Title of article :
Production of nano/submicron grained AISI 304L stainless steel through the martensite reversion process
Author/Authors :
Forouzan، نويسنده , , Farnoosh and Najafizadeh، نويسنده , , Abbas and Kermanpur، نويسنده , , Ahmad and Hedayati، نويسنده , , Ali and Surkialiabad، نويسنده , , Roohallah and Hosseini، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2010
Abstract :
Production of nano/submicron grained AISI 304L austenitic stainless steel through formation of strain-induced martensite and its reversion to austenite are studied in this paper. The effects of annealing parameters on the microstructural development and mechanical properties are also investigated. Heavily cold rolling at 0 °C is employed to induce the formation of martensite in the metastable austenitic material, followed by reversion treatment at the temperature range of 700–900 °C for 0.5–300 min. Microstructural evolutions are analyzed using Feritscope, X-ray diffraction, and scanning electron microscopy, whereas the mechanical properties are determined by hardness and tensile tests. The smallest grain size (about 135 nm) is obtained in the specimen annealed at 700 °C for 20 min. The resultant nano/submicron grained steel not only exhibits a high strength level (about 1010 MPa) but also a desirable elongation of about 40%. Moreover, an annealing map is developed which indicates the appropriate range of annealing parameters for grain refinement of AISI 304L stainless steel through the martensite reversion process.
Keywords :
Strain-induced martensite , Nano/submicron grained austenite , reversion , Austenitic stainless steel , Grain refinement , thermo-mechanical processing
Journal title :
MATERIALS SCIENCE & ENGINEERING: A
Journal title :
MATERIALS SCIENCE & ENGINEERING: A