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Metals 2016, 6(1), 8; doi:10.3390/met6010008

Study on Austenitization Kinetics of SA508 Gr.3 Steel Based on Isoconversional Method

Institute of Materials Modification and Modeling, School of Material Science and Engineering, Shanghai Jiaotong University, 800 Dongchuan Road, Shanghai 200240, China
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Academic Editor: Hugo Lopez
Received: 10 November 2015 / Revised: 18 December 2015 / Accepted: 21 December 2015 / Published: 29 December 2015
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Abstract

The austenitization kinetics of SA508 Gr.3 steel during heating was studied using the isoconversional method combined with continuous thermal dilatometric tests for the first time. The model-free austenitization kinetics was built and the effective activation energy as a function of transformed austenite fraction was determined without transformation models. Then, the corresponding regression validation was carried out. The time-temperature-austenitization (TTA) diagram of SA508 Gr.3 steel, which is very difficult to be obtained using experiment measures, was constructed. Finally, the austenitization kinetics in a more realistic case, i.e., under non-constant heating rates, was predicted, which is found to agree well with the experimental results. View Full-Text
Keywords: isoconversional method; austenitization kinetics; SA508 Gr.3 steel; dilatometry; time-temperature-austenitization (TTA) diagram isoconversional method; austenitization kinetics; SA508 Gr.3 steel; dilatometry; time-temperature-austenitization (TTA) diagram
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Luo, X.; Han, L.; Gu, J. Study on Austenitization Kinetics of SA508 Gr.3 Steel Based on Isoconversional Method. Metals 2016, 6, 8.

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