Application of the Local Approach Beremin Criterion to a Carbon-Manganese Ferritic Steel

Abstract Framatome and EDF have initiated an R&D program to assess the impact of residual stresses on fracture initiation in representative welded pipes featuring a non-stress-relief weld and an included crack. The focus is on the upper shelf of the brittle to ductile transition, where material behavior behaves from quasi-brittle to ductile. A review of the literature reveals that most available results pertain to relatively low temperatures, where the effect of welding residual stresses on brittle fracture is significant [1]. However, this temperature domain is less relevant for nuclear applications. Despite this, these findings provide critical insights and valuable guidance for the preparation of new experimental campaigns. This paper investigates the application of the Beremin model to C-Mn steel welds, with a focus on parameter identification using laboratory specimens and validation through structural-scale testing.