DETERMINATION OF THE GEOMETRY OF HIDDEN DEFECTS BY ULTRASONIC PULSE ANALYSIS TESTING
Abstract
Paper presented at the 1962 Army Science Conference, 20-22 June 1962, at the United States Military Academy, West Point, New York. DESCRIPTORS: *Ultrasonics, *Ultrasonic spec trum analysis, *Metals, *Pulse analyzers, S OLIDS, Frequency, Tests. Current methods for ultrasonic inspection of metals and other solid materials are limited by their inability to determine the geometry of concealed defects if these defects are comparable i size, or smaller than the width of the ultrasonic search beam. Whenever such relatively small flaws are involved, ultrasonic pulse echo testing, if conducted at a single fre ency, will yield the flaw location only but no i formation on th fl w geometry. Hence, it is very difficult to interpret the test results. The difficulty can be overco e by introducing the novel ultrasonic test method described in this paper. In his method, ultrasonic signals are utilized which contain a broad band of frequencies, and in analogy to optics, can therefore be considered as white ult asonic pulses. The form and spectral s information on the defect configuration. The successful application of the ultra onic pulse analysis method for differenti ing between fl ws of variou configurations is illustrated by a number of test examples. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1962
- Accession Number
- AD0286643
Entities
People
- O.r. Gericke
Organizations
- Army Research Office