材料科学技术(英文版)2022，Vol.102Issue(7) ：36-45.

Manipulating internal flow units toward favorable plasticity in Zr-based bulk-metallic glasses by hydrogenation

Fuyu Dong Yuexin Chu Mengyuan He Yue Zhang Weidong Li Peter K.Liaw Binbin Wang Liangshun Luo Yanqing Su Robert O.Ritchie Xiaoguang Yuan
材料科学技术(英文版)2022，Vol.102Issue(7) ：36-45.
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Manipulating internal flow units toward favorable plasticity in Zr-based bulk-metallic glasses by hydrogenation

Fuyu Dong 1Yuexin Chu 1Mengyuan He 2Yue Zhang 1Weidong Li 3Peter K.Liaw 3Binbin Wang 4Liangshun Luo 4Yanqing Su 4Robert O.Ritchie 5Xiaoguang Yuan1
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作者信息

  • 1. School of Materials Science and Engineering,Shenyang University of Technology,Shenyang,China
  • 2. School of Materials Science and Engineering,Shenyang University of Technology,Shenyang,China;School of Materials Science and Engineering,Northeastern University,Shenyang,China
  • 3. Department of Materials Science and Engineering,The University of Tennessee,Knoxville,TN,USA
  • 4. School of Materials Science and Engineering,Harbin Institute of Technology,Harbin,China
  • 5. Department of Materials Science and Engineering,University of California,Berkeley,CA,94720,USA
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Abstract

This work intends to manipulate the internal flow units in Zr55Cu30Ni5Al10 bulk-metallic glasses(BMGs)through plasma-assisted hydrogenation to generate a positive microalloying effect on plasticity.Based on the cooperative shear model theory,serration-flow statistics during nanoindentation loading and creep tests during the holding stage were used to analyze the influence of hydrogen on the behavior of flow units in BMGs.Experimental observations showed that the hydrogen in the Zr55Cu30Ni5Al10 BMGs caused mechanical softening,plasticity improvement,and structural relaxation.Analysis also showed that the average volume,size,and activation energy of internal flow units in the BMGs all increased as a result of the increase in the hydrogen content,The hydrogenation in the BMGs was found to lead to a prolifera-tion of shear bands,which promoted plasticity.The aggregation of these internal flow units reduced the stress required for plastic deformation through shear bands,ultimately causing softening and structural relaxation.

Key words

Bulk-metallic glass/Plasma-assisted hydrogenation/Nanoindentation/Internal flow unit/Serrations/Nano-scale creep

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基金项目

National Natural Sci-ence Foundation of China(51401129)

Natural Science Foundation of Liaoning Province(2019-ZD-0216)

Natural Science Foundation of Liaoning Province(20180510056)

Foundation of Liaoning Province Education Administration(LQGD2019001)

National Science Foundation(DMR-1611180)

National Science Foundation(1809640)

USDepartment of Energy,Office of Science,Office of Basic Energy Sciences,Ma-terials Sciences and Engineering Division(DE-AC02-05-CH11231)

出版年

2022
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量86
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