| Nanoindentation investigation on the creep mechanism in metallic glassy films |
| Ma Y ; Peng GJ; Feng YH(冯义辉); Zhang TH(张泰华); Zhang, TH (reprint author), Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China.
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| 发表期刊 | MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
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| 2016-01-10
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| 卷号 | 651页码:548-555 |
| ISSN | 0921-5093
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| 摘要 | Using the magnetron sputtering technique, two metallic glassy films namely Cu44.3Zr45.1Al10.6 and Cu44.2Zr43Al11.3Ti1.5 were prepared by alloy targets. The minor Ti addition effectively induces excess free volume. Upon spherical nanoindentation, the creep behaviors of both films were studied at various peak loads. As the increase of peak load, the creep deformations became more severely in both samples. Interestingly, Cu-Zr-Al-Ti film crept stronger than Cu-Zr-Al at small-load holdings (nominal elastic regimes), whereas it is opposite at high-load holdings (plastic regimes). The creep characteristic could be intrinsically related to the scale variation of the shear transformation zone (STZ) with Ti addition. Statistical analysis was employed to estimate the STZ volume, which increased by 60% with Ti addition in the Cu-Zr-Al film. The finite element modeling indicated that STZs would be activated even at the minimum load we adopted. Higher activation energy of larger STZs in Cu-Zr-Al-Ti enables less flow units, which offsets the creep enhancement by the excess free volume with Ti addition. The deeper the pressed depth of the indenter, the more contribution of the STZ operation on creep deformation. In addition, experimental observation on the creep flow rates implies that STZ could be the dominating mechanism at the steady-state creep. This study reveals that STZ volume could also be important to the time-dependent plastic deformation in metallic glass, besides as a key parameter for instantaneous plasticity. (C) 2015 Elsevier B.V. All rights reserved. |
| 关键词 | Metallic Glass
Nanoindentation
Creep
Free Volume
Shear Transformation Zone
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| DOI | 10.1016/j.msea.2015.11.014
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| URL | 查看原文
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| 收录类别 | SCI
; EI
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| 语种 | 英语
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| WOS记录号 | WOS:000367486800065
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| 关键词[WOS] | SHEAR TRANSFORMATION ZONES
; VISCOPLASTIC DEFORMATION
; PLASTIC-DEFORMATION
; INDENTATION CREEP
; AMORPHOUS-ALLOYS
; SIZE
; FLOW
; DYNAMICS
; BEHAVIOR
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| WOS研究方向 | Science & Technology - Other Topics
; Materials Science
; Metallurgy & Metallurgical Engineering
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| WOS类目 | Nanoscience & Nanotechnology
; Materials Science, Multidisciplinary
; Metallurgy & Metallurgical Engineering
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| 项目资助者 | The support from the National Natural Science Foundation of China (Grant nos. 11025212, 11272318, 11402233, 11302231 and 11502235) and Zhejiang Provincial Natural Science Foundation of China (Grant no. LQ15A020004) are gratefully acknowledged.
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| 课题组名称 | LNM实验平台
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| 论文分区 | 一类
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| 力学所作者排名 | False
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| 引用统计 |
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| 文献类型 | 期刊论文
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| 条目标识符 | http://dspace.imech.ac.cn/handle/311007/58644
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| 专题 | 非线性力学国家重点实验室
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| 通讯作者 | Zhang, TH (reprint author), Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China. |
推荐引用方式
GB/T 7714 |
Ma Y,Peng GJ,Feng YH,et al. Nanoindentation investigation on the creep mechanism in metallic glassy films[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2016,651:548-555.
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| APA |
Ma Y,Peng GJ,冯义辉,张泰华,&Zhang, TH .(2016).Nanoindentation investigation on the creep mechanism in metallic glassy films.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,651,548-555.
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| MLA |
Ma Y,et al."Nanoindentation investigation on the creep mechanism in metallic glassy films".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 651(2016):548-555.
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