Optimization of neutron tomography for rapid hydrogen concentration inspection of metal castings

Authors
Gibbons, MR Richards, WJ Shields, K
Citation
Mr. Gibbons et al., Optimization of neutron tomography for rapid hydrogen concentration inspection of metal castings, NUCL INST A, 424(1), 1999, pp. 53-57
Citations number
8
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
424
Issue
1
Year of publication
1999
Pages
53 - 57
Database
ISI
SICI code
0168-9002(19990311)424:1<53:OONTFR>2.0.ZU;2-H
Abstract
Hydrogen embrittlement describes a group of phenomena leading to the degrad ation of metal alloy properties. The hydrogen concentration in the alloy ca n be used as an indicator for the onset of embrittlement. A neutron tomogra phy system has been optimized to perform nondestructive detection of hydrog en concentration in titanium aircraft engine compressor blades. Preprocessi ng of backprojection images and postprocessing of tomographic reconstructio ns are used to achieve hydrogen concentration sensitivity below 200 ppm wei ght. This paper emphasizes the postprocessing techniques which allow automa ted reporting of hydrogen concentration. (C) 1999 Elsevier Science B.V. All rights reserved.