| Nanoindentation study on the creep characteristics of high-entropy alloy films: fcc versus bcc structures |
| Ma Y ; Feng YH(冯义辉); Debela TT; Peng GJ; 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 | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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| 2016-02
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| 卷号 | 54页码:395-400 |
| ISSN | 0263-4368
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| 摘要 | Using the magnetron sputtering technique, two typical high-entropy alloy (HEA) films namely CoCrFeNiCu (Al-0) with a face-centered cubic (fcc) structure and CoCrFeNiCuAl2.5 (Al-2.5) with a body-centered cubic (bcc) structure were prepared by alloy targets. The as-deposited HEA films have a columnar-growth mode and nanocrystalline grains. The creep behaviors of both HEA films were systematically investigated by nanoindentation with a Berkovich indenter. The bcc Al-2.5 exhibited a stronger creep resistance than the fcc Al-0. In addition, with the increase of holding load and/or loading rate, the creep deformation was significantly enhanced in the fcc Al-0. Interestingly, it was almost history-independent in the bcc Al-2.5. The creep characteristics of HEA films could be related to the distinct lattice structures, which apparently affect the kinetics of plastic deformation. The strain rate sensitivity (SRS) and activation volume of the dislocation nucleation were carefully estimated for both HEA films. In view of the large differences of activation volumes between Al-0 and Al-2.5, we present discussions to explain the observed creep characteristics in HEA films. (C) 2015 Published by Elsevier Ltd. |
| 关键词 | High-entropy Alloys
Nanoindentation
Creep
Strain Rate Sensitivity
Activation Volume
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| DOI | 10.1016/j.ijrmhm.2015.08.010
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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:000366231600051
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| 关键词[WOS] | STRAIN-RATE SENSITIVITY
; PRINCIPAL ELEMENTS
; ACTIVATION VOLUME
; METALLIC GLASSES
; PLASTIC-FLOW
; MICROSTRUCTURE
; NANOCRYSTALLINE
; RESISTIVITY
; POLYMERS
; BEHAVIOR
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| WOS研究方向 | Materials Science
; Metallurgy & Metallurgical Engineering
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| WOS类目 | 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, 11302231, 11402233 and 11502235), 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/311007/58361
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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,Feng YH,Debela TT,et al. Nanoindentation study on the creep characteristics of high-entropy alloy films: fcc versus bcc structures[J]. INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,2016,54:395-400.
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| APA |
Ma Y,冯义辉,Debela TT,Peng GJ,张泰华,&Zhang, TH .(2016).Nanoindentation study on the creep characteristics of high-entropy alloy films: fcc versus bcc structures.INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS,54,395-400.
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| MLA |
Ma Y,et al."Nanoindentation study on the creep characteristics of high-entropy alloy films: fcc versus bcc structures".INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS 54(2016):395-400.
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