Thermal conductivity and specific heat capacity of austenite and stress‑induced martensite in superelastic NiTi at ambient temperature
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F23%3A00577408" target="_blank" >RIV/68378271:_____/23:00577408 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1007/s10765-023-03279-y" target="_blank" >https://doi.org/10.1007/s10765-023-03279-y</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10765-023-03279-y" target="_blank" >10.1007/s10765-023-03279-y</a>
Alternative languages
Result language
angličtina
Original language name
Thermal conductivity and specific heat capacity of austenite and stress‑induced martensite in superelastic NiTi at ambient temperature
Original language description
Infrared thermography (IRT) and heat source reconstruction (HSR) were used in the study to measure two thermophysical properties of superelastic nickel-titanium (NiTi) shape memory alloy (SMA) wires, namely thermal conductivity and specific heat capacity. A uniaxial testing machine was used to apply constant deformation while allowing temperature measurements by IRT during Joule heating and natural return the thermal equilibrium. The data processing by HSR, including preliminary filtering operations, was preliminarily evaluated from temperatures provided by a model (with added noise). It gave an error of ± 0.5% for the thermal conductivity and ± 1% for the specific heat capacity. The experimental analysis showed that the thermal conductivity of stress-induced martensite is 26% higher than that of austenite at the same temperature (here the ambient temperature). Regarding the specific heat capacity, that of stress-induced martensite is 4.7% lower than that of austenite.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering
Result continuities
Project
<a href="/en/project/GA22-15763S" target="_blank" >GA22-15763S: Strain compatibility issues in mechanically driven martensitic transformations in shape memory alloy polycrystals</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Thermophysics
ISSN
0195-928X
e-ISSN
1572-9567
Volume of the periodical
44
Issue of the periodical within the volume
11
Country of publishing house
US - UNITED STATES
Number of pages
27
Pages from-to
162
UT code for WoS article
001087165000001
EID of the result in the Scopus database
2-s2.0-85174863757