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 Publication | APPLIED SURFACE SCIENCE |
2013-08-15 | |
Volume | 279Pages:159-166 |
ISSN | 0169-4332 |
Abstract | 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. |
Keyword | Size Effect Nanocrystal Hardness Molecular Simulation |
Subject Area | 固体力学 |
URL | 查看原文 |
Indexed By | SCI ; EI |
Language | 英语 |
WOS ID | WOS:000320766500025 |
Funding Organization | National Basic Research Program of China [2012CB937500]; National Natural Science Foundation of China [11142005, 11202214, 10772096, 11021262, 10932011, 91116003, 11002151, 11222224] |
Department | LNM新型材料及结构的多尺度力学 |
Classification | 一类 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://dspace.imech.ac.cn/handle/311007/47354 |
Collection | 非线性力学国家重点实验室 |
Corresponding Author | Liu, 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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