Views: 0 Author: Olivia Zhang Publish Time: 2023-09-25 Origin: Site
In stainless steel inspection, non-destructive testing (NDT) is key. It assures product quality and structural integrity. NDT uses acoustic, optical, magnetic, and electrical properties. These detect defects or heterogeneities in the object, without damaging it.
Magnetic Particle Inspection (MPI) finds tiny surface and sub-surface defects. It's used for ferromagnetic materials. It uncovers cracks, inclusions, and stringers. But it's useless for non-magnetic materials. These include austenitic stainless steel, copper, aluminum, magnesium, titanium, etc.
Liquid Penetrant Inspection (LPI) is another NDT method. It's versatile, sensitive, clear, and easy to use. But, it has a limitation. It only detects open-to-surface defects. Its efficiency drops when inspecting porous, loosely bonded materials and rough components.
Finally, Radiographic Testing (RT) uses X-rays to check for internal defects inside an object. It's useful for a lot of things. However, it can't tell how deep a defect is below the surface. Plus, there's a radiation risk that requires careful handling.
Choosing an NDT technique depends on the material and potential defect types. UT and RT are best for finding internal defects. MPI and LPI excel at finding surface defects. Each technique has its pros and cons. They should be chosen carefully based on the context. This ensures the quality and performance of stainless steel products.
