Non-destructive evaluation (NDE) is a method of testing materials, components, and systems without causing any damage to the object being tested. This type of testing is used to detect flaws, cracks, and other defects that may be present in the material, component, or system. NDE is an important tool for ensuring the safety and reliability of products and structures. It is used in a variety of industries, including aerospace, automotive, and medical. NDE can be used to inspect materials for cracks, corrosion, and other defects that could cause failure. It can also be used to measure the strength and integrity of materials and components. NDE can be used to detect changes in material properties, such as changes in hardness or elasticity. NDE can also be used to monitor the performance of components and systems over time. NDE is an important tool for ensuring the safety and reliability of products and structures, and can help reduce the cost of repairs and maintenance.