The prediction of the stress relaxation behaviour of welding induced residual stresses in thick section 316H austenitic stainless steel welded component provides an input for quantifying reheat crack initiation observed in the heat affected zone. This cracking occurs after service at temperatures of about 500°C. The present work reviews some of the widely applied stress relaxation models. The advantage and disadvantage of these models are discussed. An improved constitutive equation derived from a forward uniaxial creep deformation law is proposed. The relative importance of the parameters selected in the present improved equation, when compared with experimental data, is discussed. Finally, recommendations for the future work are pointed out.
|Translated title of the contribution||Prediction of creep stress relaxation for 316H austenitic stainless steel at 550°C|
|Title of host publication||International Conference on High Temperature Defect Assessment 5, Guildford|
|Publication status||Published - 2010|