Size Dependent Nanoindentation of a Soft Film on a Hard Substrate

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	Size Dependent Nanoindentation of a Soft Film on a Hard Substrate
	Chen SH(陈少华); Liu L(刘磊); Wang ZQ(王自强)
刊名	Acta Materialia
	2004
通讯作者邮箱	chenshaohua72@hotmail.com
卷号	52 期号:5 页码:1089-1095
ISSN号	1359-6454
通讯作者	Chen, SH (reprint author), Chinese Acad Sci, Inst Mech, LNM, 15 Beisihuan Xilu, Beijing 100080, Peoples R China.
中文摘要	Nanoindentation experiments on Al/glass systems show that, as the indentation depth increases, the hardness decreases during a shallow indentation, and increases when the indenter tip approaches the film–substrate interface. We associate the rise in hardness during two stages with the strong strain gradient effects, the first stage is related with the small scale effects and the second stage with the strain gradient between the indenter and the hard substrate. Using the strain gradient theory proposed by Chen and Wang and the classical plasticity theory, the observed nanoindentation behavior is modeled and analyzed by means of the finite element method, and it is found that the classical plasticity cannot explain the experiment results but the strain gradient theory can describe the experiment data at both shallow and deep indentation depths very well. The results prove that both the strain gradient effects and substrate effects exist in the nanoindentation of the film–substrate system.
学科主题	力学
类目[WOS]	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
研究领域[WOS]	Materials Science ; Metallurgy & Metallurgical Engineering
关键词[WOS]	STRAIN GRADIENT PLASTICITY ; SENSING INDENTATION EXPERIMENTS ; MECHANICAL-PROPERTIES ; MATRIX COMPOSITES ; THIN-FILMS ; CRACK ; TESTS
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000220236100001
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/17422]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Chen SH,Liu L,Wang ZQ. Size Dependent Nanoindentation of a Soft Film on a Hard Substrate[J]. Acta Materialia,2004,52(5):1089-1095.
APA	陈少华,刘磊,&王自强.(2004).Size Dependent Nanoindentation of a Soft Film on a Hard Substrate.Acta Materialia,52(5),1089-1095.
MLA	陈少华,et al."Size Dependent Nanoindentation of a Soft Film on a Hard Substrate".Acta Materialia 52.5(2004):1089-1095.