Impact du soudage sur les propriétés mécaniques des joints en C48.

Abstract

This study analyzes the mechanical behavior of a welded assembly by combining finite element modeling (FEM) under static loading (via ABAQUS) and cyclic loading (via AFGROW). The objective is to identify critical zones—especially the heat-affected zone (HAZ)—and assess their impact on mechanical strength. The results reveal that the HAZ exhibits stress concentrations, plastic deformations, and damage significantly higher than those in the base metal, making it the most vulnerable region. Localized stress gradients were also detected there, confirming the influence of microstructural heterogeneities induced by welding. These observations emphasize the importance of optimizing welding design and process to mitigate stress concentrations in the HAZ, thereby improving the durability of welded structures.