Exploratory Development of Nondestructive Testing Techniques for Diffusion Bonded Interfaces
Abstract
A NDT methods evaluation was performed on three prototype H-53 helicopter rotor hubs diffusion bonded from 1/2-inch titanium plate. The NDT evaluation included ultrasonic, radiographic, and penetrant methods, and showed that ultrasonic techniques offered significant potential for developing a reliable, high sensitivity inspection system. Conventional ultrasonic techniques were the primary NDT method evaluated, and significant progress is reported in applying ultrasonic techniques to complex diffusion bonded structures. A most important factor is the need for systematic evaluation and understanding of the material effects on the acoustic beam propagation characteristics. Detailed recommendations are made for ultrasonic test improvements including data recording and analysis techniques; a unique ultrasonic 'nodding' transducer system for inspecting discontinuities not normal to the inspection surfaces; a servo-controlled transducer manipulator system; an automatically controlled recorder gate system; and an automatic digital signal depth and amplitude measuring system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1970
- Accession Number
- AD0877005
Entities
People
- Forrest M. Coate
- George Martin
- J. A. Naughton
- John F. Moore
- R. A. Brose