Nanoindentation study on the creep characteristics of high-entropy alloy films: fcc versus bcc structures
文献类型：期刊论文
| 作者 | Ma Y ; Feng YH(冯义辉); Debela TT; Peng GJ; Zhang TH(张泰华)
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| 刊名 | INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
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| 出版日期 | 2016-02 |
| 卷号 | 54页码:395-400 |
| 通讯作者邮箱 | zhangth@zjut.edu.cn |
| 关键词 | High-entropy alloys Nanoindentation Creep Strain rate sensitivity Activation volume |
| ISSN号 | 0263-4368 |
| 产权排序 | [Ma, Y.; Peng, G. J.; Zhang, T. H.] Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China; [Feng, Y. H.] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China; [Debela, Tekalign T.] Northwestern Polytech Univ, Sch Mat Sci & Engn, Xian 710072, Peoples R China |
| 通讯作者 | Zhang, TH (reprint author), Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China. |
| 中文摘要 | 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. |
| 分类号 | 一类 |
| 类目[WOS] | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| 研究领域[WOS] | Materials Science ; Metallurgy & Metallurgical Engineering |
| 关键词[WOS] | STRAIN-RATE SENSITIVITY ; PRINCIPAL ELEMENTS ; ACTIVATION VOLUME ; METALLIC GLASSES ; PLASTIC-FLOW ; MICROSTRUCTURE ; NANOCRYSTALLINE ; RESISTIVITY ; POLYMERS ; BEHAVIOR |
| 收录类别 | SCI ; EI |
| 原文出处 | http://dx.doi.org/10.1016/j.ijrmhm.2015.08.010 |
| 语种 | 英语 |
| WOS记录号 | WOS:000366231600051 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/58361]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 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. |
| APA | Ma Y,冯义辉,Debela TT,Peng GJ,&张泰华.(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. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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