Amorphous alloys surpass E/10 strength limit at extreme strain rates
Theoretical predictions of the ideal strength of materials range from E/30 to E/10 (E is Young's modulus). However, despite intense interest over the last decade, the value of the ideal strength achievable through experiments for metals remains a mystery. This study showcases the remarkable spa...
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sg-ntu-dr.10356-1749182024-04-20T16:49:39Z Amorphous alloys surpass E/10 strength limit at extreme strain rates Zhu, Wenqing Li, Zhi Shu, Hua Gao, Huajian Wei, Xiaoding School of Mechanical and Aerospace Engineering Institute of High Performance Computing, A*STAR Engineering Molecular analysis Nucleation Theoretical predictions of the ideal strength of materials range from E/30 to E/10 (E is Young's modulus). However, despite intense interest over the last decade, the value of the ideal strength achievable through experiments for metals remains a mystery. This study showcases the remarkable spall strength of Cu50Zr50 amorphous alloy that exceeds the E/10 limit at strain rates greater than 107 s-1 through laser-induced shock experiments. The material exhibits a spall strength of 11.5 GPa, approximately E/6 or 1/13 of its P-wave modulus, which sets a record for the elastic limit of metals. Electron microscopy and large-scale molecular dynamics simulations reveal that the primary failure mechanism at extreme strain rates is void nucleation and growth, rather than shear-banding. The rate dependence of material strength is explained by a void kinetic model controlled by surface energy. These findings help advance our understanding on the mechanical behavior of amorphous alloys under extreme strain rates. Agency for Science, Technology and Research (A*STAR) Nanyang Technological University Published version X.W. greatly appreciates the support by the National Natural Science Foundation of China (Grant Nos. 12325202, 12172005, 11890681, and 11988102), and the National Key R&D Program of China (Grant No. 2022YFB3806102). H.G. and Z.L. acknowledge a research startup grant (002479-00001) from Nanyang Technological University and the Agency for Science, Technology and Research (A*STAR) in Singapore. 2024-04-16T04:11:14Z 2024-04-16T04:11:14Z 2024 Journal Article Zhu, W., Li, Z., Shu, H., Gao, H. & Wei, X. (2024). Amorphous alloys surpass E/10 strength limit at extreme strain rates. Nature Communications, 15(1), 1717-. https://dx.doi.org/10.1038/s41467-024-45472-z 2041-1723 https://hdl.handle.net/10356/174918 10.1038/s41467-024-45472-z 38403631 2-s2.0-85185979605 1 15 1717 en 002479-00001 Nature Communications © The Author(s) 2024. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/ licenses/by/4.0/. application/pdf |
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Engineering Molecular analysis Nucleation Zhu, Wenqing Li, Zhi Shu, Hua Gao, Huajian Wei, Xiaoding Amorphous alloys surpass E/10 strength limit at extreme strain rates |
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Theoretical predictions of the ideal strength of materials range from E/30 to E/10 (E is Young's modulus). However, despite intense interest over the last decade, the value of the ideal strength achievable through experiments for metals remains a mystery. This study showcases the remarkable spall strength of Cu50Zr50 amorphous alloy that exceeds the E/10 limit at strain rates greater than 107 s-1 through laser-induced shock experiments. The material exhibits a spall strength of 11.5 GPa, approximately E/6 or 1/13 of its P-wave modulus, which sets a record for the elastic limit of metals. Electron microscopy and large-scale molecular dynamics simulations reveal that the primary failure mechanism at extreme strain rates is void nucleation and growth, rather than shear-banding. The rate dependence of material strength is explained by a void kinetic model controlled by surface energy. These findings help advance our understanding on the mechanical behavior of amorphous alloys under extreme strain rates. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Zhu, Wenqing Li, Zhi Shu, Hua Gao, Huajian Wei, Xiaoding |
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Article |
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Zhu, Wenqing Li, Zhi Shu, Hua Gao, Huajian Wei, Xiaoding |
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Zhu, Wenqing |
title |
Amorphous alloys surpass E/10 strength limit at extreme strain rates |
title_short |
Amorphous alloys surpass E/10 strength limit at extreme strain rates |
title_full |
Amorphous alloys surpass E/10 strength limit at extreme strain rates |
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Amorphous alloys surpass E/10 strength limit at extreme strain rates |
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Amorphous alloys surpass E/10 strength limit at extreme strain rates |
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amorphous alloys surpass e/10 strength limit at extreme strain rates |
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2024 |
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https://hdl.handle.net/10356/174918 |
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