Reverse Austenite Transformation Behavior of Equal Channel Angular Pressed Low Carbon Ferrite/Pearlite Steel

Development of Ultrafine Lamellar Ferrite and Austenite Duplex Structure in 0.2C5Mn Steel during ART-annealing

“…This means that the phase transformation from martensite to austenite during annealing process at 650°C was mainly controlled by austenite reverted transformation (ART) as demonstrated in literature. [10][11][12][13] That is the reason why the annealing at 650°C was simply called ART-annealing for 0.2C5Mn steel in this study. It may be pointed out here, there are still some grains with orientations deviated from the ideal orientation significantly, which may caused by the nucleation and growth of equiaxed austenite grains in the packet boundary as shown in Fig.…”

“…So far, several heat treatment methodologies were demonstrated to be capable of introducing austenite islets into the steel matrix, such as the intercritical annealing followed by bainite holding as applied in TRIP steel fabrication, [5][6][7][8] quenching and partitioning (Q&P) to prepare ultrahigh strength steel with relative ductility 9) and austenite reverted transformation from martensite (ART) to produce high strength and high ductility. [10][11][12][13] Amongst these methods, ART-annealing was shown to be able to produce large fractioned austenite and ultrafine grain sized structure. [10][11][12][13]15,16) However, few reports about the phase transformation behavior and microstructure evolution during ART-annealing were reported in literatures.…”

“…[10][11][12][13] Amongst these methods, ART-annealing was shown to be able to produce large fractioned austenite and ultrafine grain sized structure. [10][11][12][13]15,16) However, few reports about the phase transformation behavior and microstructure evolution during ART-annealing were reported in literatures. Specially for the ultrafine grained duplex steel, the measurement of the solution element content and distribution in the matrix and new phase is crucial for us to understand its Partitioned-Local Equilibrium behaviors, 17) which needs to be carried out by scanning transmission electron microscopy (STEM) for its accuracy.…”

Tempering Effects on the Stability of Retained Austenite and Mechanical Properties in a Medium Manganese Steel

“…So the intercritical annealing was applied to get large amount of austenite due to austenite reverted transformation (ART) from martensite, which was named ART-annealing. [8][9][10] Recently, H. L. Yi, et al reported the significant results about ferrite/austenite duplex C-Mn steels, which had excellent mechanical properties with ultimate strength 900 MPa and total elongation 28%.…”

Characterization of Microstructures and Mechanical Properties of Cold-rolled Medium-Mn Steels with Different Annealing Processes

“…tion (ART) annealing. [9][10][11][12][13] It has been reported 13) that ARTannealing of Fe-0.2C-5Mn steel resulted in the microstructure evolution from fully martensite structure to an ultrafine lamellar ferrite and austenite duplex microstructure and the significant difference of Mn concentrations between ferrite lath and austenite lath indicated a strong Mn partitioning during ART-annealing process. It has been verified that the TRIP effect depended on the volume fraction and stability of retained austenite.…”