NASA NTRS · 19860000087
Finding Brazing Voids by Holography
Abstract
Vibration-induced interference fringes reveal locations of defects. Holographic apparatus used to view object while vibrated ultrasonically. Interference fringes in hologram reveal brazing defects. Holographic technique locates small voids in large brazed joints. Identifies unbrazed regions 1 in. to second power (6 cm to the second power) or less in area.
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Galluccio, R.. 1986-06-01. Finding Brazing Voids by Holography. https://ntrs.nasa.gov/citations/19860000087
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