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Influences of stress on the measurement of mechanical properties using nanoindentation: Part I. Experimental studies in an aluminum alloy

Published online by Cambridge University Press:  31 January 2011

T. Y. Tsui ,
W. C. Oliver  and
G. M. Pharr
T. Y. Tsui
Affiliation:
Department of Materials Science, Rice University, 6100 Main Street, Houston, Texas 77005
W. C. Oliver
Affiliation:
Nano Instruments, Inc., 1001 Larson Drive, Oak Ridge, Tennessee 37830
G. M. Pharr
Affiliation:
Department of Materials Science, Rice University, 6100 Main Street, Houston, Texas 77005
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Abstract

The influence of applied stress on the measurement of hardness and elastic modulus using nanoindentation methods has been experimentally investigated using special specimens of aluminum alloy 8009 to which controlled stresses could be applied by bending. When analyzed according to standard methods, the nanoindentation data reveal changes in hardness with stress similar to those observed in conventional hardness tests. However, the same analysis shows that the elastic modulus changes with stress by as much as 10%, thus suggesting that the analysis procedure is somehow deficient. Comparison of the real indentation contact areas measured optically to those determined from the nanoindentation data shows that the apparent stress dependence of the modulus results from an underestimation of the contact area by the nanoindentation analysis procedures.

Type
Articles
Information
Journal of Materials Research , Volume 11 , Issue 3 , March 1996 , pp. 752 - 759
Copyright
Copyright © Materials Research Society 1996

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References

REFERENCES

1.Kokubo, S., Science Reports of the Tohoku Imperial University 21, 256 (1932).Google Scholar
2.Sines, G. and Carlson, R., ASTM Bulletin 180, 35 (1952).Google Scholar
3.Oppel, G. U., Exp. Mech. 21, 135 (1964).CrossRefGoogle Scholar
4.Vitovec, F. H., in Microindentation Techniques in Materials Science and Engineering, ASTM STP 889, edited by Blau, P.J. and Lawn, B.R. (American Society for Testing and Materials, Philadelphia, PA, 1986), p. 175.Google Scholar
5.Simes, T. R., Mellor, S. G., and Hills, D. A., Strain, J.Analysis 19, 135 (1984).Google Scholar
6.Blain, P. A., Metal. Progress, 99 (1957).Google Scholar
7.Blain, P. A., Sheet Metal Ind. 26, 135 (1949).Google Scholar
8.Almen, J. O., Product Engineering, 121 (1950).Google Scholar
9.LaFontaine, W. R., Paszkiet, C. A., Korhonen, M.A., and Che-Yu Li, J. Mater. Res. 6, 2084 (1991).CrossRefGoogle Scholar
10.Korhonen, M.A., LaFontaine, W.R., Paszkiet, C.A., Black, R. D., and Li, Che-Yu, in Thin Films: Stresses and Mechanical Properties II, edited by Doerner, M.F., Oliver, W.C., Pharr, G.M., and Brotzen, F.R. (Mater. Res. Soc. Symp. Proc. 188, Pittsburgh, PA, 1990), p. 159.Google Scholar
11.LaFontaine, W. R., Yost, B., and Li, Che-Yu, J. Mater. Res. 5, 776 (1990).CrossRefGoogle Scholar
12.Doerner, M.F., Gardner, D.S., and Nix, W.D., J. Mater. Res. 1, 845 (1986).CrossRefGoogle Scholar
13.Oliver, W. C. and Pharr, G.M., J. Mater. Res. 7, 1564 (1992).CrossRefGoogle Scholar
14.Pharr, G. M., Oliver, W. C., and Brotzen, F. R., J. Mater. Res. 7, 613 (1992).CrossRefGoogle Scholar
15.Pharr, G. M. and Oliver, W. C., MRS Bull. XVII, 28 (1992).CrossRefGoogle Scholar
16.Oliver, W. C., MRS Bull. XI, 15 (1986).CrossRefGoogle Scholar
17.Doerner, M.F. and Nix, W. D., J. Mater. Res. 1, 601 (1986).CrossRefGoogle Scholar
18.Sneddon, I. N., Int. J. Engng. Sci. 3, 47 (1965).Google Scholar
19.Bolshakov, A., Oliver, W. C., and Pharr, G.M., J. Mater. Res. 11, 760 (1996).CrossRefGoogle Scholar