Influence of crystallographic orientations and nanovoid on the plastic mechanism and damage behavior of single-crystal tungsten under shock
In this work, we investigated the shock response of single-crystal tungsten with pre-existing voids using nonequilibrium molecular dynamics simulations, considering four crystallographic orientations ([100], [110], [111], and [112]). The results reveal that the presence of nanovoids significantly re...
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Elsevier
2025-03-01
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| Series: | Journal of Materials Research and Technology |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785425000419 |
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| author | Ziyi Li Wensheng Liu Yunzhu Ma Chaoping Liang |
| author_facet | Ziyi Li Wensheng Liu Yunzhu Ma Chaoping Liang |
| author_sort | Ziyi Li |
| collection | DOAJ |
| description | In this work, we investigated the shock response of single-crystal tungsten with pre-existing voids using nonequilibrium molecular dynamics simulations, considering four crystallographic orientations ([100], [110], [111], and [112]). The results reveal that the presence of nanovoids significantly reduces the spall strength of tungsten. For perfect single crystals, the spall strength is highest along [111] (47.65 GPa) and [112] (42.89 GPa), while [110] exhibits the lowest value (32.79 GPa). However, with a void radius of 1.644 nm, the spall strength of [111] and [112] decreases sharply to 24.14 GPa and 20.16 GPa, respectively. In contrast, the spall strength reduction is minimal for [100] and [110]. Various plastic deformation mechanisms, such as dislocation emission, twinning, and prismatic loop formation, were observed during shock compression, with distinct differences between perfect and void-containing samples. These mechanisms and the associated microstructural evolution explain the anisotropic spallation behavior and provide insights into the rapid decline in spall strength for specific orientations. |
| format | Article |
| id | doaj-art-c22c891960cd4d6c9795c8e577c41f48 |
| institution | Kabale University |
| issn | 2238-7854 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj-art-c22c891960cd4d6c9795c8e577c41f482025-01-16T04:28:48ZengElsevierJournal of Materials Research and Technology2238-78542025-03-0135714725Influence of crystallographic orientations and nanovoid on the plastic mechanism and damage behavior of single-crystal tungsten under shockZiyi Li0Wensheng Liu1Yunzhu Ma2Chaoping Liang3National Key Laboratory of Science and Technology for High–strength Structural Materials, Central South University, Changsha, 410083, ChinaCorresponding author.; National Key Laboratory of Science and Technology for High–strength Structural Materials, Central South University, Changsha, 410083, ChinaNational Key Laboratory of Science and Technology for High–strength Structural Materials, Central South University, Changsha, 410083, ChinaCorresponding author.; National Key Laboratory of Science and Technology for High–strength Structural Materials, Central South University, Changsha, 410083, ChinaIn this work, we investigated the shock response of single-crystal tungsten with pre-existing voids using nonequilibrium molecular dynamics simulations, considering four crystallographic orientations ([100], [110], [111], and [112]). The results reveal that the presence of nanovoids significantly reduces the spall strength of tungsten. For perfect single crystals, the spall strength is highest along [111] (47.65 GPa) and [112] (42.89 GPa), while [110] exhibits the lowest value (32.79 GPa). However, with a void radius of 1.644 nm, the spall strength of [111] and [112] decreases sharply to 24.14 GPa and 20.16 GPa, respectively. In contrast, the spall strength reduction is minimal for [100] and [110]. Various plastic deformation mechanisms, such as dislocation emission, twinning, and prismatic loop formation, were observed during shock compression, with distinct differences between perfect and void-containing samples. These mechanisms and the associated microstructural evolution explain the anisotropic spallation behavior and provide insights into the rapid decline in spall strength for specific orientations.http://www.sciencedirect.com/science/article/pii/S2238785425000419 |
| spellingShingle | Ziyi Li Wensheng Liu Yunzhu Ma Chaoping Liang Influence of crystallographic orientations and nanovoid on the plastic mechanism and damage behavior of single-crystal tungsten under shock Journal of Materials Research and Technology |
| title | Influence of crystallographic orientations and nanovoid on the plastic mechanism and damage behavior of single-crystal tungsten under shock |
| title_full | Influence of crystallographic orientations and nanovoid on the plastic mechanism and damage behavior of single-crystal tungsten under shock |
| title_fullStr | Influence of crystallographic orientations and nanovoid on the plastic mechanism and damage behavior of single-crystal tungsten under shock |
| title_full_unstemmed | Influence of crystallographic orientations and nanovoid on the plastic mechanism and damage behavior of single-crystal tungsten under shock |
| title_short | Influence of crystallographic orientations and nanovoid on the plastic mechanism and damage behavior of single-crystal tungsten under shock |
| title_sort | influence of crystallographic orientations and nanovoid on the plastic mechanism and damage behavior of single crystal tungsten under shock |
| url | http://www.sciencedirect.com/science/article/pii/S2238785425000419 |
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