Visual inspection is a non-destructive testing (NDT) method widely used in mechanical testing to examine the surface and external characteristics of a component or material. It involves visually examining the object for any visible defects, such as cracks, corrosion, surface irregularities, or dimensional discrepancies. Visual inspection is often the first step in NDT, as it provides valuable initial information about the condition of the material or part being tested.

Liquid Penetrant Testing (LPT), also known as Liquid Penetrant Inspection (LPI) or Dye Penetrant Testing (DPT), is a widely used non-destructive testing (NDT) method to detect surface defects and discontinuities in materials. It is particularly effective for inspecting non-porous materials like metals, ceramics, plastics, and some non-metallic materials.

Magnetic Particle Testing (MPT), also known as Magnetic Particle Inspection (MPI), is a widely used non-destructive testing (NDT) method for detecting surface and near-surface defects in ferromagnetic materials. This technique is particularly effective in inspecting materials like iron, steel, nickel, and cobalt, where the magnetic field can penetrate and interact with the material’s structure.

Radiographic Testing (RT), also known as Radiography or X-ray Testing, is a powerful non-destructive testing (NDT) method used to examine the internal structure of materials and detect flaws and defects that may not be visible on the surface. RT is particularly useful for inspecting thick sections of materials, welds, and complex structures.

Ultrasonic Testing (UT) is a widely used non-destructive testing (NDT) method that utilizes high-frequency sound waves to inspect the internal structure of materials and detect defects and flaws. It is particularly effective for inspecting welds, forgings, castings, and other manufactured components made of metals and some non-metallic materials.