The Annealing Twins of Fe-20Mn-4Al-0.3C Austenitic Steels during Symmetric and Asymmetric Hot Rolling
The present work investigates the annealing twins of Fe-20Mn-4Al-0.3C austenitic steels in symmetric hot rolling (SHR) and asymmetric hot rolling (ASHR). The average grain size is 26 (±9.6) μm and 11 (±7.0) μm for the tested steel in SHR and ASHR processes. The de...
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| Format: | Article |
| Language: | English |
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MDPI AG
2018-10-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/8/11/882 |
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| author | Changsheng Li Biao Ma Yanlei Song Kun Li Jingbo Dong |
| author_facet | Changsheng Li Biao Ma Yanlei Song Kun Li Jingbo Dong |
| author_sort | Changsheng Li |
| collection | DOAJ |
| description | The present work investigates the annealing twins of Fe-20Mn-4Al-0.3C austenitic steels in symmetric hot rolling (SHR) and asymmetric hot rolling (ASHR). The average grain size is 26 (±9.6) μm and 11 (±7.0) μm for the tested steel in SHR and ASHR processes. The density of high angle grain boundary (HAGB) and annealing twin boundary increase with the decrease of grain size. The annealing twin is obviously higher in ASHR than in SHR. The linear relation model between the logarithm of twin boundary density and the logarithm of the grain size is established. The grain boundary migration is continuously generated during recrystallization in SHR process. The coincident site lattice (CSL) boundary proportion increases with local grain boundary continuing bugling and the migration direction of bugling grain boundary constantly changes. The tensile property of the tested steel is improved due to the effective grain refinement and high density of annealing twins caused by the severe strain in the ASHR process. The purpose of high density HAGB for austenitic steels is helpful to an improvement in mechanical properties. |
| first_indexed | 2024-12-13T07:55:58Z |
| format | Article |
| id | doaj.art-cb3f0ab24667458d9b928315db985f92 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-12-13T07:55:58Z |
| publishDate | 2018-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-cb3f0ab24667458d9b928315db985f922022-12-21T23:54:32ZengMDPI AGMetals2075-47012018-10-0181188210.3390/met8110882met8110882The Annealing Twins of Fe-20Mn-4Al-0.3C Austenitic Steels during Symmetric and Asymmetric Hot RollingChangsheng Li0Biao Ma1Yanlei Song2Kun Li3Jingbo Dong4State Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaCRRC Tangshan Co., Ltd., Tangshan 063035, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaState Key Laboratory of Rolling and Automation, Northeastern University, Shenyang 110819, ChinaThe present work investigates the annealing twins of Fe-20Mn-4Al-0.3C austenitic steels in symmetric hot rolling (SHR) and asymmetric hot rolling (ASHR). The average grain size is 26 (±9.6) μm and 11 (±7.0) μm for the tested steel in SHR and ASHR processes. The density of high angle grain boundary (HAGB) and annealing twin boundary increase with the decrease of grain size. The annealing twin is obviously higher in ASHR than in SHR. The linear relation model between the logarithm of twin boundary density and the logarithm of the grain size is established. The grain boundary migration is continuously generated during recrystallization in SHR process. The coincident site lattice (CSL) boundary proportion increases with local grain boundary continuing bugling and the migration direction of bugling grain boundary constantly changes. The tensile property of the tested steel is improved due to the effective grain refinement and high density of annealing twins caused by the severe strain in the ASHR process. The purpose of high density HAGB for austenitic steels is helpful to an improvement in mechanical properties.https://www.mdpi.com/2075-4701/8/11/882rollingannealingtwin boundaryaustenitic steelgrain refinement |
| spellingShingle | Changsheng Li Biao Ma Yanlei Song Kun Li Jingbo Dong The Annealing Twins of Fe-20Mn-4Al-0.3C Austenitic Steels during Symmetric and Asymmetric Hot Rolling Metals rolling annealing twin boundary austenitic steel grain refinement |
| title | The Annealing Twins of Fe-20Mn-4Al-0.3C Austenitic Steels during Symmetric and Asymmetric Hot Rolling |
| title_full | The Annealing Twins of Fe-20Mn-4Al-0.3C Austenitic Steels during Symmetric and Asymmetric Hot Rolling |
| title_fullStr | The Annealing Twins of Fe-20Mn-4Al-0.3C Austenitic Steels during Symmetric and Asymmetric Hot Rolling |
| title_full_unstemmed | The Annealing Twins of Fe-20Mn-4Al-0.3C Austenitic Steels during Symmetric and Asymmetric Hot Rolling |
| title_short | The Annealing Twins of Fe-20Mn-4Al-0.3C Austenitic Steels during Symmetric and Asymmetric Hot Rolling |
| title_sort | annealing twins of fe 20mn 4al 0 3c austenitic steels during symmetric and asymmetric hot rolling |
| topic | rolling annealing twin boundary austenitic steel grain refinement |
| url | https://www.mdpi.com/2075-4701/8/11/882 |
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