Manufacturing Industry
Laser ultrasonics identifies fatigue cracks in aircraft.(TESTING/ANALYSIS)
Advanced Materials & Processes, October, 2005
A technology in which laser ultrasonic imaging can identify fatigue cracks initiated from pitting corrosion sites on various types of material surfaces has reportedly been developed by the Air Force Research Laboratory, Wright-Patterson Air Force Base, Dayton, Ohio. Scanning laser ultrasonic imaging detects elastic waves propagating along the material surface.
Researchers then evaluate ultrasonic scattering signatures, and they are able to correlate crack features with corrosion pit depths, material surface conditions, and volume loss levels. This can help to reduce the risk of catastrophic failure in aircraft structural components. This technique provides an advanced crack imaging capability that has proved to be extremely useful for micro-characterization of...
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