Effect of V Addition on Microstructure and Mechanical Properties in C–Mn–Si Steels after Quenching and Partitioning Processes
Three C-Si-Mn Q&P steels with different V addition after one-step and two-step quenching and partitioning (Q&P) processes were investigated by means of optical microstructure observation, X-ray diffraction (XRD) measurement, transmission electron microscopy (TEM) characterization and particl...
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MDPI AG
2021-08-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/11/8/1306 |
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| author | Gong-Ting Zhang Na-Qiong Zhu Bo-Wei Sun Zheng-Zhi Zhao Zhi-Wang Zheng Di Tang Lin Li |
| author_facet | Gong-Ting Zhang Na-Qiong Zhu Bo-Wei Sun Zheng-Zhi Zhao Zhi-Wang Zheng Di Tang Lin Li |
| author_sort | Gong-Ting Zhang |
| collection | DOAJ |
| description | Three C-Si-Mn Q&P steels with different V addition after one-step and two-step quenching and partitioning (Q&P) processes were investigated by means of optical microstructure observation, X-ray diffraction (XRD) measurement, transmission electron microscopy (TEM) characterization and particle size distribution (PSD) analysis. The effect of V addition on strength and ductility of the steels was elucidated by comparative analysis on the microstructure and mechanical properties as functions of partitioning time and temperature. For one-step Q&P treatment, the mechanical properties were mainly controlled by the tempering behavior of martensite during partitioning. V addition was helpful to mitigate the deterioration of mechanical properties by precipitation strengthening and grain refinement strengthening. For two-step Q&P treatment, the satisfying plasticity was attributed to the transformation-induced plasticity (TRIP) effect of retained austenite maintaining the high work hardening rate at high strain regime. The higher volume fraction of retained austenite with high stability resulted from the refined microstructure and the promoted carbon partitioning for the steel with 0.16 wt% V addition. However, the carbon consumption due to the formation of VC carbides led to the strength reduction of tempered martensite. |
| first_indexed | 2024-03-10T08:35:25Z |
| format | Article |
| id | doaj.art-b0d746d2bfc7406b85d02f3cd764b684 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T08:35:25Z |
| publishDate | 2021-08-01 |
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| record_format | Article |
| series | Metals |
| spelling | doaj.art-b0d746d2bfc7406b85d02f3cd764b6842023-11-22T08:42:38ZengMDPI AGMetals2075-47012021-08-01118130610.3390/met11081306Effect of V Addition on Microstructure and Mechanical Properties in C–Mn–Si Steels after Quenching and Partitioning ProcessesGong-Ting Zhang0Na-Qiong Zhu1Bo-Wei Sun2Zheng-Zhi Zhao3Zhi-Wang Zheng4Di Tang5Lin Li6Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaCollege of International Vocational Education, Shanghai Polytechnic University, Shanghai 201209, ChinaSchool of Material Science and Engineering, Shanghai University, Shanghai 200444, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaState Key Laboratory of Vanadium and Titanium Resources Comprehensive Utilization, Pangang Group Research Institute Co., Ltd., Panzhihua 617000, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Material Science and Engineering, Shanghai University, Shanghai 200444, ChinaThree C-Si-Mn Q&P steels with different V addition after one-step and two-step quenching and partitioning (Q&P) processes were investigated by means of optical microstructure observation, X-ray diffraction (XRD) measurement, transmission electron microscopy (TEM) characterization and particle size distribution (PSD) analysis. The effect of V addition on strength and ductility of the steels was elucidated by comparative analysis on the microstructure and mechanical properties as functions of partitioning time and temperature. For one-step Q&P treatment, the mechanical properties were mainly controlled by the tempering behavior of martensite during partitioning. V addition was helpful to mitigate the deterioration of mechanical properties by precipitation strengthening and grain refinement strengthening. For two-step Q&P treatment, the satisfying plasticity was attributed to the transformation-induced plasticity (TRIP) effect of retained austenite maintaining the high work hardening rate at high strain regime. The higher volume fraction of retained austenite with high stability resulted from the refined microstructure and the promoted carbon partitioning for the steel with 0.16 wt% V addition. However, the carbon consumption due to the formation of VC carbides led to the strength reduction of tempered martensite.https://www.mdpi.com/2075-4701/11/8/1306V microalloyed Q&P steelmicrostructuremechanical propertiesprecipitate size distributionwork hardening rate |
| spellingShingle | Gong-Ting Zhang Na-Qiong Zhu Bo-Wei Sun Zheng-Zhi Zhao Zhi-Wang Zheng Di Tang Lin Li Effect of V Addition on Microstructure and Mechanical Properties in C–Mn–Si Steels after Quenching and Partitioning Processes Metals V microalloyed Q&P steel microstructure mechanical properties precipitate size distribution work hardening rate |
| title | Effect of V Addition on Microstructure and Mechanical Properties in C–Mn–Si Steels after Quenching and Partitioning Processes |
| title_full | Effect of V Addition on Microstructure and Mechanical Properties in C–Mn–Si Steels after Quenching and Partitioning Processes |
| title_fullStr | Effect of V Addition on Microstructure and Mechanical Properties in C–Mn–Si Steels after Quenching and Partitioning Processes |
| title_full_unstemmed | Effect of V Addition on Microstructure and Mechanical Properties in C–Mn–Si Steels after Quenching and Partitioning Processes |
| title_short | Effect of V Addition on Microstructure and Mechanical Properties in C–Mn–Si Steels after Quenching and Partitioning Processes |
| title_sort | effect of v addition on microstructure and mechanical properties in c mn si steels after quenching and partitioning processes |
| topic | V microalloyed Q&P steel microstructure mechanical properties precipitate size distribution work hardening rate |
| url | https://www.mdpi.com/2075-4701/11/8/1306 |
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