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

被引：0
|
作者：
You-Chul Kim
Mikihito Hirohata
Koutarou Inse
机构：
[1] Osaka University,Joining and Welding Research Institute
[2] Nagoya University,Graduate School of Engineering
[3] IHI Corporation,undefined
来源：
Welding in the World | 2012年 / 56卷
关键词：
Distortion; Elastoplastic analysis; High strength steels; Laser welding; Phase diagrams; Residual stresses; Transformation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
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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页码：64 / 70
页数：6
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