Measurement of coherent surface acoustic wave attenuation in polycrystalline aluminum
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F18%3A00500167" target="_blank" >RIV/61389005:_____/18:00500167 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1063/1.5074180" target="_blank" >http://dx.doi.org/10.1063/1.5074180</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.5074180" target="_blank" >10.1063/1.5074180</a>
Alternative languages
Result language
angličtina
Original language name
Measurement of coherent surface acoustic wave attenuation in polycrystalline aluminum
Original language description
Attenuation of Rayleigh-type surface acoustic waves induced by grain-boundary scattering is studied experimentally and theoretically by an effective medium approach. A frequency domain opto-acoustic laboratory setup, capable of measuring a coherent Rayleigh wave response by emulating an ensemble average via spatial averaging, is presented. Measurements are conducted on polycrystalline aluminum at ultrasonic frequencies from 10 MHz to 130 MHz. A constant effective phase velocity of 2893 m s(-1) is found below 80 MHz. The effective attenuation coefficient varies in the whole frequency range by nearly two orders of magnitude, and shows classical scattering behavior, comprising stochastic and geometric scattering regimes. A semi-analytical attenuation model is presented, valid below the geometric limit. The model incorporates the material's spatial two-point correlation function obtained from metallurgical micrographs. Comparisons to experimentally obtained attenuation coefficients show good quantitative agreement, with differences in the frequency power-law dependence. This study attempts to elucidate microstructure induced surface acoustic wave attenuation experimentally by means of a statistical approach. The proposed method and the obtained findings contribute to the understanding of wave propagation in heterogeneous media, and promote the use of surface acoustic waves in non-destructive microstructure characterization.
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
<a href="/en/project/EF16_013%2F0001794" target="_blank" >EF16_013/0001794: European Spallation Source - participation of the Czech Republic - OP</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
AIP ADVANCES
ISSN
2158-3226
e-ISSN
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Volume of the periodical
8
Issue of the periodical within the volume
12
Country of publishing house
US - UNITED STATES
Number of pages
14
Pages from-to
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UT code for WoS article
000454615100020
EID of the result in the Scopus database
2-s2.0-85059315700