IMECH-IR  > 非线性力学国家重点实验室
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.
Source PublicationINTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
2016-02
Volume54Pages:395-400
ISSN0263-4368
AbstractUsing 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.
KeywordHigh-entropy Alloys Nanoindentation Creep Strain Rate Sensitivity Activation Volume
DOI10.1016/j.ijrmhm.2015.08.010
URL查看原文
Indexed BySCI ; EI
Language英语
WOS IDWOS:000366231600051
WOS KeywordSTRAIN-RATE SENSITIVITY ; PRINCIPAL ELEMENTS ; ACTIVATION VOLUME ; METALLIC GLASSES ; PLASTIC-FLOW ; MICROSTRUCTURE ; NANOCRYSTALLINE ; RESISTIVITY ; POLYMERS ; BEHAVIOR
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
Funding OrganizationThe 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.
DepartmentLNM实验平台
Classification一类
RankingFalse
Citation statistics
Cited Times:26[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/58361
Collection非线性力学国家重点实验室
Corresponding AuthorZhang, TH (reprint author), Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China.
Recommended Citation
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,&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.
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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