Indentation response of a NiTi shape memory alloy: modeling and experiments
Indentation response of a NiTi shape memory alloy: modeling and experiments
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.
shape memory alloys, indentation tests, finite element simulations
5-12
Maletta, C.
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Furgiuele, F.
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Sgambitterra, E.
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Callisti, M.
093b5320-2398-4d72-8b09-278d22a08937
Mellor, B.G.
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Wood, R.J.K.
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July 2012
Maletta, C.
b2a354f6-2632-4a7b-bf37-e4c8b4a9231a
Furgiuele, F.
4edf942b-70f4-43a6-b321-462e3027bc4a
Sgambitterra, E.
f15c4421-7f69-40c7-93eb-f4b2ea2aba1e
Callisti, M.
093b5320-2398-4d72-8b09-278d22a08937
Mellor, B.G.
2b13b80f-880b-49ac-82fe-827a15dde2fe
Wood, R.J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
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, .
(doi:10.3221/IGF-ESIS.21.01).
Abstract
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.
Text
Paper_Indentation_2012.doc
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Published date: July 2012
Keywords:
shape memory alloys, indentation tests, finite element simulations
Organisations:
Engineering Mats & Surface Engineerg Gp
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Local EPrints ID: 342613
URI: http://eprints.soton.ac.uk/id/eprint/342613
ISSN: 1971-8993
PURE UUID: 65c05f33-fe56-4fc6-933f-13ec5b62fe20
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Date deposited: 10 Sep 2012 13:14
Last modified: 15 Mar 2024 02:47
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Author:
C. Maletta
Author:
F. Furgiuele
Author:
E. Sgambitterra
Author:
M. Callisti
Author:
B.G. Mellor
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