Estimation of fracture toughness K_IC from Charpy impact test data in T-welded connections repaired by grinding and wet welding

This work presents, for the first time, and estimation of fracture toughness K_IC correlations from Charpy V-notch (CVN) impact test data extracted from T-welded connections repaired with rectangular grinding and filled by wet welding. To obtain K_IC values, equations based on the yield stress (σ_YS) of the wet welding beads were used. The estimated K_IC data decreased with increasing water depth. These two characteristics (porosity and microstructures for low carbon steels) did not improve the mechanical properties, such as Charpy impact and K_IC values.