High-strong-ductile magnesium alloys by interactions of nanoscale quasi-long period stacking order unit with twin
Magnesium alloys with high strength in combination of good ductility are especially desirable for applications in transportation, aerospace and bio-implants owing to their high stiffness, abundant raw materials, and environmental friendliness. However, the majority of traditional strengthening appro...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2024-12-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724000458 |
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| author | Lutong Zhou Tingting Niu Guodong Zou Huhu Su Suyun He Shijian Zheng Yulong Zhu Peng Chen Carlos Fernandez Qiuming Peng |
| author_facet | Lutong Zhou Tingting Niu Guodong Zou Huhu Su Suyun He Shijian Zheng Yulong Zhu Peng Chen Carlos Fernandez Qiuming Peng |
| author_sort | Lutong Zhou |
| collection | DOAJ |
| description | Magnesium alloys with high strength in combination of good ductility are especially desirable for applications in transportation, aerospace and bio-implants owing to their high stiffness, abundant raw materials, and environmental friendliness. However, the majority of traditional strengthening approaches including grain refining and precipitate strengthening can usually prohibit dislocation movement at the expense of ductility invariably. Herein, we report an effective strategy for simultaneously enhancing yield strength (205 MPa, 2.41 times) and elongation (23%, 1.54 times) in a Mg-0.2Zn-0.6Y (at.%) alloy at room temperature, based on the formation of a nanosized quasi-long period stacking order unit (QLPSO)-twin structure by ultrahigh-pressure treatment followed by annealing. The formation reason and strong-ductile mechanism of the unique QLPSO-twin structure have been clarified by transmission electron microscopy observations and molecule dynamics simulations. The improved strength is mainly associated with the presence of nanosized QLPSO and the modified ∠86.3o QLPSO-twin boundary (TB) interface, effectively pinning dislocation movement. Comparatively, the enhanced ductility is related to the ∠3.7o QLPSO-TB interface and micro-kinks of nanoscale QLPSO, providing some paths for plastic deformation. This strategy on the QLPSO-twin structure might provide an alternative perspective for designing innovative hexagonal close-packed structural materials with superior mechanical properties. |
| format | Article |
| id | doaj-art-7aba8bc93e30459080e7ae6b3a1804da |
| institution | OA Journals |
| issn | 2213-9567 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-7aba8bc93e30459080e7ae6b3a1804da2025-08-20T02:36:12ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672024-12-0112124953496510.1016/j.jma.2024.01.015High-strong-ductile magnesium alloys by interactions of nanoscale quasi-long period stacking order unit with twinLutong Zhou0Tingting Niu1Guodong Zou2Huhu Su3Suyun He4Shijian Zheng5Yulong Zhu6Peng Chen7Carlos Fernandez8Qiuming Peng9State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR ChinaState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR ChinaState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR China; Corresponding authors.School of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300401, PR ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300401, PR ChinaSchool of Materials Science and Engineering, Hebei University of Technology, Tianjin, 300401, PR ChinaKey Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, Changchun 130025, PR ChinaKey Laboratory of Automobile Materials of Ministry of Education & School of Materials Science and Engineering, Nanling Campus, Jilin University, Changchun 130025, PR ChinaSchool of Pharmacy and life sciences, Robert Gordon University, Aberdeen, AB107GJ, UKState Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066004, PR China; Corresponding authors.Magnesium alloys with high strength in combination of good ductility are especially desirable for applications in transportation, aerospace and bio-implants owing to their high stiffness, abundant raw materials, and environmental friendliness. However, the majority of traditional strengthening approaches including grain refining and precipitate strengthening can usually prohibit dislocation movement at the expense of ductility invariably. Herein, we report an effective strategy for simultaneously enhancing yield strength (205 MPa, 2.41 times) and elongation (23%, 1.54 times) in a Mg-0.2Zn-0.6Y (at.%) alloy at room temperature, based on the formation of a nanosized quasi-long period stacking order unit (QLPSO)-twin structure by ultrahigh-pressure treatment followed by annealing. The formation reason and strong-ductile mechanism of the unique QLPSO-twin structure have been clarified by transmission electron microscopy observations and molecule dynamics simulations. The improved strength is mainly associated with the presence of nanosized QLPSO and the modified ∠86.3o QLPSO-twin boundary (TB) interface, effectively pinning dislocation movement. Comparatively, the enhanced ductility is related to the ∠3.7o QLPSO-TB interface and micro-kinks of nanoscale QLPSO, providing some paths for plastic deformation. This strategy on the QLPSO-twin structure might provide an alternative perspective for designing innovative hexagonal close-packed structural materials with superior mechanical properties.http://www.sciencedirect.com/science/article/pii/S2213956724000458QLPSOTwin boundaryMolecule dynamicsHigh resolution TEM |
| spellingShingle | Lutong Zhou Tingting Niu Guodong Zou Huhu Su Suyun He Shijian Zheng Yulong Zhu Peng Chen Carlos Fernandez Qiuming Peng High-strong-ductile magnesium alloys by interactions of nanoscale quasi-long period stacking order unit with twin Journal of Magnesium and Alloys QLPSO Twin boundary Molecule dynamics High resolution TEM |
| title | High-strong-ductile magnesium alloys by interactions of nanoscale quasi-long period stacking order unit with twin |
| title_full | High-strong-ductile magnesium alloys by interactions of nanoscale quasi-long period stacking order unit with twin |
| title_fullStr | High-strong-ductile magnesium alloys by interactions of nanoscale quasi-long period stacking order unit with twin |
| title_full_unstemmed | High-strong-ductile magnesium alloys by interactions of nanoscale quasi-long period stacking order unit with twin |
| title_short | High-strong-ductile magnesium alloys by interactions of nanoscale quasi-long period stacking order unit with twin |
| title_sort | high strong ductile magnesium alloys by interactions of nanoscale quasi long period stacking order unit with twin |
| topic | QLPSO Twin boundary Molecule dynamics High resolution TEM |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724000458 |
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