Reconstruction of Heat Sources Induced in Superelastically Loaded Ni-Ti Wire By Localized Deformation Processes
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F21%3A00532228" target="_blank" >RIV/61389005:_____/21:00532228 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/21:00541725 RIV/00216208:11320/21:10438346 RIV/68407700:21340/21:00344888
Result on the web
<a href="https://doi.org/10.1007/s11340-020-00648-8" target="_blank" >https://doi.org/10.1007/s11340-020-00648-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s11340-020-00648-8" target="_blank" >10.1007/s11340-020-00648-8</a>
Alternative languages
Result language
angličtina
Original language name
Reconstruction of Heat Sources Induced in Superelastically Loaded Ni-Ti Wire By Localized Deformation Processes
Original language description
Background Shape memory alloys (SMAs) are phase transforming materials featuring strong thermomechanical couplings. Infrared thermography and heat source reconstruction (HSR) enable to track the calorific signature of deformation processes. Objective The objective was to characterize the transformation processes in a superelastic nickel-titanium SMA wire subjected to a force-controlled superelastic tensile cycle. Methods In-situ recorded thermographs were converted into spatiotemporal maps of heat sources using an in-house developed post-processing method based on the heat diffusion equation resolved numerically for unknown heat sources. Results Sequentially appearing patterns of localized transformation events of four types were identified and associated with martensite bands nucleations and their subsequent merging upon tensile loading. Analogically, the events associated with austenite bands nucleations and their subsequent merging were identified upon unloading. In addition, weak heat sources observed before and after the localized transformation events were associated with the homogeneous martensitic transformation. Conclusions The intrinsic dissipation heat associated with the nucleation and merging events is estimated to be similar to 25% of the released/absorbed latent heat.
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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Experimental Mechanics
ISSN
0014-4851
e-ISSN
1741-2765
Volume of the periodical
61
Issue of the periodical within the volume
FEB
Country of publishing house
US - UNITED STATES
Number of pages
18
Pages from-to
349-366
UT code for WoS article
000564509000001
EID of the result in the Scopus database
2-s2.0-85090014592