Effects of Phase Transformation on Distortion and Residual Stress Generated by Laser Beam Welding on High-Strength Steel

Effects of Phase Transformation on Distortion and Residual Stress Generated by Laser Beam Welding on High-Strength Steel

In order to elucidate the effects of phase transformation on distortion and residual stress generated by laser beam welding (LBW) on high-strength steel (HT780), a one-pass bead-on-plate welding experiment was carried out. Then, the experiment was simulated by the thermal elastic-plastic analysis. B...

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Veröffentlicht in:Welding in the world 2012-03, Vol.56 (3-4), p.64-70
Hauptverfasser: Kim, You-Chul, Hirohata, Mikihito, Inse, Koutarou
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Chemistry and Materials Science
Materials Science
Metallic Materials
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Solid Mechanics
Theoretical and Applied Mechanics
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creator Kim, You-Chul
Hirohata, Mikihito
Inse, Koutarou
description In order to elucidate the effects of phase transformation on distortion and residual stress generated by laser beam welding (LBW) on high-strength steel (HT780), a one-pass bead-on-plate welding experiment was carried out. Then, the experiment was simulated by the thermal elastic-plastic analysis. Because the mechanical properties in the phase transformation range could not be specified, they were idealized while considering the transformation expansion and the transformation superplasticity in the simulation of the experiment. The validity of the treatment of the mechanical properties in the phase transformation range was verified. It was elucidated that welding distortion and residual stress were largely affected by the phase transformation in the cooling process, although the bead width of LBW was extremely narrow, Angular distortion and tensile residual stress in the weld metal were largely released by the phase transformation.
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subjects Chemistry and Materials Science
Materials Science
Metallic Materials
Peer-Reviewed Section
Solid Mechanics
Theoretical and Applied Mechanics
title Effects of Phase Transformation on Distortion and Residual Stress Generated by Laser Beam Welding on High-Strength Steel
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