Achieving ultrafine martensite-bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in GCr15 bearing steel
In this work, a strategy is proposed by combining prior cold deformation with chronological control of phase transformation to achieve ultrafine martensite-bainite duplex microstructures in GCr15 bearing steel, which is the specimens with 0∼45 % prior cold deformation are subjected to first martensi...
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425012499 |
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| author | Xiaohui Lu Guanglin Yuan Xuanhong Yan Rushan Lu Huajie Shi Yinsong Chen Dongsheng Qian Lin Hua |
| author_facet | Xiaohui Lu Guanglin Yuan Xuanhong Yan Rushan Lu Huajie Shi Yinsong Chen Dongsheng Qian Lin Hua |
| author_sort | Xiaohui Lu |
| collection | DOAJ |
| description | In this work, a strategy is proposed by combining prior cold deformation with chronological control of phase transformation to achieve ultrafine martensite-bainite duplex microstructures in GCr15 bearing steel, which is the specimens with 0∼45 % prior cold deformation are subjected to first martensite transformation at below martensite start (Ms) temperature to form different fraction of first transformed martensite due to the decreasing of Ms temperature caused by prior cold deformation and subsequent transfer to isothermal holding at above Ms temperature for bainite transformation. It is found that prior cold deformation can further accelerates bainite transformation by shortening incubation and growth period, and increasing bainite transformation rate. The specimen with 30 % prior cold deformation after heat-treated by austenitizing at 850oC for 30min, first martensite transformation at 200oC for 5min and subsequent bainite transformation at 240oC for 30min, a marginal improvement of strength and significant improvement of impact toughness are achieved, which is increased by 2.8 % and 20.9 % compared to the specimen with 0 prior cold deformation. Meanwhile, ultrafine bainite platelets of ∼220 nm are achieved, which is refined by 35 % compared to the specimen with 0 prior cold deformation. In addition, the effect of prior cold deformation on the evolution of martensite-bainite duplex microstructures is also discussed. |
| format | Article |
| id | doaj-art-99e8045187f84550ae30a13aba055811 |
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| issn | 2238-7854 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
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| series | Journal of Materials Research and Technology |
| spelling | doaj-art-99e8045187f84550ae30a13aba0558112025-08-20T02:00:54ZengElsevierJournal of Materials Research and Technology2238-78542025-05-0136102671028010.1016/j.jmrt.2025.05.094Achieving ultrafine martensite-bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in GCr15 bearing steelXiaohui Lu0Guanglin Yuan1Xuanhong Yan2Rushan Lu3Huajie Shi4Yinsong Chen5Dongsheng Qian6Lin Hua7School of Automotive Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Hubei Engineering Research Center for Green Precision Material Forming, Wuhan University of Technology, Wuhan, Hubei, 430070, ChinaSchool of Automotive Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Hubei Engineering Research Center for Green Precision Material Forming, Wuhan University of Technology, Wuhan, Hubei, 430070, ChinaSchool of Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, ChinaSchool of Automotive Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Hubei Engineering Research Center for Green Precision Material Forming, Wuhan University of Technology, Wuhan, Hubei, 430070, ChinaSchool of Automotive Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, ChinaSchool of Automotive Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, ChinaHubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Hubei Engineering Research Center for Green Precision Material Forming, Wuhan University of Technology, Wuhan, Hubei, 430070, China; School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Corresponding author. Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan, Hubei, 430070, China.School of Automotive Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Hubei Engineering Research Center for Green Precision Material Forming, Wuhan University of Technology, Wuhan, Hubei, 430070, China; Corresponding author. School of Automotive Engineering, Wuhan University of Technology, Wuhan, Hubei, 430070, China.In this work, a strategy is proposed by combining prior cold deformation with chronological control of phase transformation to achieve ultrafine martensite-bainite duplex microstructures in GCr15 bearing steel, which is the specimens with 0∼45 % prior cold deformation are subjected to first martensite transformation at below martensite start (Ms) temperature to form different fraction of first transformed martensite due to the decreasing of Ms temperature caused by prior cold deformation and subsequent transfer to isothermal holding at above Ms temperature for bainite transformation. It is found that prior cold deformation can further accelerates bainite transformation by shortening incubation and growth period, and increasing bainite transformation rate. The specimen with 30 % prior cold deformation after heat-treated by austenitizing at 850oC for 30min, first martensite transformation at 200oC for 5min and subsequent bainite transformation at 240oC for 30min, a marginal improvement of strength and significant improvement of impact toughness are achieved, which is increased by 2.8 % and 20.9 % compared to the specimen with 0 prior cold deformation. Meanwhile, ultrafine bainite platelets of ∼220 nm are achieved, which is refined by 35 % compared to the specimen with 0 prior cold deformation. In addition, the effect of prior cold deformation on the evolution of martensite-bainite duplex microstructures is also discussed.http://www.sciencedirect.com/science/article/pii/S2238785425012499Prior cold deformationMartensite-bainiteBainite transformation kineticsStrength-toughness |
| spellingShingle | Xiaohui Lu Guanglin Yuan Xuanhong Yan Rushan Lu Huajie Shi Yinsong Chen Dongsheng Qian Lin Hua Achieving ultrafine martensite-bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in GCr15 bearing steel Journal of Materials Research and Technology Prior cold deformation Martensite-bainite Bainite transformation kinetics Strength-toughness |
| title | Achieving ultrafine martensite-bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in GCr15 bearing steel |
| title_full | Achieving ultrafine martensite-bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in GCr15 bearing steel |
| title_fullStr | Achieving ultrafine martensite-bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in GCr15 bearing steel |
| title_full_unstemmed | Achieving ultrafine martensite-bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in GCr15 bearing steel |
| title_short | Achieving ultrafine martensite-bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in GCr15 bearing steel |
| title_sort | achieving ultrafine martensite bainite duplex microstructures by combining prior cold deformation with chronological control of phase transformation in gcr15 bearing steel |
| topic | Prior cold deformation Martensite-bainite Bainite transformation kinetics Strength-toughness |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425012499 |
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