Exploring the applicability of the LICON methodology for the creep assessment of a dissimilar metal weld

摘要

The LICON methodology is an approach for predicting the lifetime of materials under creep loading conditions. The LICON method predicts long-time uniaxial creep strength using the results from several short duration creep crack incubation (CCI) tests in conjunction with the outcome of a mechanical analysis for the adopted multiaxial specimen geometry. The applicability of the methodology for long term creep strength prediction of martensitic 9%Cr and bainitic 1%Cr steels has already been demonstrated. This study has examined the applicability of the procedure for predicting long term uniaxial creep strengths for a dissimilar metal weld (DMW). It has required new developments to the original formulation. Application of the developed formulation for predicting uniaxial creep rupture behaviour of the investigated DMW shows an acceptable agreement with experimental observations which was not previously achievable.