One-Dimensional Heat Source Reconstruction Applied to Phase Transforming Superelastic Ni-Ti Wire

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21340%2F20%3A00342049" target="_blank" >RIV/68407700:21340/20:00342049 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1007/978-3-030-30098-2_6" target="_blank" >https://doi.org/10.1007/978-3-030-30098-2_6</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/978-3-030-30098-2_6" target="_blank" >10.1007/978-3-030-30098-2_6</a>

Result language
angličtina
Original language name
One-Dimensional Heat Source Reconstruction Applied to Phase Transforming Superelastic Ni-Ti Wire
Original language description
The study deals with the reconstruction of heat sources originating from deformation processes in metals. A one-dimensional method to be applied on wires or bars is introduced and tested on superelastic NiTi wire subjected to force-controlled loading and unloading. Infrared thermography was used for this purpose. Thermal data were then processed by heat source reconstruction technique using a one-dimensional version of the heat diffusion equation. Attention was paid to the identification of the heat exchanges with the specimen’s environment, in particular by convection to the air of ambient temperature. The sensitivity of the method to the degree of spatio-temporal filtering was also tested. Finally, the localization of martensitic transformation in superelastic NiTi was evaluated using the proposed method. It is shown that under force-control regime the phase transformation proceeds in two time-shifted bursts, where each of bursts consists in several displaced and nearly simultaneous transforming zones. This transformation sequence is rationalized by fast latent heat release from the transforming zone upon load control regime, which leads to overheating of surrounding zones thus temporarily suppressing their transformation.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Residual Stress, Thermomechanics & Infrared Imaging and Inverse Problems, Volume 6
ISBN
978-3-030-30097-5
ISSN
2191-5644
e-ISSN
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Number of pages
8
Pages from-to
33-40
Publisher name
Springer Nature Switzerland AG
Place of publication
Basel
Event location
Reno
Event date
Jun 3, 2019
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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