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Non-destructive Inspection (NDI) of Engineering Structures and Components

Nondestructive Inspection (NDI) is the test methods used to examine an object, material or system without impairing its future usefulness. The term is generally applied to non medical investigations of material integrity.

Nondestructive Inspection is used to investigate the material integrity of the test engineering component. Nondestructive testing is concerned in a practical way with the performance of the test piece. NDI will provide the condition of a structure and should provide an understanding of next inspection.

Nondestructive testing is not confined to crack detection. Other discontinuities include porosity, wall thinning from corrosion and many sorts of disbonds. Nondestructive material characterization is a growing field concerned with material properties including material identification and micro structural characteristics - such as resin curing, case hardening and stress - that have a direct influence on the service life of the test part/component. Nondestructive Inspection has also been defined by listing or classifying the various methods which includes liquid penetrant, magnetic particle, eddy current, ultrasonic, x-ray/gamma ray, visual/optical, sonic/resonance and infrared thermography.  This approach is practical in that it typically highlights methods in use by industry.

Structures & different assemblies of engineering components are made from various materials, such as aluminum alloy, steel, titanium and composite materials.


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