Computed radiography, a form of X-ray imaging, has been embraced widely by many major manufacturing companies. As a type of nondestructive testing (NDT), computed radiography is a powerful tool in the aerospace sector where it is frequently used to ensure the safety and integrity of manufactured components and assemblies. Imaging plates can be used directly in the hard cassette or multiple image plates via a feed tray, with up to two-meter imaging plates available for panoramic exposures. The quality of the images can be checked in real time, as they are generated and then digitally transferred and enhanced swiftly. This makes the CR technique much more efficient, through both eliminating the processing stage required for radiographic film and through the production of a much more superior quality of the final image.
Fluorescent Penetrant Inspection
Penetrant inspection is a popular detection method because it is relatively inexpensive and can be administered on a surface that is oriented in nearly any direction. Penetrant Inspection may take the form of Fluorescent Penetrant Inspection (FPI) or visible Liquid Penetrant Inspection (LPI).
Each penetrant testing has its advantages, so the selected method will be based on an internal or customer specification, or the type of part being examined. For example, FPI is often used on aircraft parts, while LPI is frequently used on machined surfaces, although neither alloy type nor product size limits which method is used.
Magnetic Particle Inspection
Magnetic particle Inspection (MPI) is a nondestructive testing (NDT) process for detecting surface and shallow subsurface discontinuities in ferromagnetic materials such as iron, nickel, cobalt, and some of their alloys. The process puts a magnetic field into the part. The piece can be magnetized by direct or indirect magnetization. Direct magnetization occurs when the electric current is passed through the test object and a magnetic field is formed in the material. Indirect magnetization occurs when no electric current is passed through the test object, but a magnetic field is applied from an outside source. The magnetic lines of force are perpendicular to the direction of the electric current, which may be either alternating current (AC) or some form of direct current (DC) (rectified AC).