Grain size effect on the hardness of nanocrystal measured by the nanosize indenter

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	Grain size effect on the hardness of nanocrystal measured by the nanosize indenter
	Liu XM(刘小明); Yuan FP(袁福平); Wei YG(魏悦广); Liu, XM (reprint author), Chinese Acad Sci, LNM, Inst Mech, Beijing 100190, Peoples R China.
发表期刊	APPLIED SURFACE SCIENCE
	2013-08-15
卷号	279 页码:159-166
ISSN	0169-4332
摘要	The hardness measured by the nanosize indenter under atomic indentation is examined for the cases of nanocrystalline nickel by means of molecular dynamics (MD) simulations. The grain size effect observed is different from the one by uniform deformation or deep indentation. The results show that hardness can only show inverse Hall–Petch (H-P) effect, no H-P effect is observed with the grain size up to 40 nm. Grain boundary (GB) absorption of the localized strain is the main deformation mechanism when the indenter size and the depth both come to nano size. The area of plastic zone generated beneath the tip is strongly dependent on the GB density, sample with small grain size results in larger plastic area, which leads to the softer response of hardness.
关键词	Size Effect Nanocrystal Hardness Molecular Simulation
学科领域	固体力学
URL	查看原文
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000320766500025
项目资助者	National Basic Research Program of China [2012CB937500]; National Natural Science Foundation of China [11142005, 11202214, 10772096, 11021262, 10932011, 91116003, 11002151, 11222224]
课题组名称	LNM新型材料及结构的多尺度力学
论文分区	一类
引用统计	被引频次：79[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47354
专题	非线性力学国家重点实验室
通讯作者	Liu, XM (reprint author), Chinese Acad Sci, LNM, Inst Mech, Beijing 100190, Peoples R China.
推荐引用方式 GB/T 7714	Liu XM,Yuan FP,Wei YG,et al. Grain size effect on the hardness of nanocrystal measured by the nanosize indenter[J]. APPLIED SURFACE SCIENCE,2013,279:159-166.
APA	刘小明,袁福平,魏悦广,&Liu, XM .(2013).Grain size effect on the hardness of nanocrystal measured by the nanosize indenter.APPLIED SURFACE SCIENCE,279,159-166.
MLA	刘小明,et al."Grain size effect on the hardness of nanocrystal measured by the nanosize indenter".APPLIED SURFACE SCIENCE 279(2013):159-166.

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