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Mean strain effects and microstructural observation during in-vitro fatigue testing of NiTi

Record type: Conference or Workshop Item (Paper)

The non-linear nature of the superelastic phase transformation in NiTi means that conventional fatigue life theory is difficult to apply. The volume fraction of martensite/parent phase and its role in the fatigue mechanism is not understood. This paper considers the fatigue life of superelastic NiTi alloys when tested at 2Hz in Ringers solution. In agreement with other researchers [1] [2] it was found that low alternating strains but high mean strain values resulted in the longest fatigue lives. To support the mechanical testing data, optical and electron microscopy was used to investigate the mechanism of fatigue and the role of the NiTi microstructure.

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Citation

Morgan, N.B., Painter, J. and Moffat, A.J. (2003) Mean strain effects and microstructural observation during in-vitro fatigue testing of NiTi In Proceedings of the International Conference on Shape Memory and Superelastic Technologies (SMST-2003). Monterey Institute of Advanced Studies., pp. 303-310.

More information

Published date: May 2003
Venue - Dates: SMST-2003: International Conference on Shape Memory and Superelastic Technologies, 2003-05-01 - 2003-05-01
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 49958
URI: http://eprints.soton.ac.uk/id/eprint/49958
ISBN: 0966050835
PURE UUID: 208e8597-7d24-4bbf-9d3f-12a9370da6b0

Catalogue record

Date deposited: 07 Jan 2008
Last modified: 17 Jul 2017 14:54

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Contributors

Author: N.B. Morgan
Author: J. Painter
Author: A.J. Moffat

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