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Indentation response of a NiTi shape memory alloy: modeling and experiments

Maletta, C., Furgiuele, F., Sgambitterra, E., Callisti, M., Mellor, B.G. and Wood, R.J.K. (2012) Indentation response of a NiTi shape memory alloy: modeling and experiments Frattura ed Integrita Strutturale, 21, pp. 5-12. (doi:10.3221/IGF-ESIS.21.01).

Record type: Article


The indentation response of a pseudoelastic nickel-titanium based shape memory alloy (SMA) has been analyzed. Indentation tests have been carried out at room temperature using a spherical diamond tip and indentation loads in the range 50-500 mN in order to promote a large stress-induced transformation zone in the indentation region and, consequently, to avoid local effects due to microstructural variations. The measured load-displacement data have been analyzed to obtain information on the pseudoelastic response of the alloy. To aid this analysis numerical simulations were performed, by using a commercial finite element (FE) software code and a special constitutive model for SMAs, so as to understand better the microstructural evolution occurring during the indentation process. Finally, the FE model has been used to analyze the effects of temperature on the indentation response of the alloy. This analysis revealed a marked variation of both the maximum and residual penetration depths with increasing test temperature.

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Published date: July 2012
Keywords: shape memory alloys, indentation tests, finite element simulations
Organisations: Engineering Mats & Surface Engineerg Gp


Local EPrints ID: 342613
ISSN: 1971-8993
PURE UUID: 65c05f33-fe56-4fc6-933f-13ec5b62fe20
ORCID for R.J.K. Wood: ORCID iD

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Date deposited: 10 Sep 2012 13:14
Last modified: 18 Jul 2017 05:27

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Author: C. Maletta
Author: F. Furgiuele
Author: E. Sgambitterra
Author: M. Callisti
Author: B.G. Mellor
Author: R.J.K. Wood ORCID iD

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