Effect of Grain Boundary Serration on the Tensile properties of the Super 304H Heat Resistant Austenitic Stainless Steel

Abstract

Grain boundary serrations were produced in heat-resistant austenitic stainless steel containing Cu by applying after solution heat-treatment a holding time in the range 700-800 degrees C between 30 minutes to 3 hours. These special treatments provide an enhancement of the tensile ductility of about 40 and 113%at room temperature and 750 degrees C, respectively, while no significant change in the yield stress and tensile strength could be observed.