NDT, or non-destructive testing, is a technique for examining materials and parts for flaws and faults without causing harm or changing the part being examined. This makes it a useful tool in many fields, including manufacturing, building, and aerospace.

In order to find flaws and imperfections in materials, NDT techniques rely on the characteristics of sound, light, magnetism, and electricity. Typical NDT techniques include:

1. Ultrasonic testing: This technique examines the material’s thickness to look for faults or changes. High-frequency sound waves are used.

2. Radiographic testing: This technique creates images of a material’s internal structure using X-rays or gamma rays.

3. Magnetic particle testing: This technique examines ferromagnetic materials for surface and near-surface flaws using magnetic fields.

4. Liquid penetrant testing: This technique involves coating a component with a dye or fluorescent liquid that penetrates any surface flaws before being wiped off and scrutinised under UV light.

5. Eddy current testing makes use of electromagnetic induction to find changes in a material’s composition or conductivity.

Metal, plastic, ceramic, and composite materials, as well as other materials and components, can all have faults and defects that can be found with NDT testing.

It is a crucial instrument for guaranteeing the dependability and safety of crucial parts and systems in a number of sectors.