Effect of compression temperature on deformation of CaO–CaS–Al2O3–MgO inclusions in pipeline steel
Plain strain deformation trials were carried out on samples of pipeline steels at 1473 K, 1673 K and 1723 K, respectively. The deformation of inclusions in the solid steel at different temperatures and in the semi-solid steel was studied. The composition of inclusions changed from 60.62%Al2O3–16.10%...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2021-03-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785421001071 |
| _version_ | 1818574025012543488 |
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| author | Yi Wang Lifeng Zhang Ying Ren Zushu Li Carl Slater Kaiyu Peng Fenggang Liu Yanyu Zhao |
| author_facet | Yi Wang Lifeng Zhang Ying Ren Zushu Li Carl Slater Kaiyu Peng Fenggang Liu Yanyu Zhao |
| author_sort | Yi Wang |
| collection | DOAJ |
| description | Plain strain deformation trials were carried out on samples of pipeline steels at 1473 K, 1673 K and 1723 K, respectively. The deformation of inclusions in the solid steel at different temperatures and in the semi-solid steel was studied. The composition of inclusions changed from 60.62%Al2O3–16.10%CaO–10.27%MgO–13.01%CaS before deformation to 60.59%Al2O3–13.03%CaO–12.74%MgO–13.63%CaS, 59.69%Al2O3–7.04%CaO–11.51%MgO–21.76%CaS, and 68.26%Al2O3–22.56%CaO–6.68%MgO–2.5%CaS with corresponding deforming temperatures of 1473 K, 1673 K and 1723 K. While the average aspect ratio of inclusions increased from 1.28 to 2.23, 1.32, and 1.35, respectively. Thermodynamic calculations performed by FactSage 7.0 verified the composition transformation from CaO to CaS during the solidification and cooling process of the steel. A kinetic model was used to calculate the dynamic transformation of the inclusion composition at compression temperatures. The inclusion transformation ratio from CaO to CaS increased from 38.28% at 1473 K to 50.50% at 1673 K. For the deformation in the solid steel at the temperature below 1673 K, the thickness of the hard phase CaS increased with the soaking temperature, while the hardness of the steel matrix decreased. The larger hardness difference between inclusions and the steel matrix led to a higher aspect ratio of inclusions after deformation. For the deformation in the semi-solid steel, the small difference of hardness between the soft inclusion phase and the soft steel matrix resulted in a low aspect ratio of inclusions in the semi-solid steel after deformation. |
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| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-12-15T00:20:55Z |
| publishDate | 2021-03-01 |
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| series | Journal of Materials Research and Technology |
| spelling | doaj.art-345c7eec7f794ee3b45d74bdebec9de52022-12-21T22:42:18ZengElsevierJournal of Materials Research and Technology2238-78542021-03-011112201231Effect of compression temperature on deformation of CaO–CaS–Al2O3–MgO inclusions in pipeline steelYi Wang0Lifeng Zhang1Ying Ren2Zushu Li3Carl Slater4Kaiyu Peng5Fenggang Liu6Yanyu Zhao7School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing (USTB), Beijing, 100083, ChinaState Key Laboratory of Metastable Materials Science and Technology, School of Mechanical Engineering, Yanshan University, Qinhuangdao City, Hebei Province, 066004, China; Corresponding author.School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing (USTB), Beijing, 100083, China; Corresponding author.Advanced Steel Research Centre, WMG, University of Warwick, Coventry, CV4 7AL, UK; Corresponding author.Advanced Steel Research Centre, WMG, University of Warwick, Coventry, CV4 7AL, UKSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing (USTB), Beijing, 100083, ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing (USTB), Beijing, 100083, ChinaSchool of Metallurgical and Ecological Engineering, University of Science and Technology Beijing (USTB), Beijing, 100083, ChinaPlain strain deformation trials were carried out on samples of pipeline steels at 1473 K, 1673 K and 1723 K, respectively. The deformation of inclusions in the solid steel at different temperatures and in the semi-solid steel was studied. The composition of inclusions changed from 60.62%Al2O3–16.10%CaO–10.27%MgO–13.01%CaS before deformation to 60.59%Al2O3–13.03%CaO–12.74%MgO–13.63%CaS, 59.69%Al2O3–7.04%CaO–11.51%MgO–21.76%CaS, and 68.26%Al2O3–22.56%CaO–6.68%MgO–2.5%CaS with corresponding deforming temperatures of 1473 K, 1673 K and 1723 K. While the average aspect ratio of inclusions increased from 1.28 to 2.23, 1.32, and 1.35, respectively. Thermodynamic calculations performed by FactSage 7.0 verified the composition transformation from CaO to CaS during the solidification and cooling process of the steel. A kinetic model was used to calculate the dynamic transformation of the inclusion composition at compression temperatures. The inclusion transformation ratio from CaO to CaS increased from 38.28% at 1473 K to 50.50% at 1673 K. For the deformation in the solid steel at the temperature below 1673 K, the thickness of the hard phase CaS increased with the soaking temperature, while the hardness of the steel matrix decreased. The larger hardness difference between inclusions and the steel matrix led to a higher aspect ratio of inclusions after deformation. For the deformation in the semi-solid steel, the small difference of hardness between the soft inclusion phase and the soft steel matrix resulted in a low aspect ratio of inclusions in the semi-solid steel after deformation.http://www.sciencedirect.com/science/article/pii/S2238785421001071Inclusion deformationInclusion transformationSemi-solid rollingPipeline steelThermodynamicsKinetics |
| spellingShingle | Yi Wang Lifeng Zhang Ying Ren Zushu Li Carl Slater Kaiyu Peng Fenggang Liu Yanyu Zhao Effect of compression temperature on deformation of CaO–CaS–Al2O3–MgO inclusions in pipeline steel Journal of Materials Research and Technology Inclusion deformation Inclusion transformation Semi-solid rolling Pipeline steel Thermodynamics Kinetics |
| title | Effect of compression temperature on deformation of CaO–CaS–Al2O3–MgO inclusions in pipeline steel |
| title_full | Effect of compression temperature on deformation of CaO–CaS–Al2O3–MgO inclusions in pipeline steel |
| title_fullStr | Effect of compression temperature on deformation of CaO–CaS–Al2O3–MgO inclusions in pipeline steel |
| title_full_unstemmed | Effect of compression temperature on deformation of CaO–CaS–Al2O3–MgO inclusions in pipeline steel |
| title_short | Effect of compression temperature on deformation of CaO–CaS–Al2O3–MgO inclusions in pipeline steel |
| title_sort | effect of compression temperature on deformation of cao cas al2o3 mgo inclusions in pipeline steel |
| topic | Inclusion deformation Inclusion transformation Semi-solid rolling Pipeline steel Thermodynamics Kinetics |
| url | http://www.sciencedirect.com/science/article/pii/S2238785421001071 |
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