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Hot deformation and recrystallisation of low Mn steels with different Ti/N ratio

Journal Article


Abstract


  • The effects of small titanium and nitrogen additions on the mechanical properties and

    microstructural characteristics of four different low carbon, low manganese steels have been

    studied using a Gleeble thermomechanical simulator and TEM investigations. The Ti/N ratio in

    these steels as well as the size and distribution of TiN particles play a major role in determining the

    mechanical properties, the resulting austenite grain size as well as the size of inclusion

    precipitates. The best mechanical properties were obtained in the steel with a Ti/N ratio lower than

    the stoichiometric value. This steel also had the smallest austenite grain size after reheating as

    well as the highest rate of dynamic recrystallisation during hot deformation. The nature and rate of

    recrystallisation seem to be determined by an intricate interplay between the size and distribution

    of titanium nitrides and the prevailing austenite grain size.

Publication Date


  • 2011

Citation


  • Dehghan-Manshadi, A. & Dippenaar, R. J. (2011). Hot deformation and recrystallisation of low Mn steels with different Ti/N ratio. Ironmaking and Steelmaking, 38 (4), 302-308.

Scopus Eid


  • 2-s2.0-79957493774

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3156

Number Of Pages


  • 6

Start Page


  • 302

End Page


  • 308

Volume


  • 38

Issue


  • 4

Abstract


  • The effects of small titanium and nitrogen additions on the mechanical properties and

    microstructural characteristics of four different low carbon, low manganese steels have been

    studied using a Gleeble thermomechanical simulator and TEM investigations. The Ti/N ratio in

    these steels as well as the size and distribution of TiN particles play a major role in determining the

    mechanical properties, the resulting austenite grain size as well as the size of inclusion

    precipitates. The best mechanical properties were obtained in the steel with a Ti/N ratio lower than

    the stoichiometric value. This steel also had the smallest austenite grain size after reheating as

    well as the highest rate of dynamic recrystallisation during hot deformation. The nature and rate of

    recrystallisation seem to be determined by an intricate interplay between the size and distribution

    of titanium nitrides and the prevailing austenite grain size.

Publication Date


  • 2011

Citation


  • Dehghan-Manshadi, A. & Dippenaar, R. J. (2011). Hot deformation and recrystallisation of low Mn steels with different Ti/N ratio. Ironmaking and Steelmaking, 38 (4), 302-308.

Scopus Eid


  • 2-s2.0-79957493774

Ro Metadata Url


  • http://ro.uow.edu.au/engpapers/3156

Number Of Pages


  • 6

Start Page


  • 302

End Page


  • 308

Volume


  • 38

Issue


  • 4