A critical examination of the fundamental relations used in the analysis of nanoindentation data
- IBM Research, T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598 (United States)
- Baker Hughes Inteq, P.O. Box 670968, Houston, Texas 77267-0968 (United States)
- Department of Materials Science and Engineering, The University of Tennessee, 434 Dougherty Engineering Building, Knoxville, Tennessee 37996-2200 and Oak Ridge National Laboratory, Metals and Ceramics Division, P.O. Box 2008, Oak Ridge, Tennessee 37831-6116 (United States)
Methods for analyzing nanoindentation load-displacement data to determine hardness and elastic modulus are based on analytical solutions for the indentation of an elastic half-space by rigid axisymmetric indenters. Careful examination of Sneddon{close_quote}s solution for indentation by a rigid cone reveals several largely ignored features that have important implications for nanoindentation property measurement. Finite element and analytical results are presented that show corrections to Sneddon{close_quote}s equations are needed if accurate results are to be obtained. Without the corrections, the equations underestimate the load and contact stiffness in a manner that leads to errors in the measured hardness and modulus, with the magnitudes of the errors depending on the angle of the indenter and Poisson{close_quote}s ratio of the half-space. First order corrections are derived, and general implications for the interpretation of nanoindentation data are discussed. {copyright} {ital 1999 Materials Research Society.}
- Research Organization:
- Oak Ridge Institute of Science and Education
- DOE Contract Number:
- AC05-76OR00033; AC05-96OR22464
- OSTI ID:
- 351854
- Journal Information:
- Journal of Materials Research, Vol. 14, Issue 6; Other Information: PBD: Jun 1999
- Country of Publication:
- United States
- Language:
- English
Similar Records
An explanation for the shape of nanoindentation unloading curves based on finite element simulation
Finite element studies of the influence of pile-up on the analysis of nanoindentation data