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Thermo-mechanical processing of TRIP-aided steels

journal contribution
posted on 2023-10-26, 03:22 authored by R Ranjan, Hossein BeladiHossein Beladi, S B Singh, Peter HodgsonPeter Hodgson
© 2015, The Minerals, Metals & Materials Society and ASM International. The effects of the partial replacement of Si with Al and the addition of P on the microstructure and mechanical properties of experimental TRIP-aided steels subjected to different thermo-mechanical cycles were studied. Based on the available literature and thermodynamics-based calculations, three steels with different compositions were designed to obtain optimum results from a relatively low number of experiments. Different combinations of microstructure were developed through three different kinds of thermo-mechanical-controlled processing (TMCP) routes, and the corresponding tensile properties were evaluated. The results indicated that partial replacement of Si with Al improved the strength-ductility balance along with providing an improved variation in the incremental change in the strain-hardening exponent. However, the impact of the P addition was found to depend more on the final microstructure obtained by the different TMCP cycles. It has also been shown that an increase in the volume fraction of the retained austenite ($$ V_{{gamma_{text{ret}} }} $$Vγret) or its carbon content ($$ C_{{gamma_{text{ret}} }} $$Cγret) resulted in an improved strength-ductility balance, which can be attributed to better exploitation of the TRIP effect.

History

Journal

Metallurgical and materials transactions a: physical metallurgy and materials science

Volume

46

Pagination

3232 - 3247

Location

New York, N.Y.

ISSN

1543-1940

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2015, Springer Verlag