Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel
Conventional quenching and tempering were employed to achieve the optimal strength and toughness of low-carbon low-alloy steel. The fracture behavior (crack initiation and propagation) of the steel in the impact process was also analyzed. It was found that the microstructures of the steel after diff...
| Autores principales: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | English |
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MDPI AG
2022-06-01
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| Colección: | Metals |
| Materias: | |
| Acceso en línea: | https://www.mdpi.com/2075-4701/12/7/1087 |
| _version_ | 1827627938836643840 |
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| author | Yajing Zhang Jianhua Yang Daheng Xiao Deng Luo Chende Tuo Huibin Wu |
| author_facet | Yajing Zhang Jianhua Yang Daheng Xiao Deng Luo Chende Tuo Huibin Wu |
| author_sort | Yajing Zhang |
| collection | DOAJ |
| description | Conventional quenching and tempering were employed to achieve the optimal strength and toughness of low-carbon low-alloy steel. The fracture behavior (crack initiation and propagation) of the steel in the impact process was also analyzed. It was found that the microstructures of the steel after different tempering treatments were mainly composed of martensite, and its mechanical properties were dependent on the tempering temperature. With the increase in tempering temperature, martensitic laths merged and coarsened. Moreover, recovery occurred, causing a decrease in dislocation density. Subsequently, the strength of the steel gradually decreased, and the impact energy increased. When the tempering temperature was 600 °C, the optimal yield strength (557 MPa) and the impact energy (331 J) were achieved. In addition, high angle grain boundaries (HAGBs) affected the impact energy and crack propagation. Cracks were easily deflected when they encountered high angle grain boundaries, and linearly expanded when they encountered low angle grain boundaries (LAGBs). |
| first_indexed | 2024-03-09T13:23:50Z |
| format | Article |
| id | doaj.art-e533c0e5d0f54684a5f41f0fe8491815 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-09T13:23:50Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-e533c0e5d0f54684a5f41f0fe84918152023-11-30T21:27:04ZengMDPI AGMetals2075-47012022-06-01127108710.3390/met12071087Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy SteelYajing Zhang0Jianhua Yang1Daheng Xiao2Deng Luo3Chende Tuo4Huibin Wu5Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaTechnical Quality Department, Xiangtan Iron & Steel Group Co., Ltd., Xiangtan 411101, ChinaTechnical Quality Department, Xiangtan Iron & Steel Group Co., Ltd., Xiangtan 411101, ChinaTechnical Quality Department, Xiangtan Iron & Steel Group Co., Ltd., Xiangtan 411101, ChinaTechnical Quality Department, Xiangtan Iron & Steel Group Co., Ltd., Xiangtan 411101, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaConventional quenching and tempering were employed to achieve the optimal strength and toughness of low-carbon low-alloy steel. The fracture behavior (crack initiation and propagation) of the steel in the impact process was also analyzed. It was found that the microstructures of the steel after different tempering treatments were mainly composed of martensite, and its mechanical properties were dependent on the tempering temperature. With the increase in tempering temperature, martensitic laths merged and coarsened. Moreover, recovery occurred, causing a decrease in dislocation density. Subsequently, the strength of the steel gradually decreased, and the impact energy increased. When the tempering temperature was 600 °C, the optimal yield strength (557 MPa) and the impact energy (331 J) were achieved. In addition, high angle grain boundaries (HAGBs) affected the impact energy and crack propagation. Cracks were easily deflected when they encountered high angle grain boundaries, and linearly expanded when they encountered low angle grain boundaries (LAGBs).https://www.mdpi.com/2075-4701/12/7/1087low-carbon low-alloy steelmartensitestrength and toughness matchingquenching and temperingcrack propagation |
| spellingShingle | Yajing Zhang Jianhua Yang Daheng Xiao Deng Luo Chende Tuo Huibin Wu Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel Metals low-carbon low-alloy steel martensite strength and toughness matching quenching and tempering crack propagation |
| title | Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel |
| title_full | Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel |
| title_fullStr | Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel |
| title_full_unstemmed | Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel |
| title_short | Effect of Quenching and Tempering on Mechanical Properties and Impact Fracture Behavior of Low-Carbon Low-Alloy Steel |
| title_sort | effect of quenching and tempering on mechanical properties and impact fracture behavior of low carbon low alloy steel |
| topic | low-carbon low-alloy steel martensite strength and toughness matching quenching and tempering crack propagation |
| url | https://www.mdpi.com/2075-4701/12/7/1087 |
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