A validated numerical model for residual stress predictions in an eight-pass-welded stainless steel plate
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Date
2014-02-06
Journal Title
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Publisher
Trans Tech Publications
Abstract
Welding processes create a complex transient state of temperature that results in post-weld residual stresses. The current work presents a finite element (FE) analysis of the residual stress distribution in an eight-pass slot weld, conducted using a 316L austenitic stainless steel plate with 308L stainless steel filler metal. A thermal FE model is used to calibrate the transient thermal profile applied during the welding process. Time-resolved body heat flux data from this model is then used in a mechanical FE analysis to predict the resultant post-weld residual stress field. The mechanical analysis made use of the Lemaitre-Chaboche mixed isotropic-kinematic work-hardening model to accurately capture the constitutive response of the 316L weldment during the simulated multi-pass weld process, which results in an applied cyclic thermo-mechanical loading. The analysis is validated by contour method measurements performed on a representative weld specimen. Reasonable agreement between the predicted longitudinal residual stress field and contour measurement is observed, giving confidence in the results of measurements and FE weld model presented.
Description
Keywords
Welding, Residual stresses, Stainless steels, Heat, Elements, Data
Citation
Patel, V. I., Muránsky, O., Hamelin, C. J., Olson, M. D., Hill, M. R., & Edwards, L. (2014). A validated numerical model for residual stress predictions in an eight-pass-welded stainless steel plate. Materials Science Forum, 777, 46-51 doi:10.4028/www.scientific.net/MSF.777.46