Contrails
The goal of the Contrails project is to help preserve and disseminate the technical record of 20th century aerospace research, highlighting in particular the research endeavors of the Illinois Tech community.

Development of Ultrasonic Techniques for Defect Evaluation

Report Number: ASD TDR 62-8
Author(s): J. B. Ramsey, W. H. Rowe
Corporate Author: Automation Industries, Inc.
Laboratory: Directorate of Materials and Processes
Date of Publication: 1963-02
Pages: 152
Contract: AF 33(616)-6793
Project: 7381
Task: 73812
AD Number: AD0402823

Abstract:
The results of investigations to determine the effects of several metallurgical and acoustical variables on the ultrasonic signal strength using commercially available ultrasonic flaw detection equipment are reported. Applied to various metals used in aerospace structures and components, these investigations resulted in the separation and determination of important acoustical properties that were expected to indicate the cause for differences in the trans mission of ultrasonic energy in the various materials. A method was developed for applying correction factors to test blocks of one metal in order to estimate the size of defects in other metals. Beam collimation techniques were studied to determine optimum conditions for detecting defects and displaying them on both cathode ray image and C-Scan (plan view) facsimile paper recordings. Some investigations were also performed to separate and identify shear and surface (Rayleigh) waves.

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