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Spherical Load Indentation in Submicron NiTiCu Shape Memory Thin Films

Published online by Cambridge University Press:  01 February 2011

R. Hassdorf ,
J. Feydt ,
S. Thienhaus ,
L. Buforn ,
N. Conté ,
O. Pykhteev ,
M. Kružík ,
N. Botkin  and
M. Moske
R. Hassdorf
Affiliation:
Center of Advanced European Studies and Research (caesar), D-53175 Bonn, Germany
J. Feydt
Affiliation:
Center of Advanced European Studies and Research (caesar), D-53175 Bonn, Germany
S. Thienhaus
Affiliation:
Center of Advanced European Studies and Research (caesar), D-53175 Bonn, Germany
L. Buforn
Affiliation:
CSM Instruments SA, CH-2034 Peseux, Switzerland
N. Conté
Affiliation:
CSM Instruments SA, CH-2034 Peseux, Switzerland
O. Pykhteev
Affiliation:
Center of Advanced European Studies and Research (caesar), D-53175 Bonn, Germany
M. Kružík
Affiliation:
Center of Advanced European Studies and Research (caesar), D-53175 Bonn, Germany Institute of Information Theory and Automation, Academy of Sciences, CZ-182 08 Prague, Czech Republic
N. Botkin
Affiliation:
Center of Advanced European Studies and Research (caesar), D-53175 Bonn, Germany
M. Moske
Affiliation:
Center of Advanced European Studies and Research (caesar), D-53175 Bonn, Germany
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Abstract

Nanoindentation with spherical tipped indenters provides a powerful technique to explore surface and thin film mechanical properties through the application of Hertzian contact mechanics. The full range of mechanical response can be obtained from elastic, through the yield point, to permanent deformation. In this study spherical indentation has been used for probing MBE-grown NiTiCu alloy thin films into superelasticity or stress-induced martensitic transformation. By this way, obstacles typically occurring related to the fabrication of freestanding films (film thickness < 1 μm) are avoided. The indentation measurements were performed starting from the parent austenite state. Notably, for loads as small as 0.5 mN, deformation appears to be completely reversible. As loading is increased (up to 5 mN) the indent becomes irreversible following local plastic deformation within the tip-specimen contact area. Using finite-element simulations the indentation data were converted into a stress-strain diagram aimed at simulating uniaxial tension load. Therefrom, the superelastic strain is estimated to be around 3%.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 841: Symposium R – Fundamentals of Nanoindentation and Nanotribology III , 2004 , R9.7
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1. See, e.g., Kohl, M., Dittmann, D., Quandt, E., Winzek, B., Miyazaki, S., and Allen, D.M., Mater. Sci. Eng. A 273–275, 784 (1999).Google Scholar
2. see, e.g., ACTUATOR 2004: Proceedings of the 9th International Conference on New Actuators, edited by H. Borgmann (Messe Bremen GmbH, Bremen, 2004).Google Scholar
3. Herbert, E.G., Pharr, G.M., Oliver, W.C., Lucas, B.N., and Hay, J.L., Thin Solid Films 398–399, 331 (2001), and references therein.Google Scholar
4. Ni, W., Cheng, Y.T., and Grummon, D.S., Appl. Phys. Lett. 82, 2811 (2003).Google Scholar
5. Shaw, G.A., Stone, D.S., Johnson, A.D., Ellis, A.B., and Crone, W.C., Appl. Phys. Lett. 83, 257 (2003).Google Scholar
6. Ma, X.G. and Komvopoulos, K., Appl. Phys. Lett. 83, 3773 (2003).Google Scholar
7. Hassdorf, R., Feydt, J., Pascal, R., Thienhaus, S., Boese, M., Sterzl, T., Winzek, B., and Moske, M., Mater. Trans. 43, 933 (2002).Google Scholar
8. Hassdorf, R., Feydt, J., Thienhaus, S., Boese, M., and Moske, M., in SMST-2003: Proceedings of the International Conference on Shape Memory and Superelastic Technologies, edited by Pelton, A.R. and Duerig, T. (Menlo Park, Calif.: SMST Society, 2004) pp. 713–722.Google Scholar
9. Chudoba, T., Schwarzer, N., and Richter, F., Surf. Coat. Technol. 154, 140 (2002).Google Scholar
10. Chudoba, T. and Schwarzer, N., ELASTICA 2.1, software demonstration package, copyright asmec GmbH, Rossendorf, Germany.Google Scholar
11. Auricchio, F., Int. J. Plasticity 17, 971 (2001).Google Scholar
12. Shu, Y.C. and Bhattacharya, K., Acta mater. 46, 5457 (1998).Google Scholar