Indentation size effect in metallic materials:: Correcting for the size of the plastic zone

被引：341

作者：

Durst, K ^{[1
]}

Backes, B ^{[1
]}

Göken, M ^{[1
]}

机构：

[1] Univ Erlangen Nurnberg, Dept Mat Sci & Engn, D-91058 Erlangen, Germany

来源：

SCRIPTA MATERIALIA | 2005年 / 52卷 / 11期

关键词：

nanoindentation; hardness; ultrafine-grained microstructure; finite element analysis;

D O I：

10.1016/j.scriptamat.2005.02.009

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A correction method is proposed for the Nix/Gao model of the indentation size effect, assuming that the geometrically necessary dislocations are stored within the plastically deformed volume, whose radius is given, depending on the material, by a factor times the contact radius. Using this volume for calculating the depth dependence of hardness and the characteristic indentation length scale h(*) a good agreement with experiments is found for many metallic materials. (c) 2005 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：1093 / 1097

页数：5

共 10 条

[1] Crystallographic aspects of geometrically-necessary and statistically-stored dislocation density [J].

Arsenlis, A ;

Parks, DM .

ACTA MATERIALIA, 1999, 47 (05) :1597-1611

[2]

BULL SJ, 2003, Z METALLKD, V7, P94

[3]

DURST K, IN PRESS MRS 2004 FA

[4]

FENG G, IN PRESS SCRIP MAT

[5]

Johnson KL., 1985, CONTACT MECH

[6] Depth dependence of hardness in copper single crystals measured by nanoindentation [J].

Liu, Y ;

Ngan, AHW .

SCRIPTA MATERIALIA, 2001, 44 (02) :237-241

[7] Determination of indenter tip geometry and indentation contact area for depth-sensing indentation experiments [J].

McElhaney, KW ;

Vlassak, JJ ;

Nix, WD .

JOURNAL OF MATERIALS RESEARCH, 1998, 13 (05) :1300-1306

[8] Indentation size effects in crystalline materials: A law for strain gradient plasticity [J].

Nix, WD ;

Gao, HJ .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 1998, 46 (03) :411-425

[9] The correlation of the indentation size effect measured with indenters of various shapes [J].

Swadener, JG ;

George, EP ;

Pharr, GM .

JOURNAL OF THE MECHANICS AND PHYSICS OF SOLIDS, 2002, 50 (04) :681-694

[10]

Tabor D, 1951, HARDNESS METALS, V200

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