Bainite transformation under the effect of large stress in a carbide-free bainite steel
The effects of large stress on bainite transformation and microstructure were investigated by dilatometry, SEM and EBSD. The results show that the effect of large stress on bainite transformation includes two parts: mechanical driving force and prior deformation. A new finding is that bainite transf...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423012115 |
| _version_ | 1797745233201463296 |
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| author | Mingxing Zhou Junyu Tian Wei Wang Jun Wu Zhengliang Xue Guang Xu |
| author_facet | Mingxing Zhou Junyu Tian Wei Wang Jun Wu Zhengliang Xue Guang Xu |
| author_sort | Mingxing Zhou |
| collection | DOAJ |
| description | The effects of large stress on bainite transformation and microstructure were investigated by dilatometry, SEM and EBSD. The results show that the effect of large stress on bainite transformation includes two parts: mechanical driving force and prior deformation. A new finding is that bainite transformation is inhibited by large stress when the negative effect of prior deformation surpasses the positive effect of mechanical driving force. In addition, the bainite transformation kinetics model established by van Bohemen and Sietsma is modified to describe the bainite transformation under the effect of stress more accurately. Moreover, significant variant selection occurs under the effect of large stress, but the selected bainite variants in adjacent austenite twins are different. Furthermore, the hardness of the steel increases with the stress because of the increase in dislocation density and martensite amount. |
| first_indexed | 2024-03-12T15:20:27Z |
| format | Article |
| id | doaj.art-017902a3dc3a41a381743b640bb7682b |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-12T15:20:27Z |
| publishDate | 2023-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-017902a3dc3a41a381743b640bb7682b2023-08-11T05:33:02ZengElsevierJournal of Materials Research and Technology2238-78542023-07-0125241251Bainite transformation under the effect of large stress in a carbide-free bainite steelMingxing Zhou0Junyu Tian1Wei Wang2Jun Wu3Zhengliang Xue4Guang Xu5The State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, China; Corresponding author.Central Research Institute of BaoShan Iron & Steel Co., Ltd., Shanghai, 201900, China; Corresponding author.The State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan, 430081, ChinaThe effects of large stress on bainite transformation and microstructure were investigated by dilatometry, SEM and EBSD. The results show that the effect of large stress on bainite transformation includes two parts: mechanical driving force and prior deformation. A new finding is that bainite transformation is inhibited by large stress when the negative effect of prior deformation surpasses the positive effect of mechanical driving force. In addition, the bainite transformation kinetics model established by van Bohemen and Sietsma is modified to describe the bainite transformation under the effect of stress more accurately. Moreover, significant variant selection occurs under the effect of large stress, but the selected bainite variants in adjacent austenite twins are different. Furthermore, the hardness of the steel increases with the stress because of the increase in dislocation density and martensite amount.http://www.sciencedirect.com/science/article/pii/S2238785423012115Carbide-free bainite steelBainite transformation modelStressPrior deformationCrystallography |
| spellingShingle | Mingxing Zhou Junyu Tian Wei Wang Jun Wu Zhengliang Xue Guang Xu Bainite transformation under the effect of large stress in a carbide-free bainite steel Journal of Materials Research and Technology Carbide-free bainite steel Bainite transformation model Stress Prior deformation Crystallography |
| title | Bainite transformation under the effect of large stress in a carbide-free bainite steel |
| title_full | Bainite transformation under the effect of large stress in a carbide-free bainite steel |
| title_fullStr | Bainite transformation under the effect of large stress in a carbide-free bainite steel |
| title_full_unstemmed | Bainite transformation under the effect of large stress in a carbide-free bainite steel |
| title_short | Bainite transformation under the effect of large stress in a carbide-free bainite steel |
| title_sort | bainite transformation under the effect of large stress in a carbide free bainite steel |
| topic | Carbide-free bainite steel Bainite transformation model Stress Prior deformation Crystallography |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423012115 |
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