Ultrafine Grain Ferrite Transformed from Fine Austenite Grains Produced by Dynamic Reversal Transformation

The medium carbon steel warm deformation was carried out in a Gleeble-3500 simulator, and the microstructure was observed on a scan electron microscopy (SEM) and optical microscope (OM). The results show that the dynamic reversal transformation (DRT) of austenite occurred during the multipass deform...

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Autores principales: Li, Hongbin, Zheng, Xiaoping, Fan, Lifeng, Xu, Haiwei, Tian, Yaqiang, Dai, Xin, Chen, Liansheng
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9784211/
https://www.ncbi.nlm.nih.gov/pubmed/36556533
http://dx.doi.org/10.3390/ma15248727
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author Li, Hongbin
Zheng, Xiaoping
Fan, Lifeng
Xu, Haiwei
Tian, Yaqiang
Dai, Xin
Chen, Liansheng
author_facet Li, Hongbin
Zheng, Xiaoping
Fan, Lifeng
Xu, Haiwei
Tian, Yaqiang
Dai, Xin
Chen, Liansheng
author_sort Li, Hongbin
collection PubMed
description The medium carbon steel warm deformation was carried out in a Gleeble-3500 simulator, and the microstructure was observed on a scan electron microscopy (SEM) and optical microscope (OM). The results show that the dynamic reversal transformation (DRT) of austenite occurred during the multipass deformation at a temperature of 675 °C. The austenite grain size is about 3.4 μm at the stain of 2.67. The thermodynamics was discussed based on the stress activation model. The critical stress of DRT is in the range of 265.94–294.28 MPa, which is related to the Schmit factor, without considering the distortion energy. Meanwhile, the submicron ferrite was obtained after the air cooling stage. The texture of the ultrafine ferrite possessed the characteristics of good, deep drawing properties.
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spelling pubmed-97842112022-12-24 Ultrafine Grain Ferrite Transformed from Fine Austenite Grains Produced by Dynamic Reversal Transformation Li, Hongbin Zheng, Xiaoping Fan, Lifeng Xu, Haiwei Tian, Yaqiang Dai, Xin Chen, Liansheng Materials (Basel) Article The medium carbon steel warm deformation was carried out in a Gleeble-3500 simulator, and the microstructure was observed on a scan electron microscopy (SEM) and optical microscope (OM). The results show that the dynamic reversal transformation (DRT) of austenite occurred during the multipass deformation at a temperature of 675 °C. The austenite grain size is about 3.4 μm at the stain of 2.67. The thermodynamics was discussed based on the stress activation model. The critical stress of DRT is in the range of 265.94–294.28 MPa, which is related to the Schmit factor, without considering the distortion energy. Meanwhile, the submicron ferrite was obtained after the air cooling stage. The texture of the ultrafine ferrite possessed the characteristics of good, deep drawing properties. MDPI 2022-12-07 /pmc/articles/PMC9784211/ /pubmed/36556533 http://dx.doi.org/10.3390/ma15248727 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Li, Hongbin
Zheng, Xiaoping
Fan, Lifeng
Xu, Haiwei
Tian, Yaqiang
Dai, Xin
Chen, Liansheng
Ultrafine Grain Ferrite Transformed from Fine Austenite Grains Produced by Dynamic Reversal Transformation
title Ultrafine Grain Ferrite Transformed from Fine Austenite Grains Produced by Dynamic Reversal Transformation
title_full Ultrafine Grain Ferrite Transformed from Fine Austenite Grains Produced by Dynamic Reversal Transformation
title_fullStr Ultrafine Grain Ferrite Transformed from Fine Austenite Grains Produced by Dynamic Reversal Transformation
title_full_unstemmed Ultrafine Grain Ferrite Transformed from Fine Austenite Grains Produced by Dynamic Reversal Transformation
title_short Ultrafine Grain Ferrite Transformed from Fine Austenite Grains Produced by Dynamic Reversal Transformation
title_sort ultrafine grain ferrite transformed from fine austenite grains produced by dynamic reversal transformation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9784211/
https://www.ncbi.nlm.nih.gov/pubmed/36556533
http://dx.doi.org/10.3390/ma15248727
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