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Measurement of internal friction in polycrystalline materials using laser-generated ultrasound

Messung der inneren reibung in polykristallinen Materialien mittels Laserultraschall
 
: Haberer, B.; Arnold, W.; Willems, H.; Paul, M.

Cantelli, R.; Cannelli, G.; Cordero, F.:
10th International Conference on Internal Friction and Ultrasonic Attenuation in Solids. ICIFUACS-10
Amsterdam: Elsevier, 1994 (Journal of alloys and compounds 211/212)
S.636-639
International Conference on Internal Friction and Ultrasonic Attenuation in Solids (ICIFUACS) <10, 1993, Rome>
Englisch
Konferenzbeitrag
Fraunhofer IZFP ()
absorption; attenuation; innere Reibung; internal friction; laser ultrasonics; Laserultraschall; Nachhall-Methode; reverberation method; Ultraschall; Ultraschallschwächung; ultrasonics

Abstract
A new technique is presented allowing one to measure ultrasonic absorption in a wide temperature range in polycrystalline materials and even in single crystals, by generating reverberation fields by short laser pulses, and by observing their decay using optical interferometers for detection.

: http://publica.fraunhofer.de/dokumente/PX-23060.html