Optimization of Neutron Tomography for Rapid Hydrogen Concentration Inspection of Metal Castings
نویسندگان
چکیده
Hydrogen embrittlement describes a group of phenomena leading to the degradation of metal ahoy properties. The hydrogen concentration in the ahoy can be used as an indicator for the onset of embrittlement. A neutron tomography system has been optimized to perform nondestructive detection of hydrogen concentration in titanium aircraft engine compressor blades. Preprocessing of backprojection images and postprocessing of tomographic reconstructions are used to achieve hydrogen concentration sensitivity below 200 ppm weight. This paper emphasizes the postprocessing techniques which allow automated reporting of hydrogen concentration. PACS codes: 28.41.R~ 42.30.Wb 81.40.N~ and 81.7O.Y~
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