"Nondestructive inspection" (NDI) is a process or technique used to inspect the condition of a material, component, or system without causing any damage to it. NDI techniques are used to identify and assess defects or flaws in materials or components, such as cracks, corrosion, or other types of damage, without having to disassemble or destroy the item being inspected.
NDI techniques are commonly used in the aerospace industry to inspect a variety of materials and components, including metals, composites, and other materials used in the construction of aircraft, spacecraft, and other aerospace vehicles. These techniques can be used to inspect a wide range of items, including structural components, engines, and other mechanical systems.
NDI techniques are important in the aerospace industry because they allow engineers and technicians to identify and address problems with materials or components before they become a safety hazard or cause a failure. This helps to ensure the reliability and safety of aerospace systems, as well as reducing maintenance and repair costs.
Examples of NDI techniques used in the aerospace industry include ultrasonic testing, radiographic testing, eddy current testing, and visual inspection.