In this paper, after a description of inspected parts and of needs, we describe the logic followed by SEP in order to develop NDT for new products. The different points of this NDT development approach are: analysis of potential defects, feasability of flat coupons with simulated defects, scanning of various potential NDT, performance evaluation of each technique, capability evaluation on real parts and industrialization of NDT equipment. Then, we present performances and capabilities of 3 techniques, Infrared Thermography, X-ray and Eddy Current, performed on coupons with simulated defects. A large part of exit cone is thin (< 15 mm), so delamination can be pointed out by using IR Thermography in dynamic way, with transmission method. The following figure presents an example of IR thermography results obtained on flat coupons with 3 simulated delaminations (5, 10 and 20 mm diameter).
 Fig.: very thin coupon: 3 mm ; Fig.: thick coupon: 10 mm |
Thick flanges are inspected by axial X-ray radiography and tangential real time radiography. Inclusions due to broken needles are detected during the needling process by Eddy Currents. In the last point, we present the industrialization of inspection of the exit cone using Eddy Currents, IR thermography and X rays. Now, SEP products industrially extendible exit cone RL 10 B2 and all parts are completely inspected with good technical and economical performances.
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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