Effect of Uniaxial Compressive Stress on Phase Transformation Kinetics of Low-Carbon Steel
1
China Productivity Center for Machinery, China Academy of Machinery Science and Technology, Beijing 100048, China
2
School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China
*
Author to whom correspondence should be addressed.
†
These authors contributed equally to this work.
Academic Editor: Federico Mazzucato
Materials 2022, 15(13), 4477; https://doi.org/10.3390/ma15134477
Received: 13 May 2022
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Revised: 15 June 2022
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Accepted: 17 June 2022
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Published: 25 June 2022
(This article belongs to the Section Metals and Alloys)
To attain microstructure transformation and the kinetics of phase transformation under stress during the annealing process, dilatometric curves of phase transformation for Q235 steel were tested using a Gleeble-3500 thermal-mechanical simulator under different uniaxial compressive stresses. The Johnson–Mehl–Avrami (JMA) model considering impingement correction was applied to study the phase-transformation kinetics during annealing. The results showed that the grain size increased with increasing uniaxial compressive stresses because it provided additional energy for grain growth. Furthermore, the interfacial migration velocity decreased with increasing stress owing to grain coarsening and a decrease in the density of the α/γ boundary. Meanwhile, the stress reduces the sum of the misfit accommodation energy and interface energy caused by the transformation, and the driving force required for the transformation of austenite to ferrite decreases. Hence, it was concluded that uniaxial compressive stress plays a complex role in the phase transformation, which inhibits interfacial migration and the transformation rate while providing additional energy for the transformation.
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Keywords:
uniaxial compressive stress; dilatometric curves; lever principle; the Johnson–Mehl–Avrami (JMA) model
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MDPI and ACS Style
Zuo, S.; Cheng, P.; Wang, D.; Du, B.; Guan, K.; Zhang, J. Effect of Uniaxial Compressive Stress on Phase Transformation Kinetics of Low-Carbon Steel. Materials 2022, 15, 4477. https://doi.org/10.3390/ma15134477
AMA Style
Zuo S, Cheng P, Wang D, Du B, Guan K, Zhang J. Effect of Uniaxial Compressive Stress on Phase Transformation Kinetics of Low-Carbon Steel. Materials. 2022; 15(13):4477. https://doi.org/10.3390/ma15134477
Chicago/Turabian StyleZuo, Shanchao, Peng Cheng, Decheng Wang, Bing Du, Keming Guan, and Jing Zhang. 2022. "Effect of Uniaxial Compressive Stress on Phase Transformation Kinetics of Low-Carbon Steel" Materials 15, no. 13: 4477. https://doi.org/10.3390/ma15134477
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