1 mm in width), thickness combinations (i.e., 1.0/1.0 mm, 1.0/1.2 mm, 1.0/1.5 mm, 1.2/1.2 mm, 1.2/1.5 mm and 1.5/1.5 mm) and welding orientations (i.e., 0°, 45° and 90°). Subsequently, Swift forming tests were carried out to characterize the forming performance of those TWBs. Obviously, the optimal sets of welding parameters relating critically to the quality of weld was a primary criterion for the formability test of TWBs in this study. The effects of different thickness combinations on the formability of TWBs were investigated through the constructed forming limit diagrams (FLDs). The results showed that the thinner part of TWBs dominated the majority of deformation similar to the FLD of the parent metal. The effects of different welding orientations on the forming performance of TWBs were examined from the failure analysis.

Keywords

Welding Base Metal Welding Speed Welding Parameter Dome Height 

Notes

Acknowledgements

The authors would like to thank the Central Research Grant of the Hong Kong Polytechnic University for supporting this project (Project Code: R-GAP). Partial results of the paper were presented in the “LTWMP 2005 Conference” in May 2005 in Ukraine.

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Department of Industrial and Systems EngineeringThe Hong Kong Polytechnic UniversityKowloonHong Kong, China
  2. 2.Department of Mechanical EngineeringUniversity of Michigan-DearbornDearbornUSA

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