Nucleation of Proeutectoid Ferrite on Complex Precipitates in Austenite

T. Furuhara, J. Yamaguchi, N. Sugita, G. Miyamoto, T. Maki

Research output: Contribution to journalArticlepeer-review

111 Citations (Scopus)


Effect of various intragranular inclusions or precipitates (MnS, VC and V(C,N)) on the microstructure and kinetics of intragranular ferrite transformation at the temperatures between 973 and 823 K was studied using various Fe-2Mn-(0.13,0.2)C(mass%) alloys with the small addition of sulfur, vanadium, and nitrogen. In Fe-2Mn-0.13C-50ppmS and Fe-2Mn-0.2C-470ppmS alloys, MnS particles, mostly incoherent in austenite, do not act as effective nucleation sites of ferrite. V addition slightly improves the potency of MnS as ferrite nucleation site by forming MnS+VC complex precipitates. The addition of both V and N largely enhances the intragranular nucleation of ferrite idiomorph on the MnS+V(C,N) complex precipitate. It is considered that two factors, i.e., (1) the advantage in the balance of interphase boundary energy and (2) the increase in the fraction of V(C,N) precipitate by the addition of nitrogen, are mainly responsible for the promotion of intragranular ferrite formation on the MnS+V(C,N) complex precipitate.

Original languageEnglish
Pages (from-to)1630-1639
Number of pages10
JournalIsij International
Issue number10
Publication statusPublished - 2003
Externally publishedYes


  • Austenite
  • Carbide
  • Crystallography
  • Ferrite
  • Inclusion
  • Interphase boundary
  • Nitride
  • Phase transformation
  • Precipitation
  • Steel
  • Sulfide

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry


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