Titanium is widely used in the manufacture of safety critical components for the aerospace industry. The difficulty related to the automated inspection of a Titanium billet is due to its coarse grain structure, which causes attenuation of the energy as ultrasonic waves are scattered by the grains during propagation. The flaws to be detected are typically less than 1mm in diameter and at depths of up to 150 mm. A new and novel automated phased-array ultrasonic system integrated with a multicoil eddycurrent probe is being developed for the inspection of titanium billet at the raw material manufacturing stage. Ultrasonic inspection within 5mm of the surface is hampered by the 'deadzones', where the interface signal from the surface can mask flaws. To address this, a multicoil eddy-current probe is being integrated in to the system to improve resolution in this area. A novel phased-array ultrasonic probe has been designed and simulated with the objective of enabling electronic beam steering and focussing to compensate for misalignment of the probe due to variations in billet geometry and flaw orientation. The probe will consist of up to 256 elements and enable focal spot sizes of less than 2.5 mm to be maintained at all depths.
A new and novel inspection system for titanium billets
Ein neuartiges Prüfsystem für Titanknüppel
2010
10 Seiten, 8 Bilder, 1 Tabelle, 8 Quellen
Conference paper
Storage medium
English
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