Theoretical and experimental researches of size effect in micro-indentation test

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	Theoretical and experimental researches of size effect in micro-indentation test
	Wei YG(魏悦广); Wang XZ(王学峥); Wu XL(武晓雷); Bai YL(白以龙)
刊名	Science in China Series A-Mathematics Physics Astronomy
	2001
卷号	44 期号:1 页码:74-82
ISSN号	1006-9283
通讯作者	Wei, YG (reprint author), Chinese Acad Sci, Inst Mech, LNM, Beijing 100080, Peoples R China.
中文摘要	Micro-indentation tests at scales on the order of sub-micron have shown that the measured hardness increases strongly with the indent depth or indent size decreasing, which is frequently referred to as the size effect. However, the trend is at odds with the size-independence implied by conventional elastic-plastic theory. In this paper, strain gradient plasticity theory is used to model the size effect for materials undergoing the micro-indenting, Meanwhile, the micro-indentation experiments for single crystal copper and single crystal aluminum are carried out. By the comparison of the theoretical predictions with experimental measurements, the micro-scale parameter of strain gradient plasticity theory is predicted, which is fallen into the region of 0.8-1.5 micron for the conventional metals such as copper (Cu), aluminum (Al) and silver (Ag). Moreover, the phenomena of the pile-up and sink-in near micro-indent boundary are investigated and analyzed in detail.
学科主题	力学
类目[WOS]	Mathematics, Applied ; Mathematics
研究领域[WOS]	Mathematics
关键词[WOS]	STRAIN GRADIENT PLASTICITY ; CRACK-TIP FIELDS ; SINGLE-CRYSTALS ; HARDNESS ; SOLIDS ; WORK
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000167130100010
公开日期	2007-06-15
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/15681]
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	Wei YG,Wang XZ,Wu XL,et al. Theoretical and experimental researches of size effect in micro-indentation test[J]. Science in China Series A-Mathematics Physics Astronomy,2001,44(1):74-82.
APA	魏悦广,王学峥,武晓雷,&白以龙.(2001).Theoretical and experimental researches of size effect in micro-indentation test.Science in China Series A-Mathematics Physics Astronomy,44(1),74-82.
MLA	魏悦广,et al."Theoretical and experimental researches of size effect in micro-indentation test".Science in China Series A-Mathematics Physics Astronomy 44.1(2001):74-82.