FEM Simulation of Distortion and Residual Stress Generated by High Energy Beam Welding with Considering Phase Transformation

Y.-C. Kim; M. Hirohata; K. Inose

doi:10.4236/ojmetal.2014.42004

Home > Journals > Chemistry & Materials Science > OJMetal

Open Journal of Metal > Vol.4 No.2, June 2014

FEM Simulation of Distortion and Residual Stress Generated by High Energy Beam Welding with Considering Phase Transformation ()

Y.-C. Kim, M. Hirohata, K. Inose

Graduate School of Engineering, Nagoya University, Nagoya, Japan.
IHI Corporation, Yokohama, Japan.
Osaka University, Osaka, Japan.

DOI: 10.4236/ojmetal.2014.42004 PDF HTML 4,696 Downloads 5,786 Views Citations

Abstract

A series of experiments was carried out so as to elucidate the effect of the phase transformation in the cooling process on welding distortion and residual stress generated by laser beam welding (LBW) and laser-arc hybrid welding (HYBW) on the high strength steel (HT780). Then, the experiments were simulated by 3D thermal elasticplastic analysis with FEM (Finite Element Method) which was performed with using the idealized mechanical properties considering the transformation superplasticity. From the results, the effects of the phase transformation on welding distortion and residual stress generated by LBW and HYBW were elucidated. Furthermore, the generality of the idealization of the mechanical properties was verified.

Keywords

Welding Distortion, Residual Stress, Laser Beam Welding, Laser-Arc Hybrid Welding, Phase Transformation, FEM

Share and Cite:

Kim, Y. , Hirohata, M. and Inose, K. (2014) FEM Simulation of Distortion and Residual Stress Generated by High Energy Beam Welding with Considering Phase Transformation. Open Journal of Metal, 4, 31-39. doi: 10.4236/ojmetal.2014.42004.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Inose, K., Lee, J.-Y., Nakanishi, Y. and Kim, Y.-C. (2008) Characteristics of Welding Distortion/Residual Stress Generated by Fillet Welding with Laser Beam and Verification of Generality of Its High Accurate Prediction. Quarterly Journal of the Japan Welding Society, 26, 61-66. (in Japanese)
[2]	John, S.V. (2001) Superplasticity: Mechanisms and Application. Journal of the Minerals, Metals and Materials Society, 53, 22.
[3]	Kim, Y.-C., Hirohata, M. and Hageyama, Y. (2009) Modeling of Phase Transformation in Cooling Process and Verification of Its Validity. Conference on High Strength Steel for Hydropower Plants, Takasaki, 20-22 July 2009, 15.1- 15.4.
[4]	Kim, Y.-C., Hirohata, M. and Inose, K. (2012) Effects of Phase Transformation on Distortion and Residual Stress Generated by LBW of High Strength Steel. Welding in the World, 56, 64-70.
[5]	Kim, Y.-C., Hirohata, M. and Inose, K. (2011) Modeling of Laser-Arc Hybrid Welding Considered Phase Transformation. 64th Annual Assembly of International Institute of Welding (IIW), Chennai, 17-22 July 2011, XV-1380-11.
[6]	Kim, Y.-C., Lee, J.-Y. and Inose, K. (2010) Determination of Dominant Factors in High Accuracy Prediction of Welding Distortion. Welding in the World, 54, 234-240.