Time-Temperature-Transformation Diagram within the Bainitic Temperature Range in a Medium Carbon Steel
- 1 January 2004
- journal article
- Published by Japan Institute of Metals in MATERIALS TRANSACTIONS
- Vol. 45 (12), 3272-3281
- https://doi.org/10.2320/matertrans.45.3272
Abstract
The time-temperature-transformation (ITT) diagram within the medium temperature range of medium carbon steel has been determined. A single type of C-curve is found within the bainite temperature range for the studied steel. Distinct reaction C-curves were not observed for both types of microstructure, upper bainite and lower bainite in the TTT diagram. Experimental results on the kinetics of the isothermal formation of bainite at different temperature have demonstrated that both type of microstructure, upper and lower bainite, possesses similar overall transformation kinetics. Some applications of phase transformation theory towards the formation of bainitic microstructures are discussed, with particular emphasis on the bainite start temperature, transition temperature from upper to lower bainite, martensite start temperature and the thickness of bainitic plates.Peer RevieweKeywords
This publication has 29 references indexed in Scilit:
- Application of dilatometric analysis to the study of solid–solid phase transformations in steelsMaterials Characterization, 2002
- Determination of Ms Temperature in Steels: A Bayesian Neural Network Model.ISIJ International, 2002
- A Model of Isothermal and Non Isothermal Transformation Kinetics of Bainite in 0.5% C Steels.ISIJ International, 2002
- Metallographic techniques for the determination of the austenite grain size in medium-carbon microalloyed steelsMaterials Characterization, 2001
- Estimation of bainite plate-thickness in low-alloy steelsMaterials Science and Engineering: A, 1998
- Kinetics of F.C.C. → B.C.C. heterogeneous martensitic nucleation—I. The critical driving force for athermal nucleationActa Metallurgica et Materialia, 1994
- Carbon content of austenite in isothermally transformed 300M steelMaterials Science and Engineering: A, 1994
- Transformation Kinetics of Bainite during Isothermal Holding and Continuous CoolingTransactions of the Iron and Steel Institute of Japan, 1982
- A rationalisation of shear transformations in steelsActa Metallurgica, 1981
- A new computer program for Rietveld analysis of X-ray powder diffraction patternsJournal of Applied Crystallography, 1981