Role of refined martensite microstructure and intercritical Mn partitioning on austenite reversion in Fe–5Mn-1.5Al-0.2C alloy
In this paper, we demonstrate a novel design to accelerate the austenite reversion of a Fe–5Mn-1.5Al-0.2C (wt.%) medium Mn steel (MMS), via a deliberating adding an elevated pre-annealing before conventional intercritical annealing. It is indicated that the kinetics of cementite dissolution and aust...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-01-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785424030254 |
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| author | Baojia Hu Hailong Zhu Shichao Liu Chengwu Zheng Liansheng Chen Dianzhong Li |
| author_facet | Baojia Hu Hailong Zhu Shichao Liu Chengwu Zheng Liansheng Chen Dianzhong Li |
| author_sort | Baojia Hu |
| collection | DOAJ |
| description | In this paper, we demonstrate a novel design to accelerate the austenite reversion of a Fe–5Mn-1.5Al-0.2C (wt.%) medium Mn steel (MMS), via a deliberating adding an elevated pre-annealing before conventional intercritical annealing. It is indicated that the kinetics of cementite dissolution and austenite reversion are accelerated simultaneously, and the corresponding heterostructure austenite consisting of a core in low Mn content and a shell in relatively high Mn content is obtained. Meanwhile, the chemical heterogeneity at austenite boundaries significantly improves the thermal stability of reversed austenite during intercritical annealing, as proven by both STEM-EDS measurements and DICTRA simulations. The designed creation of chemical heterogeneity at the austenite boundaries ultimately leads to the appropriate mechanical stability of retained austenite and thus enables sustainable martensite transformation during tensile deformation, enhancing strength and ductility simultaneously. |
| format | Article |
| id | doaj-art-27901541718a4a82b9116ea8acc4f55a |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-27901541718a4a82b9116ea8acc4f55a2025-01-19T06:25:52ZengElsevierJournal of Materials Research and Technology2238-78542025-01-013420602070Role of refined martensite microstructure and intercritical Mn partitioning on austenite reversion in Fe–5Mn-1.5Al-0.2C alloyBaojia Hu0Hailong Zhu1Shichao Liu2Chengwu Zheng3Liansheng Chen4Dianzhong Li5College of Metallurgy and Energy, North China University of Science and Technology, Tangshan, 063210, China; Corresponding author.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan, 063210, ChinaShenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaCollege of Metallurgy and Energy, North China University of Science and Technology, Tangshan, 063210, China; Corresponding author.Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, ChinaIn this paper, we demonstrate a novel design to accelerate the austenite reversion of a Fe–5Mn-1.5Al-0.2C (wt.%) medium Mn steel (MMS), via a deliberating adding an elevated pre-annealing before conventional intercritical annealing. It is indicated that the kinetics of cementite dissolution and austenite reversion are accelerated simultaneously, and the corresponding heterostructure austenite consisting of a core in low Mn content and a shell in relatively high Mn content is obtained. Meanwhile, the chemical heterogeneity at austenite boundaries significantly improves the thermal stability of reversed austenite during intercritical annealing, as proven by both STEM-EDS measurements and DICTRA simulations. The designed creation of chemical heterogeneity at the austenite boundaries ultimately leads to the appropriate mechanical stability of retained austenite and thus enables sustainable martensite transformation during tensile deformation, enhancing strength and ductility simultaneously.http://www.sciencedirect.com/science/article/pii/S2238785424030254Medium Mn steelCementiteIntercritical annealingAustenite reversionTRIP effect |
| spellingShingle | Baojia Hu Hailong Zhu Shichao Liu Chengwu Zheng Liansheng Chen Dianzhong Li Role of refined martensite microstructure and intercritical Mn partitioning on austenite reversion in Fe–5Mn-1.5Al-0.2C alloy Journal of Materials Research and Technology Medium Mn steel Cementite Intercritical annealing Austenite reversion TRIP effect |
| title | Role of refined martensite microstructure and intercritical Mn partitioning on austenite reversion in Fe–5Mn-1.5Al-0.2C alloy |
| title_full | Role of refined martensite microstructure and intercritical Mn partitioning on austenite reversion in Fe–5Mn-1.5Al-0.2C alloy |
| title_fullStr | Role of refined martensite microstructure and intercritical Mn partitioning on austenite reversion in Fe–5Mn-1.5Al-0.2C alloy |
| title_full_unstemmed | Role of refined martensite microstructure and intercritical Mn partitioning on austenite reversion in Fe–5Mn-1.5Al-0.2C alloy |
| title_short | Role of refined martensite microstructure and intercritical Mn partitioning on austenite reversion in Fe–5Mn-1.5Al-0.2C alloy |
| title_sort | role of refined martensite microstructure and intercritical mn partitioning on austenite reversion in fe 5mn 1 5al 0 2c alloy |
| topic | Medium Mn steel Cementite Intercritical annealing Austenite reversion TRIP effect |
| url | http://www.sciencedirect.com/science/article/pii/S2238785424030254 |
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