Modeling of reversible gamma/alpha transformations of low carbon steels in the intercritical temperature range


Reti T., Felde I., Gur H.

14th Congress of the International-Federation-for-Heat-Treatment-and-Surface-Engineering, Shanghai, China, 26 - 28 October 2004, pp.702-705 identifier

  • Publication Type: Conference Paper / Full Text
  • City: Shanghai
  • Country: China
  • Page Numbers: pp.702-705

Abstract

A phenomenological kinetic model has been developed for the prediction of non-isothermal reversible incomplete transformations in low-carbon hypoeutectoid steels. The theoretical basis of the proposed method has its origin in a possible extension of the traditional Austin-Rickett kinetic differential equation. To critically assess the applicability of the model, a number of experiments based on computer simulations have been performed to predict the austenite/ferrite proeutectoid transformation in the temperature range of A(e1) to A(e3) on plain carbon hypoeutectoid steels. A comparison with published experimental data has verified that the model developed is reasonable both quantitatively and with respect to well-established trends. Extension of the method of prediction appears promising when the non-isothermal reactions occurring during heat treatment (such as carbide precipitation and dissolution) can be assumed to proceed in a reversible manner.