Temperature and microstructure dependence of localized tensile deformation of superelastic NiTi wires
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F19%3A00504698" target="_blank" >RIV/61389005:_____/19:00504698 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/19:00517457 RIV/68407700:21340/19:00337225
Result on the web
<a href="https://doi.org/10.1016/j.matdes.2019.107797" target="_blank" >https://doi.org/10.1016/j.matdes.2019.107797</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matdes.2019.107797" target="_blank" >10.1016/j.matdes.2019.107797</a>
Alternative languages
Result language
angličtina
Original language name
Temperature and microstructure dependence of localized tensile deformation of superelastic NiTi wires
Original language description
Superelastic NiTi wires possessing wide range of microstructures were deformed in tensile tests up to the end of the stress plateau in a wide temperature range -20 -200 degrees C. unloaded and stress free heated to similar to 200 degrees C. The recoverability of upper plateau strains was evaluated in dependence on the test temperature and wire microstructure. At low temperatures below 20 degrees C, the upper plateau strains are fully recoverable upon unloading and heating. With increasing test temperature, however, the recoverability of upper plateau strains becomes gradually lost. Unusually long upper plateaus (10-17%) were observed at test temperatures, at which the upper plateau stress approached the yield stress for plastic deformation of martensite. The volume fraction of the martensite phase at the end of the stress plateau (evaluated by in-situ electric resistance and synchrotron x-ray diffraction) decreases with increasing test temperature in the range where the long plateaus were observed. TEM analysis revealed high density of {114) austenite twins in wires deformed in this temperature range. These observations are rationalized by gradual increase of the activity of the stress-induced B2 -> B19' - B2(T) martensitic transformation into twinned austenite and plastic deformation by dislocation slip with increasing test temperature.
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
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Materials and Design
ISSN
0264-1275
e-ISSN
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Volume of the periodical
174
Issue of the periodical within the volume
7
Country of publishing house
GB - UNITED KINGDOM
Number of pages
21
Pages from-to
107797
UT code for WoS article
000466951500013
EID of the result in the Scopus database
2-s2.0-85062748549