Size effects in micro- and nanoscale indentation

被引：214

作者：

Manika, Eze ^{[1
]}

Maniks, Janis ^{[1
]}

机构：

[1] Latvian State Univ, Inst Solid State Phys, LV-1063 Riga, Latvia

来源：

ACTA MATERIALIA | 2006年 / 54卷 / 08期

关键词：

indentation size effects; surface hardness; single crystals;

D O I：

10.1016/j.actamat.2005.12.031

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The indentation size effect (ISE) has been studied in single crystals, polycrystals and amorphous solids using the Vickers microhardness test. The ISE is clearly present in single crystals but is absent in fine-grained polycrystals. A size-dependent hardness for amorphous solids is observed only in the sub-micrometre surface layer. The behaviour of the ISE in single crystals for micro- and nanoindentation is compared. Estimates of the surface hardness are made by the extrapolation of the experimental hardness-indentation depth curves. The extrapolated hardness in the surface region reaches values corresponding to the theoretical shear strength. The results confirm the multifarious nature of the ISE contributed by the surface effect, strain gradient work hardening and non-dislocation mechanisms of deformation. (c) 2006 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：2049 / 2056

页数：8

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