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Effect of Laser Welding Sequences on Residual Stresses and Distortion of DP600 Steel Joints

  • M. A. Carrizalez-Vazquez (a1) and G. Y. Pérez-Medina (a1)

Abstract

Different materials have been welded by laser beam. This process allows to obtain high quality welds with lower thermal effect. Laser beam welding produces narrow and high penetration welds without filler material. However, this process modifies the mechanical and microstructural properties of the welded joints. Therefore, this is currently a research topic, mainly using Advanced High Strength Steel (AHSS). These materials are used in the automotive industry. As a result, it is important to study the thermometallurgical and mechanical behavior of welded steels. In addition, a tool used to approximate the thermal effect in the fusion zone (FZ) and heat affected zone (HAZ) has been the computational numerical simulation. In this work, two butt joints of DP600 steel plates of 200 mm x 150 mm and 2 mm thickness with different welding sequences were simulated using the SYSWELD finite element software. The results of both coupons were compared and it was determined that the distortion and residual stresses decreased in the second coupon by applying a different welding sequence with equal heat input.

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Keywords

Effect of Laser Welding Sequences on Residual Stresses and Distortion of DP600 Steel Joints

  • M. A. Carrizalez-Vazquez (a1) and G. Y. Pérez-Medina (a1)

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