Research on the Phase Transformation of a Newly Developed Carbonitride-Strengthened Martensitic Heat Resistant Steel
The phase transformation behavior of nitrides-strengthened martensitic (NSM) heat resistant steel, showing excellent creep behavior under 500°C, was studied in this article. The results showed that during the heating procedure, the formation of austenite was composed successively by intermetallic co...
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| Format: | Article |
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Frontiers Media S.A.
2022-10-01
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| Series: | Frontiers in Materials |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fmats.2022.803596/full |
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| author | Wenfeng Zhang Wenfeng Zhang Wenfeng Zhang Ping Pan Jun Zhou Wei Xiong Yunqiang Liu Xiaogang Liu Xiaogang Liu Wei Yan |
| author_facet | Wenfeng Zhang Wenfeng Zhang Wenfeng Zhang Ping Pan Jun Zhou Wei Xiong Yunqiang Liu Xiaogang Liu Xiaogang Liu Wei Yan |
| author_sort | Wenfeng Zhang |
| collection | DOAJ |
| description | The phase transformation behavior of nitrides-strengthened martensitic (NSM) heat resistant steel, showing excellent creep behavior under 500°C, was studied in this article. The results showed that during the heating procedure, the formation of austenite was composed successively by intermetallic compound formation in martensite, crystal structure shift from body-centered cubic (BCC) to face-centered cubic (FCC), martensite/ferrite grain boundary migration, austenite nucleation, and growing. The crystal structure switch from BCC to FCC was sensitive to temperature, while the switch from FCC to BCC was only done with phase transformations. During the continuous cooling procedure, the carbide-free bainite would form if the cooling rate was beneath the critical cooling rate. The critical cooling rate was defined as 0.5°C/s for single martensite in NSM steel, according to its inconsistent results of microstructure and continuous cooling transformation (CCT) expansion curve under this condition. Two phase transformation zones were detected in NSM steel: one was a nose-shaped bainite zone and the other was a stripe-shaped martensite zone. |
| first_indexed | 2024-04-11T08:42:02Z |
| format | Article |
| id | doaj.art-7046fc7f147040bca7de90f740a9f95d |
| institution | Directory Open Access Journal |
| issn | 2296-8016 |
| language | English |
| last_indexed | 2024-04-11T08:42:02Z |
| publishDate | 2022-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Materials |
| spelling | doaj.art-7046fc7f147040bca7de90f740a9f95d2022-12-22T04:34:09ZengFrontiers Media S.A.Frontiers in Materials2296-80162022-10-01910.3389/fmats.2022.803596803596Research on the Phase Transformation of a Newly Developed Carbonitride-Strengthened Martensitic Heat Resistant SteelWenfeng Zhang0Wenfeng Zhang1Wenfeng Zhang2Ping Pan3Jun Zhou4Wei Xiong5Yunqiang Liu6Xiaogang Liu7Xiaogang Liu8Wei Yan9Guangdong Polytechnic of Water Resources and Electric Engineering, Guangzhou, ChinaSchool of Mechanical Engineering, Gulin University of Aerospace Technology, Guilin, ChinaGuangxi Colleges and Universities Key Laboratory of Robot & Welding, Guilin University of Aerospace Technology, Guilin, ChinaSchool of Mechanical Engineering, Gulin University of Aerospace Technology, Guilin, ChinaSchool of Mechanical Engineering, Gulin University of Aerospace Technology, Guilin, ChinaSchool of Mechanical Engineering, Gulin University of Aerospace Technology, Guilin, ChinaSchool of Mechanical Engineering, Gulin University of Aerospace Technology, Guilin, ChinaSchool of Mechanical Engineering, Gulin University of Aerospace Technology, Guilin, ChinaGuangxi Colleges and Universities Key Laboratory of Robot & Welding, Guilin University of Aerospace Technology, Guilin, ChinaInstitute of Metal Research, Chinese Academy of Sciences, Shenyang, ChinaThe phase transformation behavior of nitrides-strengthened martensitic (NSM) heat resistant steel, showing excellent creep behavior under 500°C, was studied in this article. The results showed that during the heating procedure, the formation of austenite was composed successively by intermetallic compound formation in martensite, crystal structure shift from body-centered cubic (BCC) to face-centered cubic (FCC), martensite/ferrite grain boundary migration, austenite nucleation, and growing. The crystal structure switch from BCC to FCC was sensitive to temperature, while the switch from FCC to BCC was only done with phase transformations. During the continuous cooling procedure, the carbide-free bainite would form if the cooling rate was beneath the critical cooling rate. The critical cooling rate was defined as 0.5°C/s for single martensite in NSM steel, according to its inconsistent results of microstructure and continuous cooling transformation (CCT) expansion curve under this condition. Two phase transformation zones were detected in NSM steel: one was a nose-shaped bainite zone and the other was a stripe-shaped martensite zone.https://www.frontiersin.org/articles/10.3389/fmats.2022.803596/fullphase transformationcarbon-free bainiteCCT diagrammartensitic heat resistant steelnitrides strengthened |
| spellingShingle | Wenfeng Zhang Wenfeng Zhang Wenfeng Zhang Ping Pan Jun Zhou Wei Xiong Yunqiang Liu Xiaogang Liu Xiaogang Liu Wei Yan Research on the Phase Transformation of a Newly Developed Carbonitride-Strengthened Martensitic Heat Resistant Steel Frontiers in Materials phase transformation carbon-free bainite CCT diagram martensitic heat resistant steel nitrides strengthened |
| title | Research on the Phase Transformation of a Newly Developed Carbonitride-Strengthened Martensitic Heat Resistant Steel |
| title_full | Research on the Phase Transformation of a Newly Developed Carbonitride-Strengthened Martensitic Heat Resistant Steel |
| title_fullStr | Research on the Phase Transformation of a Newly Developed Carbonitride-Strengthened Martensitic Heat Resistant Steel |
| title_full_unstemmed | Research on the Phase Transformation of a Newly Developed Carbonitride-Strengthened Martensitic Heat Resistant Steel |
| title_short | Research on the Phase Transformation of a Newly Developed Carbonitride-Strengthened Martensitic Heat Resistant Steel |
| title_sort | research on the phase transformation of a newly developed carbonitride strengthened martensitic heat resistant steel |
| topic | phase transformation carbon-free bainite CCT diagram martensitic heat resistant steel nitrides strengthened |
| url | https://www.frontiersin.org/articles/10.3389/fmats.2022.803596/full |
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