The High-Strength Steel Corrosion-Fatigue Assessment program was designed to ensure reliability and supportability of current and emerging Naval aircraft by providing requisite engineering support to evaluate issues relevant to corrosion-fatigue of aircraft components. In this multi-year, multi-contract program, tools have been developed to assist in the establishment of maintenance options for corroded components. Experimental and analytical tools have been developed to classify corrosion in a manner tied to a reduction ...
Studies were conducted which determined the capabilities and limitations of ultrasonic NDE techniques for evaluating the interphase/interface region between the fiber and the matrix in metal matrix composites. The major developments include: a physical model of the elastic interphase region between the fiber and matrix in the fiber-reinforced materials; an ultrasonic wave propagation model; an experimental procedure for interface elastic property measurements; experimental determination of the semi-empirical relationship between the ...
There are many digital data collection and analyses techniques which can not be applied to in-field inspections. Of those many techniques the following three will be discussed here: (1) generation of C-scan images by means of software gates which are applied to digitized RF A-scans, (2) removal of the entry-surface echoes from B-scans which are composed of digitized RF A-scans and (3) application of digital Distance-Amplitude Compensation (DAC) to B-scans ...
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