Differential scanning calorimetry of superelastic Nitinol for tunable cymbal transducers

Feeney, A. and Lucas, M. (2015) Differential scanning calorimetry of superelastic Nitinol for tunable cymbal transducers. Journal of Intelligent Material Systems and Structures, 27(10), pp. 1376-1387. (doi: 10.1177/1045389X15591383)

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Abstract

Recent research has shown that estimations of the transformation temperatures of superelastic Nitinol using differential scanning calorimetry can be inaccurate, in part, due to the residual stress in the material. Superelastic Nitinol is selected as the end-cap material in a tunable cymbal transducer. The differential scanning calorimetry accuracy is initially probed by comparing transformation temperature measurements of cold-worked superelastic Nitinol with the same material after an annealing heat treatment, administered to relieve stresses from fabrication. The accuracy is further investigated through a study of the vibration response of the cymbal transducer, using electrical impedance measurements and laser Doppler vibrometry to demonstrate that the change in resonant frequencies can be correlated with the transformation temperatures of the Nitinol measured using differential scanning calorimetry. The results demonstrate that differential scanning calorimetry must be used with caution for superelastic Nitinol, and that an annealing heat treatment can allow subsequent use of differential scanning calorimetry to provide accurate transformation temperature data.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Feeney, Dr Andrew and Lucas, Professor Margaret
Authors: Feeney, A., and Lucas, M.
College/School:College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Journal of Intelligent Material Systems and Structures
Publisher:SAGE Publications
ISSN:1045-389X
ISSN (Online):1530-8138
Published Online:02 July 2015
Copyright Holders:Copyright © 2015 The Authors
First Published:First published in Journal of Intelligent Material Systems and Structures 27(10:1376-1387
Publisher Policy:Reproduced under a Creative Commons License
Data DOI:10.5525/gla.researchdata.181

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
554791EPSRC Doctoral Training Grant 2010-14Mary Beth KneafseyEngineering & Physical Sciences Research Council (EPSRC)EP/P505534/1VICE PRINCIPAL RESEARCH & ENTERPRISE
554792EPSRC Doctoral Training Grant 2010-14Mary Beth KneafseyEngineering & Physical Sciences Research Council (EPSRC)EP/P505534/1VICE PRINCIPAL RESEARCH & ENTERPRISE
554793EPSRC Doctoral Training Grant 2010-14Mary Beth KneafseyEngineering & Physical Sciences Research Council (EPSRC)EP/P505534/1VICE PRINCIPAL RESEARCH & ENTERPRISE
554794EPSRC Doctoral Training Grant 2010-14Mary Beth KneafseyEngineering & Physical Sciences Research Council (EPSRC)EP/P505534/1VICE PRINCIPAL RESEARCH & ENTERPRISE