Deformation mechanism of dislocation slip and kinking behaviour in dynamic compression response of TiZrHfNb alloy fabricated by laser directed energy deposition
In this study, the dynamic response and deformation mechanism of TiZrHfNb RHEA fabricated by laser directed energy deposition (L-DED) were researched under a dynamic compression test at a nominal strain rate of 3500 s−1. The L-DED TiZrHfNb alloy with columnar grains exhibits exceptional mechanical p...
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| Format: | Article |
| Language: | English |
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Taylor & Francis Group
2024-12-01
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| Series: | Virtual and Physical Prototyping |
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| Online Access: | https://www.tandfonline.com/doi/10.1080/17452759.2024.2406411 |
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| author | Chunjie Shen Xu Cheng Zhuo Li Chen Yang Yansong Zhang Ruiqi Li |
| author_facet | Chunjie Shen Xu Cheng Zhuo Li Chen Yang Yansong Zhang Ruiqi Li |
| author_sort | Chunjie Shen |
| collection | DOAJ |
| description | In this study, the dynamic response and deformation mechanism of TiZrHfNb RHEA fabricated by laser directed energy deposition (L-DED) were researched under a dynamic compression test at a nominal strain rate of 3500 s−1. The L-DED TiZrHfNb alloy with columnar grains exhibits exceptional mechanical properties with a uniform dynamic flow stress of 1670 ± 10 MPa and a maximum plastic strain of 0.28 ± 0.03. The dislocation slipping and kinking behaviour dominate uniform plastic deformation. First, the dislocations are primarily confined within dislocation channels due to coplanar slip, and the evolution of them in dynamic compressive deformation process has undergone spacing refinement and crossing. Furthermore, the kinking behaviour induced by the lattice rotation with the T = <011> axis denotes the work hardening effect. Particularly, the second kinking behaviour effectively relieves local stress concentration and delays fracture before the formation of adiabatic shear band (ASB). |
| format | Article |
| id | doaj-art-9d98f4a1a0264972a4e683d170f003dc |
| institution | OA Journals |
| issn | 1745-2759 1745-2767 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Virtual and Physical Prototyping |
| spelling | doaj-art-9d98f4a1a0264972a4e683d170f003dc2025-08-20T01:54:58ZengTaylor & Francis GroupVirtual and Physical Prototyping1745-27591745-27672024-12-0119110.1080/17452759.2024.2406411Deformation mechanism of dislocation slip and kinking behaviour in dynamic compression response of TiZrHfNb alloy fabricated by laser directed energy depositionChunjie Shen0Xu Cheng1Zhuo Li2Chen Yang3Yansong Zhang4Ruiqi Li5School of Materials Science and Engineering, Beihang University, Beijing, People’s Republic of ChinaSchool of Materials Science and Engineering, Beihang University, Beijing, People’s Republic of ChinaSchool of Materials Science and Engineering, Beihang University, Beijing, People’s Republic of ChinaSchool of Materials Science and Engineering, Beihang University, Beijing, People’s Republic of ChinaSchool of Materials Science and Engineering, Beihang University, Beijing, People’s Republic of ChinaNational Engineering Laboratory of Additive Manufacturing for Large Metallic Components, Beihang University, Beijing, People’s Republic of ChinaIn this study, the dynamic response and deformation mechanism of TiZrHfNb RHEA fabricated by laser directed energy deposition (L-DED) were researched under a dynamic compression test at a nominal strain rate of 3500 s−1. The L-DED TiZrHfNb alloy with columnar grains exhibits exceptional mechanical properties with a uniform dynamic flow stress of 1670 ± 10 MPa and a maximum plastic strain of 0.28 ± 0.03. The dislocation slipping and kinking behaviour dominate uniform plastic deformation. First, the dislocations are primarily confined within dislocation channels due to coplanar slip, and the evolution of them in dynamic compressive deformation process has undergone spacing refinement and crossing. Furthermore, the kinking behaviour induced by the lattice rotation with the T = <011> axis denotes the work hardening effect. Particularly, the second kinking behaviour effectively relieves local stress concentration and delays fracture before the formation of adiabatic shear band (ASB).https://www.tandfonline.com/doi/10.1080/17452759.2024.2406411TiZrHfNbL-DEDdynamic compressiondislocation channelkinking behaviour |
| spellingShingle | Chunjie Shen Xu Cheng Zhuo Li Chen Yang Yansong Zhang Ruiqi Li Deformation mechanism of dislocation slip and kinking behaviour in dynamic compression response of TiZrHfNb alloy fabricated by laser directed energy deposition Virtual and Physical Prototyping TiZrHfNb L-DED dynamic compression dislocation channel kinking behaviour |
| title | Deformation mechanism of dislocation slip and kinking behaviour in dynamic compression response of TiZrHfNb alloy fabricated by laser directed energy deposition |
| title_full | Deformation mechanism of dislocation slip and kinking behaviour in dynamic compression response of TiZrHfNb alloy fabricated by laser directed energy deposition |
| title_fullStr | Deformation mechanism of dislocation slip and kinking behaviour in dynamic compression response of TiZrHfNb alloy fabricated by laser directed energy deposition |
| title_full_unstemmed | Deformation mechanism of dislocation slip and kinking behaviour in dynamic compression response of TiZrHfNb alloy fabricated by laser directed energy deposition |
| title_short | Deformation mechanism of dislocation slip and kinking behaviour in dynamic compression response of TiZrHfNb alloy fabricated by laser directed energy deposition |
| title_sort | deformation mechanism of dislocation slip and kinking behaviour in dynamic compression response of tizrhfnb alloy fabricated by laser directed energy deposition |
| topic | TiZrHfNb L-DED dynamic compression dislocation channel kinking behaviour |
| url | https://www.tandfonline.com/doi/10.1080/17452759.2024.2406411 |
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