Effect of the welding procedure on the deformation of superposed welds of a low carbon steel

Rafael Humberto Mota de Siqueira; Sheila Medeiros de Carvalho; Milton Sergio Fernandes de Lima

doi:10.59400/mtr.v1i1.288

Effect of the welding procedure on the deformation of superposed welds of a low carbon steel

Rafael Humberto Mota de Siqueira Photonics Division, Institute for Advanced Studies
Sheila Medeiros de Carvalho Department of Mechanical Engineering, Federal University of Espirito Santo
Milton Sergio Fernandes de Lima Photonics Division, Institute for Advanced Studies; Thematic Network in Materials Engineering, Federal University of Ouro Preto

Article ID: 288

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DOI: https://doi.org/10.59400/mtr.v1i1.288

Keywords: gas-metal arc welding, laser beam welding, low-carbon steel, automotive

Abstract

This study compared gas-metal arc welding (GMAW) and laser beam welding (LBW) for the superposed joining of two low-carbon steels. The motivation was to reduce the visible defects (notches) in the external part of one of the sheets. Both welding processes produced sound welds characterized by ferrite and pearlite; however, the notch disappeared when LBW was used. The hardness values of the fusion and heat-affected zones were similar for both processes, but the tensile strengths were very different. The shear tensile strengths of the LBW and GMAW were 415 and 84 MPa, respectively. Finite element analysis simulations indicated a more diffuse distribution of the von Mises stress throughout the welded component. The GMAW FEA model also presented a defect because of excessive heat transfer and residual stresses. In conclusion, LBW can replace GMAW in this particular case with improvements in appearance, productivity, and mechanical strength.

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Published

2023-12-19

How to Cite

de Siqueira, R. H. M., de Carvalho, S. M., & de Lima, M. S. F. (2023). Effect of the welding procedure on the deformation of superposed welds of a low carbon steel. Materials Technology Reports, 1(1), 288. https://doi.org/10.59400/mtr.v1i1.288

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