Application of Grain Boundary Engineering for Improved Intergranular Carbide Precipitation Resistance in 304L Stainless Steel

摘要

The correlation between carbide precipitation and grain boundary and triple junction structure in 304L stainless steel, solution treated and annealed at different sensitization temperatures, was investigated using orientation imaging microscopy. It was shown that the experimental observations of immunity to carbide precipitation can be explained with the coincident site lattice model for grain boundaries and Bollmann's disclination model for triple junctions. The application of grain boundary engineering concepts to improve the overall bulk properties, in terms of immunity to carbide precipitation, of 304L stainless steel by controlling its grain boundary character distribution will be discussed.