Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel
Fe–Mn–xAl–C steel ingots have been fabricated by vacuum melting with Al compositions varied from x = 0 to 3 and 5 wt.%, respectively. After properly hot-forging and hot-rolling as well as solution heat treatments, impact toughness tests were carried out at 77 K using a standard full-size of Charpy i...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2024
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| Online Access: | https://hdl.handle.net/10356/173921 |
| _version_ | 1824455038243700736 |
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| author | Li, Leilei Niu, Gang Gong, Na Liu, Hongfei Wang, Xuelin Shang, Chengjia Wang, Yong Wu, Huibin |
| author2 | School of Materials Science and Engineering |
| author_facet | School of Materials Science and Engineering Li, Leilei Niu, Gang Gong, Na Liu, Hongfei Wang, Xuelin Shang, Chengjia Wang, Yong Wu, Huibin |
| author_sort | Li, Leilei |
| collection | NTU |
| description | Fe–Mn–xAl–C steel ingots have been fabricated by vacuum melting with Al compositions varied from x = 0 to 3 and 5 wt.%, respectively. After properly hot-forging and hot-rolling as well as solution heat treatments, impact toughness tests were carried out at 77 K using a standard full-size of Charpy impact V-notch configuration. It was found that the addition of Al element is more conducive to enhance the cryogenic toughness. The relationship between the cryogenic toughness and the Al composition has been revealed through detailed microstructural studies by electron back scatter diffraction and transmission-electron microscopy. The stack fault energy (SFE) increases with the increase of Al content at various temperature. The plastic deformation is dominated by deformation bands which are dominated by deformation twins (DTs) and ε-martensite at x = 0 and DTs at x = 3 and 5%, respectively. The DTs near fracture the notch-tip area increased in the order of the 0Al, 3Al, and 5Al steel. The DTs with high density, together with their contented dislocations, significantly contributed to the high cryogenic toughness of the studied high manganese steel with higher Al content. Banded ε-martensite will deterioration cryogenic toughness due to its large size compared to DTs at 0Al steel. |
| first_indexed | 2025-02-19T03:31:51Z |
| format | Journal Article |
| id | ntu-10356/173921 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2025-02-19T03:31:51Z |
| publishDate | 2024 |
| record_format | dspace |
| spelling | ntu-10356/1739212024-03-08T15:46:07Z Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel Li, Leilei Niu, Gang Gong, Na Liu, Hongfei Wang, Xuelin Shang, Chengjia Wang, Yong Wu, Huibin School of Materials Science and Engineering Engineering Cryogenic toughness Deformation twin Fe–Mn–xAl–C steel ingots have been fabricated by vacuum melting with Al compositions varied from x = 0 to 3 and 5 wt.%, respectively. After properly hot-forging and hot-rolling as well as solution heat treatments, impact toughness tests were carried out at 77 K using a standard full-size of Charpy impact V-notch configuration. It was found that the addition of Al element is more conducive to enhance the cryogenic toughness. The relationship between the cryogenic toughness and the Al composition has been revealed through detailed microstructural studies by electron back scatter diffraction and transmission-electron microscopy. The stack fault energy (SFE) increases with the increase of Al content at various temperature. The plastic deformation is dominated by deformation bands which are dominated by deformation twins (DTs) and ε-martensite at x = 0 and DTs at x = 3 and 5%, respectively. The DTs near fracture the notch-tip area increased in the order of the 0Al, 3Al, and 5Al steel. The DTs with high density, together with their contented dislocations, significantly contributed to the high cryogenic toughness of the studied high manganese steel with higher Al content. Banded ε-martensite will deterioration cryogenic toughness due to its large size compared to DTs at 0Al steel. Published version This work was supported from the National Key R&D Program of China (grant number 2017YFB0305003-01 ) and China Postdoctoral Science Foundation (2022M720402). 2024-03-06T04:00:09Z 2024-03-06T04:00:09Z 2023 Journal Article Li, L., Niu, G., Gong, N., Liu, H., Wang, X., Shang, C., Wang, Y. & Wu, H. (2023). Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel. Journal of Materials Research and Technology, 27, 262-271. https://dx.doi.org/10.1016/j.jmrt.2023.09.255 2238-7854 https://hdl.handle.net/10356/173921 10.1016/j.jmrt.2023.09.255 2-s2.0-85173428146 27 262 271 en Journal of Materials Research and Technology © 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). application/pdf |
| spellingShingle | Engineering Cryogenic toughness Deformation twin Li, Leilei Niu, Gang Gong, Na Liu, Hongfei Wang, Xuelin Shang, Chengjia Wang, Yong Wu, Huibin Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel |
| title | Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel |
| title_full | Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel |
| title_fullStr | Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel |
| title_full_unstemmed | Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel |
| title_short | Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel |
| title_sort | influence of banded ε martensite and deformation twin on cryogenic toughness of fe mn xal c steel |
| topic | Engineering Cryogenic toughness Deformation twin |
| url | https://hdl.handle.net/10356/173921 |
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