NDTnet 1998 Aug, Vol.3 No.8

Full-Text - Abstract

Turbine disks for aero engines are highly-stressed components. The integrity of these parts must be proven by non destructive testing inspection especially in critical zones such as the hub bore. The disks must be tested by eddy current method after production as well as during overhaul inspection.

An investigation was carried out on the hub bore of a spin test disk with natural fatigue cracks to find a technique for high resolution eddy current inspection and the method to calculate the prohability-of-detection function (POD) for this inspection.

A special eddy current probe was chosen to improve the signal to noise ratio. The instrument parameters were optimized on a test piece with artificial half penny-shaped slots of different sizes. Areplica technique was used to measure the true size of natural fatigue cracks. The POD was calculated using the a-vs.-a-method.

Abstract Source:
Book of Abstracts, 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN: 87-986898-0-00

Full-Text Source:
Proceedings of the 7th European Conference on Non-Destructive Testing, 26-29 May 1998, ISBN:

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