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Nanoindentaion and Wear Behavior of Nickel-Titanium Alloys and Thin Films

Published online by Cambridge University Press:  17 March 2011

Wangyang Ni  and
David S. Grummon
Wangyang Ni
Affiliation:
Department of Materials Science and Mechanics, Michigan State University, East Lansing, MI 48823, USA Materials and Processes Laboratory, General Motors Research and Development Center, Warren, MI 48090, USA
David S. Grummon
Affiliation:
Department of Materials Science and Mechanics, Michigan State University, East Lansing, MI 48823, USA
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Abstract

The unusual constitutive behavior of NiTi alloys that display shape memory and transformational superelasticity may impart useful tribological properties. This paper presents some preliminary results on nanoindentation and pin-on-disk wear experiments that suggest potential tri-bological applications of NiTi alloys. It is shown that high levels of spring-back reversibility together with high hardness, as measured by nanoindentation experiments, correlate with improved wear resistance in bulk Nitinol alloys. Amorphous thin films of equiatomic NiTi, which are readily produced by physical vapor deposition, were found to be especially hard and wear resistant. Finally, stress induced B2-B19' transformation is shown to occur during wear-loading of martensitic NiTi, indicating that wear processes are capable of inducing superelastic effects in B2 NiTi alloys.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 697: Symposium P – Surface Engineering 2001--Fundamentals and Applications , January 2001 , P2.9
Copyright
Copyright © Materials Research Society 2002

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