B. Haberer et al., MEASUREMENT OF INTERNAL-FRICTION IN POLYCRYSTALLINE MATERIALS USING LASER-GENERATED ULTRASOUND, Journal of alloys and compounds, 212, 1994, pp. 636-639
A new technique is presented allowing one to measure ultrasonic absorp
tion or internal friction over a wide temperature range in polycrystal
line materials by generating reverberation fields using short laser pu
lses and by observing their decay using optical interferometers for de
tection.