A different type of indentation size effect

被引：239

作者：

Shim, S. ^{[1
,2
]}

Bei, H. ^{[1
]}

George, E. P. ^{[1
,2
]}

Pharr, G. M. ^{[1
,2
]}

机构：

[1] Oak Ridge Natl Lab, Mat Sci & Technol Div, Oak Ridge, TN 37831 USA

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

来源：

SCRIPTA MATERIALIA | 2008年 / 59卷 / 10期

关键词：

Nanoindentation; Nickel; Yield phenomena; Elastic behavior; Pop-in;

D O I：

10.1016/j.scriptamat.2008.07.026

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Pop-in during nanoindentation, which indicates the onset of dislocation plasticity, was systematically investigated in annealed and pre-strained single crystals of nickel using spherical indenters with different tip radii. As the indenter radius and pre-strain decrease, the maximum shear stresses determined from the pop-in loads increase. This represents a new type of indentation size effect (ISE), based not on the measured hardness as in conventional ISE, but on the stress needed to initiate dislocation plasticity. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1095 / 1098

页数：4

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