Influences of Strain on the Microstructure and Mechanical Properties of High-Carbon Steel
The effects of strain on the microstructure and mechanical properties of 0.81C-0.22Si-0.31Mn (wt%) high-carbon steel were investigated by thermal simulation, scanning electron microscopy, high-resolution transmission electron microscopy (HRTEM), and an electron backscatter diffractometer (EBSD). It...
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MDPI AG
2022-09-01
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| Series: | Metals |
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| author | Zhen Cai Xiaolong Gan Yanqi Li Sheng Liu Siqian Bao Guang Xu |
| author_facet | Zhen Cai Xiaolong Gan Yanqi Li Sheng Liu Siqian Bao Guang Xu |
| author_sort | Zhen Cai |
| collection | DOAJ |
| description | The effects of strain on the microstructure and mechanical properties of 0.81C-0.22Si-0.31Mn (wt%) high-carbon steel were investigated by thermal simulation, scanning electron microscopy, high-resolution transmission electron microscopy (HRTEM), and an electron backscatter diffractometer (EBSD). It was found that when the steel was deformed at 670 °C (a temperature between A<sub>1</sub> and A<sub>r1</sub>), a deformation-induced pearlite transformation and cementite spheroidization occurred. The volume fraction of pearlite and the spheroidization ratio of cementite increased with a strain increase from 20% to 75%. The microstructure mainly consisted of pearlite when the deformation strain exceeded 40%. The aspect ratio was at its maximum (5.3) at 40% strain and decreased to 1.4 at 75% strain. In addition, the strength of the steel decreased and the elongation increased rapidly with the increase in strain from 20% to 60% due to the spheroidization of cementite. However, as the strain further increased to 75%, the strength increased slightly due to the refinement of the ferrite matrix. The comprehensive performance of the investigated steel can be improved by applying a strain between A<sub>1</sub> and A<sub>r1</sub>. |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T23:09:27Z |
| publishDate | 2022-09-01 |
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| spelling | doaj.art-0ad7f8a11a804c96ab0eef6c6f7748c52023-11-23T17:47:24ZengMDPI AGMetals2075-47012022-09-01129151810.3390/met12091518Influences of Strain on the Microstructure and Mechanical Properties of High-Carbon SteelZhen Cai0Xiaolong Gan1Yanqi Li2Sheng Liu3Siqian Bao4Guang Xu5The State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe State Key Laboratory of Refractories and Metallurgy, Hubei Collaborative Innovation Center for Advanced Steels, Wuhan University of Science and Technology, Wuhan 430081, ChinaThe effects of strain on the microstructure and mechanical properties of 0.81C-0.22Si-0.31Mn (wt%) high-carbon steel were investigated by thermal simulation, scanning electron microscopy, high-resolution transmission electron microscopy (HRTEM), and an electron backscatter diffractometer (EBSD). It was found that when the steel was deformed at 670 °C (a temperature between A<sub>1</sub> and A<sub>r1</sub>), a deformation-induced pearlite transformation and cementite spheroidization occurred. The volume fraction of pearlite and the spheroidization ratio of cementite increased with a strain increase from 20% to 75%. The microstructure mainly consisted of pearlite when the deformation strain exceeded 40%. The aspect ratio was at its maximum (5.3) at 40% strain and decreased to 1.4 at 75% strain. In addition, the strength of the steel decreased and the elongation increased rapidly with the increase in strain from 20% to 60% due to the spheroidization of cementite. However, as the strain further increased to 75%, the strength increased slightly due to the refinement of the ferrite matrix. The comprehensive performance of the investigated steel can be improved by applying a strain between A<sub>1</sub> and A<sub>r1</sub>.https://www.mdpi.com/2075-4701/12/9/1518high-carbon steelstrainmicrostructuredeformation-induced pearlite transformationcementite spheroidization |
| spellingShingle | Zhen Cai Xiaolong Gan Yanqi Li Sheng Liu Siqian Bao Guang Xu Influences of Strain on the Microstructure and Mechanical Properties of High-Carbon Steel Metals high-carbon steel strain microstructure deformation-induced pearlite transformation cementite spheroidization |
| title | Influences of Strain on the Microstructure and Mechanical Properties of High-Carbon Steel |
| title_full | Influences of Strain on the Microstructure and Mechanical Properties of High-Carbon Steel |
| title_fullStr | Influences of Strain on the Microstructure and Mechanical Properties of High-Carbon Steel |
| title_full_unstemmed | Influences of Strain on the Microstructure and Mechanical Properties of High-Carbon Steel |
| title_short | Influences of Strain on the Microstructure and Mechanical Properties of High-Carbon Steel |
| title_sort | influences of strain on the microstructure and mechanical properties of high carbon steel |
| topic | high-carbon steel strain microstructure deformation-induced pearlite transformation cementite spheroidization |
| url | https://www.mdpi.com/2075-4701/12/9/1518 |
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