Estimation of hardness by nanoindentation of rough surfaces

被引:69
作者
Bobji, MS [1 ]
Biswas, SK [1 ]
机构
[1] Indian Inst Sci, Dept Mech Engn, Bangalore 560012, Karnataka, India
关键词
D O I
10.1557/JMR.1998.0438
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The roughness of a surface influences the surface mechanical properties, estimated using nanoindentation data. Assuming a relation between the penetration depth normalized with respect to a roughness scale parameter, and the effective radius encountered by the indenter, a first order model of roughness dependency of hardness is proposed. The practical usefulness of this model is verified by the numerical simulation of nanoindentation on a fractal surface. As the roughness of a surface is increased, the hardness measured at depths comparable with the roughness scale deviates increasingly from the actual hardness. Given the constants related to indenter geometry, the present work provides a rationale and a method for deconvoluting the effect of roughness in arriving at real hardness characteristics of the near surface region of a material.
引用
收藏
页码:3227 / 3233
页数:7
相关论文
共 19 条
[1]   ELASTIC DEFORMATION AND THE LAWS OF FRICTION [J].
ARCHARD, JF .
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1957, 243 (1233) :190-205
[2]   ON THE WEIERSTRASS-MANDELBROT FRACTAL FUNCTION [J].
BERRY, MV ;
LEWIS, ZV .
PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL AND PHYSICAL SCIENCES, 1980, 370 (1743) :459-484
[3]  
BHUSAN B, 1994, P I MECH ENG J-J ENG, V1, P17
[4]   Hardness estimated from the indentation of a spherical body. Some implications for nanoindentation test results [J].
Bobji, M. S. ;
Fahim, M. ;
Biswas, S. K. .
TRIBOLOGY LETTERS, 1996, 2 (04) :381-391
[5]   Determination and study of the strength of the blister field generated by conical indentation [J].
Bobji, MS ;
Biswas, SK .
PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1996, 73 (02) :399-413
[6]   A method for interpreting the data from depth-sensing indentation instruments [J].
Doerner, M. F. ;
Nix, W. D. .
JOURNAL OF MATERIALS RESEARCH, 1986, 1 (04) :601-609
[7]   APPLICATION OF SPHERICAL INDENTATION MECHANICS TO REVERSIBLE AND IRREVERSIBLE CONTACT BETWEEN ROUGH SURFACES [J].
FRANCIS, HA .
WEAR, 1977, 45 (02) :221-269
[8]   THE INJECTION OF PLASTICITY BY MILLINEWTON CONTACTS [J].
GERBERICH, WW ;
VENKATARAMAN, SK ;
HUANG, H ;
HARVEY, SE ;
KOHLSTEDT, DL .
ACTA METALLURGICA ET MATERIALIA, 1995, 43 (04) :1569-1576
[9]  
Johnson K. L., 1987, CONTACT MECH
[10]  
LOUBET JL, 1986, ASTM STP, V889, P72, DOI DOI 10.1520/JTE20130245