Study on the Coarsening Behavior of Interphase Precipitates and Random Precipitates in Steel Under the High-Temperature Environment of Fire
In the domain of fire-resistant steels, the characteristics of precipitates significantly influence material properties. This study developed a novel heat treatment protocol to concurrently achieve both interphase precipitation and random precipitation. Samples were subjected to isothermal treatment...
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| Format: | Article |
| Language: | English |
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MDPI AG
2025-01-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/15/1/73 |
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| author | Jinghua Cong Yongzhe Yang Haibin Zhu Xueliang Shang Hongyu Wu Zhendong Song Xuemin Wang Xiangyu Xu |
| author_facet | Jinghua Cong Yongzhe Yang Haibin Zhu Xueliang Shang Hongyu Wu Zhendong Song Xuemin Wang Xiangyu Xu |
| author_sort | Jinghua Cong |
| collection | DOAJ |
| description | In the domain of fire-resistant steels, the characteristics of precipitates significantly influence material properties. This study developed a novel heat treatment protocol to concurrently achieve both interphase precipitation and random precipitation. Samples were subjected to isothermal treatments at various temperatures and durations, while techniques such as scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to thoroughly analyze the coarsening behavior of the two types of precipitate and reveal their thermal stability differences. The results show that the growth and coarsening rates of interphase precipitates are substantially lower than random precipitates. Coarsening kinetics analysis reveals that the radius of random precipitates follows a 1/3 power law with time at 600 °C and 650 °C, whereas the radius of interphase precipitates adheres to a 1/6 power law at 600 °C and a 1/5 power law at 650 °C. Furthermore, interphase precipitation demonstrates excellent size uniformity, which hinders the formation of a concentration gradient, thereby reducing the coarsening rate and enhancing thermal stability. After prolonged tempering treatment, interphase precipitation maintains a higher strengthening contribution than random precipitation. This study provides novel insights and theoretical foundations for the design and development of fire-resistant steels. |
| format | Article |
| id | doaj-art-6419ad58f0044c2e8bbf43a8fb346d05 |
| institution | Kabale University |
| issn | 2075-4701 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj-art-6419ad58f0044c2e8bbf43a8fb346d052025-01-24T13:41:35ZengMDPI AGMetals2075-47012025-01-011517310.3390/met15010073Study on the Coarsening Behavior of Interphase Precipitates and Random Precipitates in Steel Under the High-Temperature Environment of FireJinghua Cong0Yongzhe Yang1Haibin Zhu2Xueliang Shang3Hongyu Wu4Zhendong Song5Xuemin Wang6Xiangyu Xu7Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaTechnical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing, Beijing 100083, ChinaCenter for Advanced Solidification Technology, School of Materials Science and Engineering, Shanghai University, Shanghai 200444, ChinaIn the domain of fire-resistant steels, the characteristics of precipitates significantly influence material properties. This study developed a novel heat treatment protocol to concurrently achieve both interphase precipitation and random precipitation. Samples were subjected to isothermal treatments at various temperatures and durations, while techniques such as scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were employed to thoroughly analyze the coarsening behavior of the two types of precipitate and reveal their thermal stability differences. The results show that the growth and coarsening rates of interphase precipitates are substantially lower than random precipitates. Coarsening kinetics analysis reveals that the radius of random precipitates follows a 1/3 power law with time at 600 °C and 650 °C, whereas the radius of interphase precipitates adheres to a 1/6 power law at 600 °C and a 1/5 power law at 650 °C. Furthermore, interphase precipitation demonstrates excellent size uniformity, which hinders the formation of a concentration gradient, thereby reducing the coarsening rate and enhancing thermal stability. After prolonged tempering treatment, interphase precipitation maintains a higher strengthening contribution than random precipitation. This study provides novel insights and theoretical foundations for the design and development of fire-resistant steels.https://www.mdpi.com/2075-4701/15/1/73interphase precipitationrandom precipitationthermal stabilitycoarsening behavior |
| spellingShingle | Jinghua Cong Yongzhe Yang Haibin Zhu Xueliang Shang Hongyu Wu Zhendong Song Xuemin Wang Xiangyu Xu Study on the Coarsening Behavior of Interphase Precipitates and Random Precipitates in Steel Under the High-Temperature Environment of Fire Metals interphase precipitation random precipitation thermal stability coarsening behavior |
| title | Study on the Coarsening Behavior of Interphase Precipitates and Random Precipitates in Steel Under the High-Temperature Environment of Fire |
| title_full | Study on the Coarsening Behavior of Interphase Precipitates and Random Precipitates in Steel Under the High-Temperature Environment of Fire |
| title_fullStr | Study on the Coarsening Behavior of Interphase Precipitates and Random Precipitates in Steel Under the High-Temperature Environment of Fire |
| title_full_unstemmed | Study on the Coarsening Behavior of Interphase Precipitates and Random Precipitates in Steel Under the High-Temperature Environment of Fire |
| title_short | Study on the Coarsening Behavior of Interphase Precipitates and Random Precipitates in Steel Under the High-Temperature Environment of Fire |
| title_sort | study on the coarsening behavior of interphase precipitates and random precipitates in steel under the high temperature environment of fire |
| topic | interphase precipitation random precipitation thermal stability coarsening behavior |
| url | https://www.mdpi.com/2075-4701/15/1/73 |
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