Abstract
The 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.
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