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

被引：87

作者：

Wu, Yuan ^{[1
]}

Cao, Di ^{[1
]}

Yao, Yilin ^{[1
]}

Zhang, Guosheng ^{[1
]}

Wang, Jinyue ^{[1
]}

Liu, Leqing ^{[1
]}

Li, Fengshou ^{[1
]}

Fan, Huiyang ^{[1
]}

Liu, Xiongjun ^{[1
]}

Wang, Hui ^{[1
]}

Wang, Xianzhen ^{[2
]}

Zhu, Huihui ^{[1
]}

Jiang, Suihe ^{[1
]}

Kontis, Paraskevas ^{[3
]}

Raabe, Dierk ^{[3
]}

Gault, Baptiste ^{[3
,4
]}

Lu, Zhaoping ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Beijing Adv Innovat Ctr Mat Genome Engn, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China

[3] Max Planck Inst Eisenforsch GmbH, Dept Microstruct Phys & Alloy Design, Max Planck Str 1, D-40237 Dusseldorf, Germany

[4] Imperial Coll London, Dept Mat, London SW7 2AZ, England

来源：

NATURE COMMUNICATIONS | 2021年 / 12卷 / 01期

基金：

中国国家自然科学基金;

关键词：

FORMING ABILITY; SECONDARY RELAXATION; MECHANICAL-BEHAVIOR; ZR-CU; DEFORMATION; OXYGEN; STRENGTH; CRYSTALLIZATION; LOCALIZATION; STABILITY;

D O I：

10.1038/s41467-021-26858-9

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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 similar to 8% to unfractured), strength (from similar to 1725 to 1925 MPa) and toughness (from 87 +/- 10 to 165 +/- 15 MPa root 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. Common wisdom to improve ductility of bulk metallic glasses (BMGs) is to introduce local loose packing regions at the expense of strength. Here the authors enhance structural fluctuations of BMGs by introducing dense local packing regions, resulting in simultaneous increase of ductility and strength.

引用

页数：9

共 55 条

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