Title :
The influence of multiple scattering in incoherent ultrasonic inspection of coarse grain stainless steel
Author :
Bordier, J.M. ; Fink, M. ; Le Brun, A. ; Cohen-Tenoudji, F.
Author_Institution :
Paris Univ., France
Abstract :
Ultrasonic nondestructive testing (NDT) of cast stainless steel is known to be difficult due to a huge loss of focusing of the ultrasonic beam and to a high level of speckle noise generated by the coarse grain structure. It is shown that a multiple scattering process is generated by these materials. A method to characterize the incoherent component of the echographic signal is proposed
Keywords :
acoustic signal processing; flaw detection; stainless steel; ultrasonic materials testing; US NDT; coarse grain stainless steel; echographic signal; incoherent ultrasonic inspection; loss of focusing; multiple scattering; speckle noise; Acoustic transducers; Apertures; Frequency; Grain size; Inspection; Optical propagation; Optical scattering; Signal to noise ratio; Steel; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1991. Proceedings., IEEE 1991
Conference_Location :
Orlando, FL
DOI :
10.1109/ULTSYM.1991.234079
