Metallurgical and Materials Transactions A

, Volume 35, Issue 12, pp 3693–3700 | Cite as

Role of carbon and alloying elements in the formation of bainitic ferrite

  • M. Hillert
  • L. Höglund
  • J. Ågren


One approach to the prediction of the carbon content of austenite, remaining after the precipitation of bainitic ferrite, is based on the assumption that bainitic ferrite during growth inherits the carbon content of the parent austenite. An alternative approach is based on the assumption that bainitic ferrite grows with a low carbon content and there is no major difference between Widmanstätten ferrite and bainitic ferrite. The two approaches are now compared using information from alloyed steels with considerable amounts of Si, where the formation of cementite is retarded. The former approach does not account for the effect of Mn and fails severely at low alloy contents. The latter approach seems more promising but is not without difficulties. In particular, in order to explain the effects of Cr and Mo, it seems necessary to introduce a kinetic effect, presumably caused by solute drag.


Ferrite Austenite Material Transaction Cementite Bainite 
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Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2004

Authors and Affiliations

  • M. Hillert
    • 1
  • L. Höglund
    • 1
  • J. Ågren
    • 1
  1. 1.the Department of Materials Science and EngineeringKTHStockholmSweden

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