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Microstructure evolution during isochronal annealing of a 42% cold rolled TRIP-TWIP steel

Journal Article


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Abstract


  • A high manganese TRIP-TWIP steel was cold rolled to 42% thickness reduction and isochronally annealed between 600 to 900 °C for 300 s. The microstructural evolution during annealing was studied by high resolution electron back-scattering diffraction. After cold rolling, the steel comprised predominant fraction of α′-martensite, a small fraction of blocky ε-martensite and a trace fraction of retained austenite (γ). During annealing, the reversion of ε and α′ martensite to γ was followed by the recrystallisation of γ. While the processes of reversion to and recrystallisation of γ were completed by 700 °C, further annealing between 750 to 900 °C led to γ grain growth. A novel method to delineate the γ-γ grain boundaries was developed in order to accurately quantify γ grain size and subsequently the activation energy for γ grain growth.

Publication Date


  • 2015

Citation


  • Pramanik, S., Saleh, A. A., Santos, D. B., Pereloma, E. V. & Gazder, A. A. (2015). Microstructure evolution during isochronal annealing of a 42% cold rolled TRIP-TWIP steel. IOP Conference Series: Materials Science and Engineering, 89 012042-1-012042-8.

Scopus Eid


  • 2-s2.0-84941247984

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=5303&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/4282

Start Page


  • 012042-1

End Page


  • 012042-8

Volume


  • 89

Abstract


  • A high manganese TRIP-TWIP steel was cold rolled to 42% thickness reduction and isochronally annealed between 600 to 900 °C for 300 s. The microstructural evolution during annealing was studied by high resolution electron back-scattering diffraction. After cold rolling, the steel comprised predominant fraction of α′-martensite, a small fraction of blocky ε-martensite and a trace fraction of retained austenite (γ). During annealing, the reversion of ε and α′ martensite to γ was followed by the recrystallisation of γ. While the processes of reversion to and recrystallisation of γ were completed by 700 °C, further annealing between 750 to 900 °C led to γ grain growth. A novel method to delineate the γ-γ grain boundaries was developed in order to accurately quantify γ grain size and subsequently the activation energy for γ grain growth.

Publication Date


  • 2015

Citation


  • Pramanik, S., Saleh, A. A., Santos, D. B., Pereloma, E. V. & Gazder, A. A. (2015). Microstructure evolution during isochronal annealing of a 42% cold rolled TRIP-TWIP steel. IOP Conference Series: Materials Science and Engineering, 89 012042-1-012042-8.

Scopus Eid


  • 2-s2.0-84941247984

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=5303&context=eispapers

Ro Metadata Url


  • http://ro.uow.edu.au/eispapers/4282

Start Page


  • 012042-1

End Page


  • 012042-8

Volume


  • 89