Dynamic mechanical response and deformation-induced co-axial nanocrystalline grains facilitating crack formation in magnesium-yttrium alloy
The dynamic mechanical response and deformation mechanism of magnesium-yttrium alloy at high strain rate were investigated using split-Hopkinson pressure bar (SHPB) impact, and the microstructure evolution and crack formation mechanism were revealed. The yield strength and work hardening rate increa...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2025-01-01
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| Series: | Journal of Magnesium and Alloys |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2213956724003104 |
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| author | Shuang Yang Fei Liu Fei Chen Yuan-Biao Tan Hao Fu Si-Yuan Wei Song Xiang |
| author_facet | Shuang Yang Fei Liu Fei Chen Yuan-Biao Tan Hao Fu Si-Yuan Wei Song Xiang |
| author_sort | Shuang Yang |
| collection | DOAJ |
| description | The dynamic mechanical response and deformation mechanism of magnesium-yttrium alloy at high strain rate were investigated using split-Hopkinson pressure bar (SHPB) impact, and the microstructure evolution and crack formation mechanism were revealed. The yield strength and work hardening rate increase significantly with increasing impact strain rate. Deformation twinning and non-basal dislocation slip are the primary deformation mechanisms during testing. Contrary to crack initiation mechanism facilitated by adiabatic shear bands, we find that high-density co-axial nanocrystalline grains form near cracks, which leads to local softening and promotes crack initiation and rapid propagation. Most grains have similar 〈1¯21¯0〉 orientations, with unique misorientation of 24°, 32°, 62°, 78° and 90° between adjacent grains, suggesting that these grains are primarily formed by interface transformation, which exhibits distinct differences from recrystallized grains. Our results shed light upon the dynamic mechanical response and crack formation mechanism in magnesium alloys under impact deformation. |
| format | Article |
| id | doaj-art-f7d1fbc3ef24466b99e65e4ab1340cb8 |
| institution | Kabale University |
| issn | 2213-9567 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Magnesium and Alloys |
| spelling | doaj-art-f7d1fbc3ef24466b99e65e4ab1340cb82025-02-06T05:11:42ZengKeAi Communications Co., Ltd.Journal of Magnesium and Alloys2213-95672025-01-01131429441Dynamic mechanical response and deformation-induced co-axial nanocrystalline grains facilitating crack formation in magnesium-yttrium alloyShuang Yang0Fei Liu1Fei Chen2Yuan-Biao Tan3Hao Fu4Si-Yuan Wei5Song Xiang6Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, National and Local Joint Engineering Laboratory for High Performance Metal Structure Materials and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaKey Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, National and Local Joint Engineering Laboratory for High Performance Metal Structure Materials and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; School of Mechanical and Aerospace Engineering, Nanyang Technological University, Singapore, Republic of Singapore; Corresponding author at: Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, National and Local Joint Engineering Laboratory for High Performance Metal Structure Materials and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China.Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, National and Local Joint Engineering Laboratory for High Performance Metal Structure Materials and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaKey Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, National and Local Joint Engineering Laboratory for High Performance Metal Structure Materials and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaKey Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, National and Local Joint Engineering Laboratory for High Performance Metal Structure Materials and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, ChinaInstitute of Materials Research and Engineering (IMRE), Agency for Science, Technology and Research (A*STAR), 2 Fusionopolis Way, Innovis #08-03, Singapore 138634, Republic of Singapore; Corresponding authors.Key Laboratory for Mechanical Behavior and Microstructure of Materials of Guizhou Province, National and Local Joint Engineering Laboratory for High Performance Metal Structure Materials and Advanced Manufacturing Technology, College of Materials and Metallurgy, Guizhou University, Guiyang 550025, China; Corresponding authors.The dynamic mechanical response and deformation mechanism of magnesium-yttrium alloy at high strain rate were investigated using split-Hopkinson pressure bar (SHPB) impact, and the microstructure evolution and crack formation mechanism were revealed. The yield strength and work hardening rate increase significantly with increasing impact strain rate. Deformation twinning and non-basal dislocation slip are the primary deformation mechanisms during testing. Contrary to crack initiation mechanism facilitated by adiabatic shear bands, we find that high-density co-axial nanocrystalline grains form near cracks, which leads to local softening and promotes crack initiation and rapid propagation. Most grains have similar 〈1¯21¯0〉 orientations, with unique misorientation of 24°, 32°, 62°, 78° and 90° between adjacent grains, suggesting that these grains are primarily formed by interface transformation, which exhibits distinct differences from recrystallized grains. Our results shed light upon the dynamic mechanical response and crack formation mechanism in magnesium alloys under impact deformation.http://www.sciencedirect.com/science/article/pii/S2213956724003104Magnesium-yttrium alloySHPB impactCrack initiationCo-axial nanocrystalline grainsInterface transformation |
| spellingShingle | Shuang Yang Fei Liu Fei Chen Yuan-Biao Tan Hao Fu Si-Yuan Wei Song Xiang Dynamic mechanical response and deformation-induced co-axial nanocrystalline grains facilitating crack formation in magnesium-yttrium alloy Journal of Magnesium and Alloys Magnesium-yttrium alloy SHPB impact Crack initiation Co-axial nanocrystalline grains Interface transformation |
| title | Dynamic mechanical response and deformation-induced co-axial nanocrystalline grains facilitating crack formation in magnesium-yttrium alloy |
| title_full | Dynamic mechanical response and deformation-induced co-axial nanocrystalline grains facilitating crack formation in magnesium-yttrium alloy |
| title_fullStr | Dynamic mechanical response and deformation-induced co-axial nanocrystalline grains facilitating crack formation in magnesium-yttrium alloy |
| title_full_unstemmed | Dynamic mechanical response and deformation-induced co-axial nanocrystalline grains facilitating crack formation in magnesium-yttrium alloy |
| title_short | Dynamic mechanical response and deformation-induced co-axial nanocrystalline grains facilitating crack formation in magnesium-yttrium alloy |
| title_sort | dynamic mechanical response and deformation induced co axial nanocrystalline grains facilitating crack formation in magnesium yttrium alloy |
| topic | Magnesium-yttrium alloy SHPB impact Crack initiation Co-axial nanocrystalline grains Interface transformation |
| url | http://www.sciencedirect.com/science/article/pii/S2213956724003104 |
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