Identification of Retained Austenite in 9Cr-1.4W-0.06Ta-0.12C Reduced Activation Ferritic Martensitic Steel
Reduced activation ferritic martensitic (RAFM) 9Cr steels, which are candidate materials for the test blanket module (TBM) of nuclear fusion reactors, are considered to be air hardenable. However, alloy composition and the processing conditions play a significant role during the transformation of au...
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MDPI AG
2022-01-01
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| Series: | Symmetry |
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| Online Access: | https://www.mdpi.com/2073-8994/14/2/196 |
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| author | Rengachari Mythili Ravi Kirana Loushambam Herojit Singh Ramanujam Govindaraj Anil K. Sinha Manvendra N. Singh Saibaba Saroja Muraleedharan Vijayalakshmi Sudip K. Deb |
| author_facet | Rengachari Mythili Ravi Kirana Loushambam Herojit Singh Ramanujam Govindaraj Anil K. Sinha Manvendra N. Singh Saibaba Saroja Muraleedharan Vijayalakshmi Sudip K. Deb |
| author_sort | Rengachari Mythili |
| collection | DOAJ |
| description | Reduced activation ferritic martensitic (RAFM) 9Cr steels, which are candidate materials for the test blanket module (TBM) of nuclear fusion reactors, are considered to be air hardenable. However, alloy composition and the processing conditions play a significant role during the transformation of austenite to martensite/ferrite on cooling. The presence of retained austenite is known to influence the mechanical properties of the steel. Identifying very low amounts of retained austenite is very challenging though conventional microscopy. This paper aims at identifying a low amount of retained austenite in normalized 9Cr-1.4W-0.06Ta-0.12C RAFM steel using synchrotron X-ray diffraction and Mossbauer spectroscopy and confirmed by advanced automated crystal orientation mapping in transmission electron microscopy. Homogeneity of austenite has been understood to influence the microstructure of the normalized steel, which is discussed in detail. |
| first_indexed | 2024-03-09T20:59:08Z |
| format | Article |
| id | doaj.art-313a2c4901c241e19511078bbff5c4f2 |
| institution | Directory Open Access Journal |
| issn | 2073-8994 |
| language | English |
| last_indexed | 2024-03-09T20:59:08Z |
| publishDate | 2022-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Symmetry |
| spelling | doaj.art-313a2c4901c241e19511078bbff5c4f22023-11-23T22:14:51ZengMDPI AGSymmetry2073-89942022-01-0114219610.3390/sym14020196Identification of Retained Austenite in 9Cr-1.4W-0.06Ta-0.12C Reduced Activation Ferritic Martensitic SteelRengachari Mythili0Ravi Kirana1Loushambam Herojit Singh2Ramanujam Govindaraj3Anil K. Sinha4Manvendra N. Singh5Saibaba Saroja6Muraleedharan Vijayalakshmi7Sudip K. Deb8Metallurgy & Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, IndiaDepartment of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur 603203, IndiaDepartment of Physics, NIT Manipur, Langol 795004, IndiaHomi Bhabha National Institute at IGCAR, Kalpakkam 603102, IndiaDepartment of Physics, University of Petroleum and Energy Studies, Dehradun 248007, IndiaRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaMetallurgy & Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, IndiaMetallurgy & Materials Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, IndiaRaja Ramanna Centre for Advanced Technology, Indore 452013, IndiaReduced activation ferritic martensitic (RAFM) 9Cr steels, which are candidate materials for the test blanket module (TBM) of nuclear fusion reactors, are considered to be air hardenable. However, alloy composition and the processing conditions play a significant role during the transformation of austenite to martensite/ferrite on cooling. The presence of retained austenite is known to influence the mechanical properties of the steel. Identifying very low amounts of retained austenite is very challenging though conventional microscopy. This paper aims at identifying a low amount of retained austenite in normalized 9Cr-1.4W-0.06Ta-0.12C RAFM steel using synchrotron X-ray diffraction and Mossbauer spectroscopy and confirmed by advanced automated crystal orientation mapping in transmission electron microscopy. Homogeneity of austenite has been understood to influence the microstructure of the normalized steel, which is discussed in detail.https://www.mdpi.com/2073-8994/14/2/196reduced activation ferritic martensitic steelmicrostructuremartensiteretained austeniteautomated crystal orientation mapping-transmission electron microscopyMossbauer spectroscopy |
| spellingShingle | Rengachari Mythili Ravi Kirana Loushambam Herojit Singh Ramanujam Govindaraj Anil K. Sinha Manvendra N. Singh Saibaba Saroja Muraleedharan Vijayalakshmi Sudip K. Deb Identification of Retained Austenite in 9Cr-1.4W-0.06Ta-0.12C Reduced Activation Ferritic Martensitic Steel Symmetry reduced activation ferritic martensitic steel microstructure martensite retained austenite automated crystal orientation mapping-transmission electron microscopy Mossbauer spectroscopy |
| title | Identification of Retained Austenite in 9Cr-1.4W-0.06Ta-0.12C Reduced Activation Ferritic Martensitic Steel |
| title_full | Identification of Retained Austenite in 9Cr-1.4W-0.06Ta-0.12C Reduced Activation Ferritic Martensitic Steel |
| title_fullStr | Identification of Retained Austenite in 9Cr-1.4W-0.06Ta-0.12C Reduced Activation Ferritic Martensitic Steel |
| title_full_unstemmed | Identification of Retained Austenite in 9Cr-1.4W-0.06Ta-0.12C Reduced Activation Ferritic Martensitic Steel |
| title_short | Identification of Retained Austenite in 9Cr-1.4W-0.06Ta-0.12C Reduced Activation Ferritic Martensitic Steel |
| title_sort | identification of retained austenite in 9cr 1 4w 0 06ta 0 12c reduced activation ferritic martensitic steel |
| topic | reduced activation ferritic martensitic steel microstructure martensite retained austenite automated crystal orientation mapping-transmission electron microscopy Mossbauer spectroscopy |
| url | https://www.mdpi.com/2073-8994/14/2/196 |
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