Each plot compares the ultrasonic spectroscopy response from the front and back of each region. The response for the front of region A with poor brazing produced a resonance peak corresponding to the thickness of the plate, whereas the response for the back of region A with better brazing produced a very low, attenuated signal. The response for the front of region B with intermediate brazing produced a low-amplitude resonance peak, whereas the response from the back of region B with better brazing produced a very low amplitude signal. The responses for both the front and back of region D with good brazing were very low amplitude, attenuated signals. Neither signal produced a resonance peak.
Last updated: September 3, 2004 11:01 AM
Responsible NASA Official:
Gynelle.C.Steele@nasa.gov
216-433-8258
Point of contact for NASA Glenn's Research & Technology reports:
Cynthia.L.Dreibelbis@nasa.gov
216-433-2912
SGT, Inc.
Web page curator:
Nancy.L.Obryan@nasa.gov
216-433-5793
Wyle Information Systems, LLC
