08-05-2017, 10:13 AM
Non-destructive testing (NDT) is the process of inspecting, testing or evaluating materials, components or sets of discontinuities or differences in characteristics without destroying the serviceability of the part or system. In other words, when the inspection or test is completed, the part can still be used.
In contrast to NDTs, other assays are destructive in nature and are therefore performed in a limited number of samples ("batch sampling"), rather than materials, components or assemblies actually put into service.
These destructive tests are often used to determine the physical properties of materials such as impact strength, ductility, yield and ultimate tensile strength, fracture toughness and fatigue strength, but discontinuities and differences in material characteristics Are most effectively encountered by END.
Today, non-destructive modern tests are used in manufacturing, manufacturing and in-service inspections to ensure the integrity and reliability of the product, control manufacturing processes, reduce production costs and maintain a uniform level of quality. During construction, the END is used to ensure the quality of materials and joining processes during the manufacturing and erection phases, and in-service NDT inspections are used to ensure that the products in use continue to have the integrity necessary to Ensure their utility and safety from the public.
It should be noted that although the medical field uses many of the same processes, the term "nondestructive testing" is generally not used to describe medical applications.