Ductility of an ultrastrong glass-crystal nano-dual-phase alloy in sub-micron

Wu, Ge; Zhang, Jiayong; Liu, Chang; Wang, Qing; Lu, Jian

doi:10.1016/j.scriptamat.2020.03.002

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Ductility of an ultrastrong glass-crystal nano-dual-phase alloy in sub-micron

Wu, G., Zhang, J., Liu, C., Wang, Q., & Lu, J. (2020). Ductility of an ultrastrong glass-crystal nano-dual-phase alloy in sub-micron. Scripta Materialia, 183, 17-21. doi:10.1016/j.scriptamat.2020.03.002.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0009-6BD3-1 Version Permalink: https://hdl.handle.net/21.11116/0000-0009-6F79-4

Genre: Journal Article

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Creators:
Wu, Ge^{1, 2}, Author
Zhang, Jiayong^{1, 3}, Author
Liu, Chang^{1, 2}, Author
Wang, Qing^{1, 4}, Author
Lu, Jian^{5, 6, 7, 8}, Author

Affiliations:
1High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society, ou_3010672
2Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China, ou_persistent22
3State Key Laboratory of Structural Analysis for Industrial Equipment, Department of Engineering Mechanics, Faculty of Vehicle Engineering and Mechanics, Dalian University of Technology, Dalian 116024, PR China, ou_persistent22
4Laboratory for Microstructures, Institute of Materials Science, Shanghai University, Shanghai 200072, China, ou_persistent22
5Centre 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
6Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, China, ou_persistent22
7Department of Mechanical and Biomedical Engineering, City University of Hong Kong, Hong Kong, China, ou_persistent22
8Hong Kong Branch of National Precious Metals Material Engineering Research Centre, City University of Hong Kong, Hong Kong, China, ou_persistent22

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Free keywords: Crystals; Ductility; Glass; Molecular dynamics; Nanocomposites; Nanostructures; Sputtering; Tensile strength; Transmission electron microscopy, Crystal alloys; Dual phase; In-situ tensile; Localized necking; Nano sized; Sub micron; Sub micros; True strain, Metallic glass

Abstract: We report an excellent tensile property of the Mg-based nano-dual-phase glass-crystal alloy in sub-micro size. It shows room temperature large ductility (>50 true strain, resulted from the localized necking deformation) with ultrahigh tensile strength (2.4 GPa), compared with 1.4 GPa strength and limited ductility of its metallic glass counterpart. To unraveling the underlying reasons, we have made transmission electron microscope (TEM) in-situ tensile investigation and molecular dynamic (MD) simulation for the materials, showing that homogenous plastic flow of nano-sized metallic glass phase activated by strain non-localization mechanism is responsible for the large ductility. © 2020

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Language(s): eng - English

Dates: Date issued: 2020-07-01

Publication Status: Issued

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Identifiers: DOI: 10.1016/j.scriptamat.2020.03.002

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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: 183 Sequence Number: - Start / End Page: 17 - 21 Identifier: ISSN: 1359-6462
CoNE: https://pure.mpg.de/cone/journals/resource/954926243506