An ultrasonic study of relaxation processes in pure and mechanically alloyed tungsten
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F20%3A00537989" target="_blank" >RIV/61388998:_____/20:00537989 - isvavai.cz</a>
Alternative codes found
RIV/68081723:_____/20:00537989 RIV/61389021:_____/20:00537989 RIV/61389005:_____/20:00537989 RIV/68407700:21340/20:00344890 RIV/00216208:11320/20:10424154
Result on the web
<a href="https://www.sciencedirect.com/science/article/abs/pii/S0263436820301098" target="_blank" >https://www.sciencedirect.com/science/article/abs/pii/S0263436820301098</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijrmhm.2020.105233" target="_blank" >10.1016/j.ijrmhm.2020.105233</a>
Alternative languages
Result language
angličtina
Original language name
An ultrasonic study of relaxation processes in pure and mechanically alloyed tungsten
Original language description
High-temperature internal friction in a pure tungsten single crystal, polycrystals with different grain sizes, and mechanically alloyed tungsten polycrystals was studied. Positron annihilation spectroscopy was used to prove that all studied materials contain a detectable amount of dislocations. Then, resonant ultrasound spectroscopy was applied to determine the internal friction evolution with temperature from room temperature up to 740 degrees C. For the pure tungsten samples, a sharp increase of internal friction was observed for temperatures above 470 degrees C (for the single crystal) or above 400 degrees C (for the polycrystals), the activation energy corresponding to this increase was the same as the activation energy for the ductile-to-brittle transition in tungsten reported in the literature. For the alloyed materials, direct observation of the onset of this relaxation mechanism was impossible due to additional effects resulting from the secondary phases in the material.n
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
10307 - Acoustics
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
2020
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 Refractory Metals & Hard Materials
ISSN
0263-4368
e-ISSN
—
Volume of the periodical
90
Issue of the periodical within the volume
August
Country of publishing house
GB - UNITED KINGDOM
Number of pages
7
Pages from-to
105233
UT code for WoS article
000527310900007
EID of the result in the Scopus database
2-s2.0-85082173041