Modelling upper and lower bainite trasformation in steels

M. Azuma, N. Fujita, M. Takahashi, Takehide Senuma, D. Quidort, T. Lung

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Bainite is of considerable importance in the design of high strength steels. There are two types of morphologies, upper and lower bainite. In upper bainite, cementite forms between adjacent bainitic ferrite plates. In certain steels, however, the cementite reaction is suppressed so that carbon-enriched austenite remains untransformed between bainitic ferrite plates. In lower bainite, cementite also has the opportunity to precipitate within bainitic ferrite plates. In order to model the development of these microstructures, it is necessary to treat the simultaneous formation of both the ferritic and carbide components of the microstructure. A theory has been developed to do exactly this, enabling the estimation of the phase fractions, the cementite particle size and the transition from upper to lower bainite. The results have been compared against experimental data.

Original languageEnglish
Pages (from-to)221-228
Number of pages8
JournalISIJ International
Volume45
Issue number2
DOIs
Publication statusPublished - 2005
Externally publishedYes

Fingerprint

Bainite
Steel
Ferrite
Microstructure
High strength steel
Austenite
Carbides
Precipitates
Carbon
Particle size

Keywords

  • Austenite
  • Bainitic ferrite
  • Cementite
  • Simultaneous reaction
  • Upper/lower bainite

ASJC Scopus subject areas

  • Metals and Alloys

Cite this

Azuma, M., Fujita, N., Takahashi, M., Senuma, T., Quidort, D., & Lung, T. (2005). Modelling upper and lower bainite trasformation in steels. ISIJ International, 45(2), 221-228. https://doi.org/10.2355/isijinternational.45.221

Modelling upper and lower bainite trasformation in steels. / Azuma, M.; Fujita, N.; Takahashi, M.; Senuma, Takehide; Quidort, D.; Lung, T.

In: ISIJ International, Vol. 45, No. 2, 2005, p. 221-228.

Research output: Contribution to journalArticle

Azuma, M, Fujita, N, Takahashi, M, Senuma, T, Quidort, D & Lung, T 2005, 'Modelling upper and lower bainite trasformation in steels', ISIJ International, vol. 45, no. 2, pp. 221-228. https://doi.org/10.2355/isijinternational.45.221
Azuma, M. ; Fujita, N. ; Takahashi, M. ; Senuma, Takehide ; Quidort, D. ; Lung, T. / Modelling upper and lower bainite trasformation in steels. In: ISIJ International. 2005 ; Vol. 45, No. 2. pp. 221-228.
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