摘要: Computed Tomography (CT) offers an inspection capability with potential to overcome some of the shortcomings in inspection which affect the utilization of castings in the aircraft/aerospace industry. To this end, castings defect s... 展开 Computed Tomography (CT) offers an inspection capability with potential to overcome some of the shortcomings in inspection which affect the utilization of castings in the aircraft/aerospace industry. To this end, castings defect samples were excised from larger cast parts and utilized to evaluate CT sensitivity to a variety of defect types and sizes relative to conventional film radiography. The defects were also inserted into larger cast structures to evaluate loss of sensitivity as a function of geometry. Dimensional phantoms were fabricated to test dimensional measurement accuracy of CT systems. Five different CT systems were used for the CT scanning. Data from resolution and contrast sensitivity phantoms, developed for the program, were used to establish quantitative measures of imaging capability. Keywords: Castings, Computed tomography, Nondestructive evaluation, Radiography. 收起