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Journal Article

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

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Wu,  Ge
High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China;

Zhang,  Jiayong
High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
State 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;

/persons/resource/persons249877

Liu,  Chang
High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
Department of Mechanical Engineering, City University of Hong Kong, Hong Kong, China;

Wang,  Qing
High-Entropy Alloys, Microstructure Physics and Alloy Design, Max-Planck-Institut für Eisenforschung GmbH, Max Planck Society;
Laboratory for Microstructures, Institute of Materials Science, Shanghai University, Shanghai 200072, China;

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Citation

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.


Cite as: https://hdl.handle.net/21.11116/0000-0009-6BD3-1
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