Hot deformation and dynamic recrystallization behaviours of a Nb–Ti bearing HSLA steel simulated by compact strip production process
The hot deformation and dynamic recrystallization (DRX) behaviours of a Nb–Ti bearing HSLA steel simulated by the compact strip production (CSP) process were investigated with the deformation interval of 900–1150 °C/0.01–10 s−1. According to the peak stress, the constitutive equation was constructed...
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Elsevier
2025-05-01
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| Series: | Journal of Materials Research and Technology |
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| author | Zhixiang Fu Gengwei Yang Xinping Mao Ruyang Han Yaowen Xu Deming Xu |
| author_facet | Zhixiang Fu Gengwei Yang Xinping Mao Ruyang Han Yaowen Xu Deming Xu |
| author_sort | Zhixiang Fu |
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| description | The hot deformation and dynamic recrystallization (DRX) behaviours of a Nb–Ti bearing HSLA steel simulated by the compact strip production (CSP) process were investigated with the deformation interval of 900–1150 °C/0.01–10 s−1. According to the peak stress, the constitutive equation was constructed, and the hot deformation activation energy (Qdef) was determined to be 447.153 kJ/mol. Based upon the analysis of the hot processing maps for various true strains, high deformation temperatures or true strain, along with low strain rates are favorable for obtaining a high power dissipation coefficient (η), which promotes the DRX and enhances the hot workability. With the deformation interval changed from 900 °C/0.01–1 s−1 and 950 °C/0.1–1 s−1 to 950 °C/0.01 s−1 and 1000–1150 °C/0.01–10 s−1, the softening mechanism transitioned from discontinuous DRX (DDRX) to continuous DRX (CDRX) + DDRX, the corresponding microstructure transitioned from necklace structure to equiaxed DRX grain. Moreover, the DRX critical strain model and grain size model were constructed based on Z parameter, which has a high degree of validity and accuracy. |
| format | Article |
| id | doaj-art-1c87f2e0feb1438aa9ddab703e8d38dc |
| institution | OA Journals |
| 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-1c87f2e0feb1438aa9ddab703e8d38dc2025-08-20T01:55:31ZengElsevierJournal of Materials Research and Technology2238-78542025-05-01368865887510.1016/j.jmrt.2025.05.134Hot deformation and dynamic recrystallization behaviours of a Nb–Ti bearing HSLA steel simulated by compact strip production processZhixiang Fu0Gengwei Yang1Xinping Mao2Ruyang Han3Yaowen Xu4Deming Xu5The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, China; Corresponding author. The state key laboratory of refractories and metallurgy, Wuhan University of Science and Technology, No. 947, Heping Avenue, Qingshan District, Wuhan, 430081, Hubei, China.Institute for Carbon Neutrality, University of Science and Technology Beijing, Beijing, 100083, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, ChinaThe State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, 430081, Hubei, ChinaThe hot deformation and dynamic recrystallization (DRX) behaviours of a Nb–Ti bearing HSLA steel simulated by the compact strip production (CSP) process were investigated with the deformation interval of 900–1150 °C/0.01–10 s−1. According to the peak stress, the constitutive equation was constructed, and the hot deformation activation energy (Qdef) was determined to be 447.153 kJ/mol. Based upon the analysis of the hot processing maps for various true strains, high deformation temperatures or true strain, along with low strain rates are favorable for obtaining a high power dissipation coefficient (η), which promotes the DRX and enhances the hot workability. With the deformation interval changed from 900 °C/0.01–1 s−1 and 950 °C/0.1–1 s−1 to 950 °C/0.01 s−1 and 1000–1150 °C/0.01–10 s−1, the softening mechanism transitioned from discontinuous DRX (DDRX) to continuous DRX (CDRX) + DDRX, the corresponding microstructure transitioned from necklace structure to equiaxed DRX grain. Moreover, the DRX critical strain model and grain size model were constructed based on Z parameter, which has a high degree of validity and accuracy.http://www.sciencedirect.com/science/article/pii/S223878542501289XHot deformation behaviourDynamic recrystallizationHSLA steelDRX mechanismProcessing map |
| spellingShingle | Zhixiang Fu Gengwei Yang Xinping Mao Ruyang Han Yaowen Xu Deming Xu Hot deformation and dynamic recrystallization behaviours of a Nb–Ti bearing HSLA steel simulated by compact strip production process Journal of Materials Research and Technology Hot deformation behaviour Dynamic recrystallization HSLA steel DRX mechanism Processing map |
| title | Hot deformation and dynamic recrystallization behaviours of a Nb–Ti bearing HSLA steel simulated by compact strip production process |
| title_full | Hot deformation and dynamic recrystallization behaviours of a Nb–Ti bearing HSLA steel simulated by compact strip production process |
| title_fullStr | Hot deformation and dynamic recrystallization behaviours of a Nb–Ti bearing HSLA steel simulated by compact strip production process |
| title_full_unstemmed | Hot deformation and dynamic recrystallization behaviours of a Nb–Ti bearing HSLA steel simulated by compact strip production process |
| title_short | Hot deformation and dynamic recrystallization behaviours of a Nb–Ti bearing HSLA steel simulated by compact strip production process |
| title_sort | hot deformation and dynamic recrystallization behaviours of a nb ti bearing hsla steel simulated by compact strip production process |
| topic | Hot deformation behaviour Dynamic recrystallization HSLA steel DRX mechanism Processing map |
| url | http://www.sciencedirect.com/science/article/pii/S223878542501289X |
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