Substantially enhanced plasticity of bulk metallic glasses by densifying local atomic packing

Yuan Wu, Di Cao, Yilin Yao, Guosheng Zhang, Jinyue Wang, Leqing Liu, Fengshou Li, Huiyang Fan, Xiongjun Liu, Hui Wang, Xianzhen Wang, Huihui Zhu, Suihe Jiang, Paraskevas Kontis, Dierk Raabe, Baptiste Gault and Zhaoping Lu ()
Additional contact information
Yuan Wu: University of Science and Technology Beijing
Di Cao: University of Science and Technology Beijing
Yilin Yao: University of Science and Technology Beijing
Guosheng Zhang: University of Science and Technology Beijing
Jinyue Wang: University of Science and Technology Beijing
Leqing Liu: University of Science and Technology Beijing
Fengshou Li: University of Science and Technology Beijing
Huiyang Fan: University of Science and Technology Beijing
Xiongjun Liu: University of Science and Technology Beijing
Hui Wang: University of Science and Technology Beijing
Xianzhen Wang: University of Science and Technology Beijing
Huihui Zhu: University of Science and Technology Beijing
Suihe Jiang: University of Science and Technology Beijing
Paraskevas Kontis: Max-Planck-Institut für Eisenforschung GmbH, Department of Microstructure Physics and Alloy Design
Dierk Raabe: Max-Planck-Institut für Eisenforschung GmbH, Department of Microstructure Physics and Alloy Design
Baptiste Gault: Max-Planck-Institut für Eisenforschung GmbH, Department of Microstructure Physics and Alloy Design
Zhaoping Lu: University of Science and Technology Beijing

Nature Communications, 2021, vol. 12, issue 1, 1-9

Abstract: Abstract Introducing regions of looser atomic packing in bulk metallic glasses (BMGs) was reported to facilitate plastic deformation, rendering BMGs more ductile at room temperature. Here, we present a different alloy design approach, namely, doping the nonmetallic elements to form densely packed motifs. The enhanced structural fluctuations in Ti-, Zr- and Cu-based BMG systems leads to improved strength and renders these solutes’ atomic neighborhoods more prone to plastic deformation at an increased critical stress. As a result, we simultaneously increased the compressive plasticity (from ∼8% to unfractured), strength (from ∼1725 to 1925 MPa) and toughness (from 87 ± 10 to 165 ± 15 MPa√m), as exemplarily demonstrated for the Zr20Cu20Hf20Ti20Ni20 BMG. Our study advances the understanding of the atomic-scale origin of structure-property relationships in amorphous solids and provides a new strategy for ductilizing BMG without sacrificing strength.

Date: 2021
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DOI: 10.1038/s41467-021-26858-9

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