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: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-11-01
|
| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785423023815 |
| _version_ | 1797301596525166592 |
|---|---|
| author | Leilei Li Gang Niu Na Gong Hongfei Liu Xuelin Wang Chengjia Shang Yong Wang Huibin Wu |
| author_facet | Leilei Li Gang Niu Na Gong Hongfei Liu Xuelin Wang Chengjia Shang Yong Wang Huibin Wu |
| author_sort | Leilei Li |
| collection | DOAJ |
| 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 | 2024-03-07T23:23:54Z |
| format | Article |
| id | doaj.art-7ed7f88b80c24ce2b5bd21206df386b1 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-07T23:23:54Z |
| publishDate | 2023-11-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-7ed7f88b80c24ce2b5bd21206df386b12024-02-21T05:25:14ZengElsevierJournal of Materials Research and Technology2238-78542023-11-0127262271Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steelLeilei Li0Gang Niu1Na Gong2Hongfei Liu3Xuelin Wang4Chengjia Shang5Yong Wang6Huibin Wu7Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing 100083, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing 100083, China; Yangjiang Branch, Guangdong Laboratory for Materials Science and Technology (Yangjiang Advanced Alloys Laboratory), Yangjiang, Guangdong 529500, China; Corresponding author. Yangjiang Branch, Guangdong Laboratory for Materials Science and Technology (Yangjiang Advanced Alloys Laboratory), Yangjiang, Guangdong 529500, China.Institute of Materials Research and Engineering (IMRE), A∗STAR (Agency for Science, Technology and Research), Singapore 138634, SingaporeInstitute of Materials Research and Engineering (IMRE), A∗STAR (Agency for Science, Technology and Research), Singapore 138634, SingaporeCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing 100083, China; Yangjiang Branch, Guangdong Laboratory for Materials Science and Technology (Yangjiang Advanced Alloys Laboratory), Yangjiang, Guangdong 529500, ChinaCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing 100083, China; Yangjiang Branch, Guangdong Laboratory for Materials Science and Technology (Yangjiang Advanced Alloys Laboratory), Yangjiang, Guangdong 529500, ChinaSchool of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, SingaporeCollaborative Innovation Center of Steel Technology, University of Science and Technology Beijing 100083, China; Yangjiang Branch, Guangdong Laboratory for Materials Science and Technology (Yangjiang Advanced Alloys Laboratory), Yangjiang, Guangdong 529500, China; Corresponding author. Collaborative Innovation Center of Steel Technology, University of Science and Technology Beijing 100083, China.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.http://www.sciencedirect.com/science/article/pii/S2238785423023815Fe–Mn–Al–C steelε-martensiteCryogenic toughnessDeformation twin |
| spellingShingle | Leilei Li Gang Niu Na Gong Hongfei Liu Xuelin Wang Chengjia Shang Yong Wang Huibin Wu Influence of banded ε-martensite and deformation twin on cryogenic toughness of Fe–Mn–xAl–C steel Journal of Materials Research and Technology Fe–Mn–Al–C steel ε-martensite Cryogenic toughness Deformation twin |
| 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 | Fe–Mn–Al–C steel ε-martensite Cryogenic toughness Deformation twin |
| url | http://www.sciencedirect.com/science/article/pii/S2238785423023815 |
| work_keys_str_mv | AT leileili influenceofbandedemartensiteanddeformationtwinoncryogenictoughnessoffemnxalcsteel AT gangniu influenceofbandedemartensiteanddeformationtwinoncryogenictoughnessoffemnxalcsteel AT nagong influenceofbandedemartensiteanddeformationtwinoncryogenictoughnessoffemnxalcsteel AT hongfeiliu influenceofbandedemartensiteanddeformationtwinoncryogenictoughnessoffemnxalcsteel AT xuelinwang influenceofbandedemartensiteanddeformationtwinoncryogenictoughnessoffemnxalcsteel AT chengjiashang influenceofbandedemartensiteanddeformationtwinoncryogenictoughnessoffemnxalcsteel AT yongwang influenceofbandedemartensiteanddeformationtwinoncryogenictoughnessoffemnxalcsteel AT huibinwu influenceofbandedemartensiteanddeformationtwinoncryogenictoughnessoffemnxalcsteel |