An attempt is made to rationalise some contradictory observations on the effect of austenite grain size on the overall kinetics of the bainite transformation in steels. Experiments have been carried out on two steels which show opposite effects of austenite grain size on the reaction rate. General equations describing the reaction rate are derived by taking into account the morphology of the bainite in each steel. The equations derived can explain the contradictory effects of the austenite grain size on the overall reaction rate. The results are also found to be in good agreement with the published data.
Get full access to this article
View all access options for this article.
References
1.
BARFORDJ. and OWENw. S.: J. Iron Steel Inst., 1961, 197, 146–151.
2.
UMEMOTOM., HORIUCHIK., and TAMURAI.: Trans. Iron Steel Inst. Jpn, 1982,22, 854–861.
3.
DAVENPORTA. S.: Trans. AIME, 1941, 145, 301–314.
4.
GRAHAML. W. and AXONH. J.: J. Iron Steel Inst., 1959, 191,361–365.
5.
COTTRELLS. A. and KOT.: J. Iron Steel Inst., 1953, 173,224–228.
6.
WINTERTONK.: J. Iron Steel Inst., 1945, 151,79–85.
7.
UMEMOTOM., FURUHARAT. and 1. TAMURA: Acta Metall., 1986, 34,2235–2245.
8.
MATSUZAKIA., BHADESHIAH. K. D. H., and AMANOK.: in Proc. Symp. on �Atomic arrangement design and control for new materials�, Tsukuba, Japan, November 1994, Research and Development Corp. of Japan/University of Cambridge/ National Research Institute for Metals,32–33.
9.
MATSUZAKIA., BHADESHIAH. K. D. H., and AMANOK.: Zairy0 to Purosesu (Curr. Adv. Mater. Process.), 1995, 8, 783.
10.
TAKAHASHIM. and BHADESHIAH. K. D. H.: J. Mater. Sci. Lett., 1989, 8, 477–478.
