Title

THE FEATURES OF AUSTENITE TO FERRITE TRANSFORMATION FOR CARBON STEELS

Authorship

URTSEV, V.; MOROZOV, A.; GORNOSTYREV, YU.; ZALALUTDINOV, M.; KAPTSAN, A.

URTSEV, V.

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MOROZOV, A.

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GORNOSTYREV, YU.

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ZALALUTDINOV, M.

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KAPTSAN, A.

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DOI

10.5151/2594-5327-49v1-251-258

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Abstract

The results of experimental investigations are presented, which demonstrate that in certain range of supercooling the dynamic of the austenite-to-ferrite transition is essentially multi-stage. Ferrite grains of the first generation are nucleated on the austenite grain boundaries. The second and following ferrite grains generations are originated on the Feγ/Feα interphase. It was shown that plastic deformation at the temperatures below Ar₃ increases the rate of Feγ→Feα transition significantly. The conversion degree may essentially exceed the thermodynamically balanced value. Data are presented on the plastic deformation influence on the kinetics of Feγ→Feα transition. It was demonstrated that pulse deformation is an effective method for the polymorphous transformation acceleration.

Keywords

austenite, ferrite, carbon steel, phase transformation, plastic deformation