INTERNAL FRICTION IN MAGNESIUM COMPOSITES BY RESONANCE SPECTROSCOPY

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F08%3APU77830" target="_blank" >RIV/00216305:26220/08:PU77830 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

INTERNAL FRICTION IN MAGNESIUM COMPOSITES BY RESONANCE SPECTROSCOPY

Original language description

We have analyzed magnesium composites structure by internal friction at sample resonance frequency. The first, second and third resonance signal was measured by FFT. Results measured on two identical samples of magnesium composites, denoted as H01 and H02 are presented. We have applied aging process on sample H02 by liquid nitrogen at temperature 77 K, where the sample was dipped for 15 minutes. The differences of damped harmonic motion parameters for three harmonic signals were fitted by standard equation for damped harmonic motion. The forced vibrations amplitudes for the first harmonic signal are similar for both samples. We can see in our case that the amplitude of the forced vibrations of both samples is the lowest for the second harmonic signal.Sample H02 has much higher amplitude for the third harmonic signal then sample H01. Amplitude of third harmonic signal increases due to ageing. If we compare the values of vibration damping coefficients for different harmonics then we fou

Czech name

INTERNAL FRICTION IN MAGNESIUM COMPOSITES BY RESONANCE SPECTROSCOPY

Czech description

We have analyzed magnesium composites structure by internal friction at sample resonance frequency. The first, second and third resonance signal was measured by FFT. Results measured on two identical samples of magnesium composites, denoted as H01 and H02 are presented. We have applied aging process on sample H02 by liquid nitrogen at temperature 77 K, where the sample was dipped for 15 minutes. The differences of damped harmonic motion parameters for three harmonic signals were fitted by standard equation for damped harmonic motion. The forced vibrations amplitudes for the first harmonic signal are similar for both samples. We can see in our case that the amplitude of the forced vibrations of both samples is the lowest for the second harmonic signal.Sample H02 has much higher amplitude for the third harmonic signal then sample H01. Amplitude of third harmonic signal increases due to ageing. If we compare the values of vibration damping coefficients for different harmonics then we fou

Type

D - Article in proceedings

CEP classification

BE - Theoretical physics

OECD FORD branch

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Project

<a href="/en/project/GA106%2F07%2F1393" target="_blank" >GA106/07/1393: Nonlinear ultrasonic spectroscopy of magnesium metallic composits and alloys</a><br>

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2008

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

6th Workshop NDT 2008

ISBN

978-80-7204-610-2

ISSN

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e-ISSN

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Number of pages

4

Pages from-to

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Publisher name

Marta Kořenská and Luboš Pazdera

Place of publication

Brno, Czech Republic

Event location

Brno

Event date

Nov 22, 2008

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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