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Open AccessArticle

Combined Effects of Deformation and Undercooling on Isothermal Bainitic Transformation in an Fe-C-Mn-Si Alloy

1
The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, China
2
HBIS Group Technology Research Institute, Hebei Iron and Steel Group Co., Ltd., Shijiazhuang 05000, China
*
Author to whom correspondence should be addressed.
Metals 2019, 9(2), 138; https://doi.org/10.3390/met9020138
Received: 11 January 2019 / Revised: 22 January 2019 / Accepted: 24 January 2019 / Published: 27 January 2019
(This article belongs to the Special Issue Development of Bainitic Steels)
Both ausforming and transformation temperature affect the successive bainitic transformation and microstructure. The individual influence of each case is clear, whereas the combined effects are still unknown. Thermomechanical simulation and metallography were used to investigate the combined effects of ausforming and transformation temperature on bainitic transformation and microstructure. The kinetics of isothermal bainitic transformation in non-deformed and deformed materials was analyzed. A lower transformation temperature can lead to more bainite formation without deformation. However, ausforming with small strains can partially compensate for the decrease of bainite amount caused by the decreased undercooling. The larger the applied strain is, the smaller the difference between the final amounts of bainite with different undercooling. Ausforming at a relatively higher temperature is more favorable to the acceleration of subsequent isothermal bainitic transformation. The results in the present work provide reference for optimizing the fabrication technology of medium-carbon nanobainite steels. View Full-Text
Keywords: ausforming; bainitic transformation; microstructure; transformation temperature ausforming; bainitic transformation; microstructure; transformation temperature
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MDPI and ACS Style

Zou, H.; Hu, H.; Xu, G.; Xiong, Z.; Dai, F. Combined Effects of Deformation and Undercooling on Isothermal Bainitic Transformation in an Fe-C-Mn-Si Alloy. Metals 2019, 9, 138.

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