ADVANCEMENT OF ULTRASONIC TECHNIQUES USING RERADIATED SOUND ENERGIES FOR NONDESTRUCTIVE EVALUATION OF WELDMENTS
Quarterly progress rept. no. 2, 1 Oct-31 Dec 1965
AUTOMATION INDUSTRIES INC BOULDER CO RESEARCH DIV
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The long range objective of the work being performed under this contract is to find a better technique for ultrasonic nondestructive evaluation of weldments. The immediate objective is to provide a clearer understanding of the ultrasonic weld inspection technique known as the Delta Configuration. This technique has been employed for several years, but the approach has been entirely empirical. Before further advances could be made, analytical verification of the physics of the sound energy had to be established. Once the path and pattern of the sound energy can be predicted, instrumentation and fixturing can be developed which will amplify the merits of this technique. A test block, designed to study the phenomena, was used to obtain field intensity maps of the sound energy. The tests provided an unexpected result in that a second energy conversion was identified. The existence of this second mode conversion was verified. Knowledge obtained is important because it increases the potential of using the Delta Configuration for both thick and thin weldments.
- Couplers, Fasteners and Joints
- Manufacturing and Industrial Engineering and Control of Production Systems