Hot Workability of 300M Steel Investigated by In Situ and Ex Situ Compression Tests
In this work, hot compression experiments of 300M steel were performed at 900−1150 °C and 0.01−10 s<sup>−1</sup>. The relation of flow stress and microstructure evolution was analyzed. The intriguing finding was that at a lower strain rate (0.01 s&l...
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MDPI AG
2019-08-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/9/8/880 |
| _version_ | 1818614652913844224 |
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| author | Rongchuang Chen Haifeng Xiao Min Wang Jianjun Li |
| author_facet | Rongchuang Chen Haifeng Xiao Min Wang Jianjun Li |
| author_sort | Rongchuang Chen |
| collection | DOAJ |
| description | In this work, hot compression experiments of 300M steel were performed at 900−1150 °C and 0.01−10 s<sup>−1</sup>. The relation of flow stress and microstructure evolution was analyzed. The intriguing finding was that at a lower strain rate (0.01 s<sup>−1</sup>), the flow stress curves were single-peaked, while at a higher strain rate (10 s<sup>−1</sup>), no peak occurred. Metallographic observation results revealed the phenomenon was because dynamic recrystallization was more complete at a lower strain rate. In situ compression tests were carried out to compare with the results by ex situ compression tests. Hot working maps representing the influences of strains, strain rates, and temperatures were established. It was found that the power dissipation coefficient was not only related to the recrystallized grain size but was also related to the volume fraction of recrystallized grains. The optimal hot working parameters were suggested. This work provides comprehensive understanding of the hot workability of 300M steel in thermal compression. |
| first_indexed | 2024-12-16T16:21:25Z |
| format | Article |
| id | doaj.art-706ead8e12c644878c840d5124289307 |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-16T16:21:25Z |
| publishDate | 2019-08-01 |
| publisher | MDPI AG |
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| series | Metals |
| spelling | doaj.art-706ead8e12c644878c840d51242893072022-12-21T22:24:54ZengMDPI AGMetals2075-47012019-08-019888010.3390/met9080880met9080880Hot Workability of 300M Steel Investigated by In Situ and Ex Situ Compression TestsRongchuang Chen0Haifeng Xiao1Min Wang2Jianjun Li3School of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, ChinaSchool of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, ChinaSchool of Materials Science and Engineering, Hubei University of Automotive Technology, Shiyan 442002, ChinaSchool of Materials Science and Engineering, State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, ChinaIn this work, hot compression experiments of 300M steel were performed at 900−1150 °C and 0.01−10 s<sup>−1</sup>. The relation of flow stress and microstructure evolution was analyzed. The intriguing finding was that at a lower strain rate (0.01 s<sup>−1</sup>), the flow stress curves were single-peaked, while at a higher strain rate (10 s<sup>−1</sup>), no peak occurred. Metallographic observation results revealed the phenomenon was because dynamic recrystallization was more complete at a lower strain rate. In situ compression tests were carried out to compare with the results by ex situ compression tests. Hot working maps representing the influences of strains, strain rates, and temperatures were established. It was found that the power dissipation coefficient was not only related to the recrystallized grain size but was also related to the volume fraction of recrystallized grains. The optimal hot working parameters were suggested. This work provides comprehensive understanding of the hot workability of 300M steel in thermal compression.https://www.mdpi.com/2075-4701/9/8/880300M steelhot processing mapthermal compressionmicrostructure evolutionin situ experiments |
| spellingShingle | Rongchuang Chen Haifeng Xiao Min Wang Jianjun Li Hot Workability of 300M Steel Investigated by In Situ and Ex Situ Compression Tests Metals 300M steel hot processing map thermal compression microstructure evolution in situ experiments |
| title | Hot Workability of 300M Steel Investigated by In Situ and Ex Situ Compression Tests |
| title_full | Hot Workability of 300M Steel Investigated by In Situ and Ex Situ Compression Tests |
| title_fullStr | Hot Workability of 300M Steel Investigated by In Situ and Ex Situ Compression Tests |
| title_full_unstemmed | Hot Workability of 300M Steel Investigated by In Situ and Ex Situ Compression Tests |
| title_short | Hot Workability of 300M Steel Investigated by In Situ and Ex Situ Compression Tests |
| title_sort | hot workability of 300m steel investigated by in situ and ex situ compression tests |
| topic | 300M steel hot processing map thermal compression microstructure evolution in situ experiments |
| url | https://www.mdpi.com/2075-4701/9/8/880 |
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