Grain boundary engineering of metastable 204Cu, 301, and 301LN austenitic stainless steels to improve their sensitization resistance

摘要: Grain boundary engineering (GBE) of 304 and 316 austenitic stainless steels has been widely researched but studies on other grades are less common. In this study, application GBE metastable 204Cu, 301, 301LN was assessed. Thermomechanical processing parameters were obtained for each the tested steel by varying cold rolling reduction annealing temperature, analyzing acquired grain character distributions (GBCD) in scanning electron microscope (SEM) with backscatter diffraction (EBSD). A high fraction about 80% low-Σ CSL boundaries attained all steels. Effect GBE-treatments sensitization intergranular corrosion properties studied Streicher DL-EPR tests. GBE-treating found to beneficially decrease rate 204Cu 301 steels, low-carbon no improvement observed.