OJMetal  Vol.4 No.2 , June 2014
FEM Simulation of Distortion and Residual Stress Generated by High Energy Beam Welding with Considering Phase Transformation
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.

Cite this paper
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.
References
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[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.

 
 
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