IMECH-IR  > 非线性力学国家重点实验室
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.
Source PublicationAPPLIED SURFACE SCIENCE
2013-08-15
Volume279Pages:159-166
ISSN0169-4332
AbstractThe 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.
KeywordSize Effect Nanocrystal Hardness Molecular Simulation
Subject Area固体力学
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Indexed BySCI ; EI
Language英语
WOS IDWOS:000320766500025
Funding OrganizationNational Basic Research Program of China [2012CB937500]; National Natural Science Foundation of China [11142005, 11202214, 10772096, 11021262, 10932011, 91116003, 11002151, 11222224]
DepartmentLNM新型材料及结构的多尺度力学
Classification一类
Citation statistics
Cited Times:54[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47354
Collection非线性力学国家重点实验室
Corresponding AuthorLiu, XM (reprint author), Chinese Acad Sci, LNM, Inst Mech, Beijing 100190, Peoples R China.
Recommended Citation
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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