Accurate prediction of residual stress in stainless steel welds

Smith, M. C.; Bouchard, P. J.; Turski, M.; Edwards, L. and Dennis, R. J. (2012). Accurate prediction of residual stress in stainless steel welds. Computational Materials Science, 54 pp. 312–328.

DOI: https://doi.org/10.1016/j.commatsci.2011.10.024

Abstract

Measurements of stress–strain properties and residual stress in purpose-designed one and three-pass groove-weld specimens are used to optimise a mixed hardening constitutive model for simulating residual stresses in austenitic Type 316 stainless steel weldments. It is demonstrated that isotropic hardening over-predicts the tensile magnitude of welding residual stress in the benchmark specimens, while pure kinematic hardening gives an under-prediction of longitudinal stresses in parent material close to the weld. The most accurate predictions are those based on optimised mixed isotropic–kinematic formulations combined with a multi-pass moving heat source welding analysis.

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