Effect of Warm Rolling on the Evolution of Microstructure, Microtexture and Mechanical Properties of Commercial Grade Duplex Steel

AbstractThe effect of warm rolling on the evolution of microstructure, microtexture and mechanical properties of a duplex stainless steel (DSS) was investigated. For this purpose, the DSS alloy was warm rolled at 625°C up to 90% reduction of thickness. Development of ultrafine lamellar morphology with alternate arrangement of the two phases was revealed during warm rolling. The ferrite in DSS developed stronger RD-fiber (RD//<110>) than ND-fiber (ND//<111>) while austenite in DSS showed pure metal or copper type texture. The DSS in the as warm-rolled condition showed tremendous increase in ultimate tensile strength to∼1.4GPa. The present results demonstrate that warm rolling can be used successfully for developing ultrahigh strength DSS