论文信息 - Advanced neutron tomography

Advanced neutron tomography

A neutron tomography system has been developed as nondestructive technique for quantitative assessment of impurity concentrations in metal castings. Neutrons maximize the sensitivity for certain isotrope while tomography provides the 3D density information. A specific application is the detection of hydrogen down to 200 ppm weight in aircraft engine compressor blades. A number of preprocessing corrections have been implemented for the projection images in order to achieve the detection requirements at a testing rate tree blades per hour. Among the procedures are corrections for neutron scattering and beam hardening in titanium alloy samples.

[1] P. Chirco,et al. Evaluation of hydrogen content in metallic samples by neutron computed tomography , 1994, Proceedings of 1994 IEEE Nuclear Science Symposium - NSS'94.

[2] J. P. Barton. Neutron radiography: an overview , 1976 .

[3] Matthew R. Gibbons,et al. Detection of hydrogen in titanium aircraft components using neutron tomography , 1996, Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring.

[4] J. Leigh,et al. Detection and characterization of the heterogeneous distribution of hydrogen in titanium compressor blades by neutron computed tomography , 1995 .