Near-ideal strength and large compressive deformability of a nano-dual-phase 
glass-crystal alloy in sub-micron

Wu, Ge; Sun, Ligang; Zhu, Linli; Liu, Chang; Wang, Qing; Bao, Yan; Lu, Jian

doi:10.1016/j.scriptamat.2020.07.056

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Near-ideal strength and large compressive deformability of a nano-dual-phase glass-crystal alloy in sub-micron

Wu, G., Sun, L., Zhu, L., Liu, C., Wang, Q., Bao, Y., et al. (2020). Near-ideal strength and large compressive deformability of a nano-dual-phase glass-crystal alloy in sub-micron. Scripta Materialia, 188, 290-295. doi:10.1016/j.scriptamat.2020.07.056.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-6F84-6 Version Permalink: https://hdl.handle.net/21.11116/0000-0009-6F87-3

Genre: Journal Article

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Creators:
Wu, Ge^{1, 2}, Author
Sun, Ligang^{3, 4}, Author
Zhu, Linli^{1, 5}, Author
Liu, Chang^{1, 2}, Author
Wang, Qing^{6, 7}, Author
Bao, Yan¹, Author
Lu, Jian^{3, 8, 9, 10}, Author

Affiliations:
1Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China, ou_persistent22
2High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3010672
3Hong Kong Branch of National Precious Metals Material Engineering Research Centre, City University of Hong Kong, Hong Kong, China, ou_persistent22
4School of Science, Harbin Institute of Technology, Shenzhen 518055, China, ou_persistent22
5Department of Engineering Mechanics and Key Laboratory of Soft Machines and Smart Devices of Zhejiang Province, Zhejiang University, Hangzhou 310027, China, ou_persistent22
6Department of Mechanical Engineering, City University of Hong Kong, Kowloon, Hong Kong, China, ou_persistent22
7Laboratory for Microstructures, Institute of Materials Science, Shanghai University, Shanghai 200072, China, ou_persistent22
8Centre for Advanced Structural Materials, City University of Hong Kong Shenzhen Research Institute, Greater Bay Joint Division, Shenyang National Laboratory for Materials Science, Shenzhen 518057, China, ou_persistent22
9Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China, ou_persistent22
10Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, China, ou_persistent22

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Free keywords: Crystals; Deformation; Electromechanical devices; Formability; Glass; Grain refinement; Molecular dynamics; Nanocrystalline materials; NEMS; Transmission electron microscopy, Compressive strain; Crystal alloys; Crystalline phase; Flexible device; Ideal strength; Material designs; Nano electromechanical systems; Structural unit, Compressive strength

Abstract: We report a room temperature ultrahigh yield strength (3.0 GPa in compression) and large deformability (above 50 compressive strain) of a magnesium-based nano-dual-phase glass-crystal alloy in sub-micro size, compared with brittle nature of its own structural units. Transmission electron microscope investigation, molecular dynamic simulation and constitutive modeling were conducted, showing that the nanostructure of extremely small sized nanocrystals embedded in the glassy shells results in near-ideal strength; plastic flow of the glassy phase and grain refinement of the crystalline phase contribute to the large deformability. This material design may provide broad implications in wearable flexible devices and high-performance nano-electromechanical systems. © 2020

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Language(s): eng - English

Dates: Date issued: 2020-11

Publication Status: Issued

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Identifiers: DOI: 10.1016/j.scriptamat.2020.07.056

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Title: Scripta Materialia

Abbreviation : Scripta Mater.

Source Genre: Journal

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Publ. Info: Amsterdam : Elsevier B. V.

Pages: - Volume / Issue: 188 Sequence Number: - Start / End Page: 290 - 295 Identifier: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506