Determination of the Load-Independent Hardness by Analyzing the Peak-Load-Dependence of the Unloading Slope in Nanoindentation

Jiang Hong Gong

doi:10.4028/www.scientific.net/KEM.280-283.1761

Paper Titles

Unified Model for Fracture of Brittle Solids
p.1739

Novel Estimation of Critical Frontal Process Zone of Ceramics by a Single-Edge V-Notched-Beam Technique
p.1745

A Tensile-Load Relaxation Test for Measuring the Stress Enhanced Corrosion Exponent of Ceramics with Open Porosity
p.1751

Description of Unloading Behavior of Berkovich Nanoindentation
p.1757

Determination of the Load-Independent Hardness by Analyzing the Peak-Load-Dependence of the Unloading Slope in Nanoindentation
p.1761

Properties of Cracking Resistance of Cemfiber Reinforced Concrete
p.1765

Investigation on Stress Fields in Lined-Ceramics of the Composite Pipes Fabricated by SHS Metallurgical Process
p.1771

Thermal Fatigue Life Prediction of Ni Base Alloy Ceramic Composite Coating
p.1775

The Toughening Action of Comprehensive Transformation on Mixed Mode II-III Ceramics
p.1779

HomeKey Engineering MaterialsKey Engineering Materials Vols. 280-283Determination of the Load-Independent Hardness by...

Determination of the Load-Independent Hardness by Analyzing the Peak-Load-Dependence of the Unloading Slope in Nanoindentation

Abstract:

By assuming that the test material has a load-independent nanohardness number, a linear relationship was predicted to exist between the reciprocal of the initial unloading stiffness, 1/SM, and the inverse square root of the peak load, (1/Pmax)0.5, and the load-independent hardness can be obtained directly from the slope of the 1/SM−(1/Pmax)0.5 straight line. This prediction was then verified by analyzing the experimental data obtained on soda-lime glass and a tetragonal ZrO2 polycrystalline. The indenter area function established based on the resultant load-independent hardness was found to deviate from the perfect Berkovich indenter and such a deviation can be attributed to the indenter deformation occurring during indentation as well as the indenter tip rounding.

You might also be interested in these eBooks

View Preview

Info:

Periodical:

Key Engineering Materials (Volumes 280-283)

Pages:

1761-1764

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.1761

Citation:

Cite this paper

Online since:

February 2007

Authors:

Jiang Hong Gong

Keywords:

Hardness, Nanoindentation

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

Citation:

References

[1] M.F. Doerner and W.D. Nix: J. Mater. Res. Vol. 1 (1986), p.601.

Google Scholar

[2] W.C. Oliver and G.M. Pharr: J. Mater. Res. Vol. 7 (1992), p.1564.

Google Scholar

[3] J.C. Hay, A. Bolshakov and G.M. Pharr: J. Mater. Res. Vol. 14 (1999), p.2296.

Google Scholar

[4] J.B. Quinn and G.D. Quinn: J. Mater. Sci. Vol. 32 (1997), p.4331.

Google Scholar

[5] J.H. Gong, J.Q. Wang and Z.D. Guan: J. Mater. Sci. Vol. 37 (2002), p.865.

Google Scholar

[6] T. Sawa and K. Tanaka: J. Mater. Res. Vol. 16 (2001), p.3084.

Google Scholar

[7] K. Herrmann, N.M. Jennett, W. Wegener, et al.: Thin Solid Films Vol. 377-378 (2000), p.394. 0 400 800 1200 1600 2000 0 3 6 9 12 Glass TZP A 0. 5 (µm) hc (nm) Fig. 4 The calculated projected contact area versus contact depth for the test materials.

DOI: 10.1016/s0040-6090(00)01367-5

Google Scholar