Induction hardening is a type of surface hardening in which a metal part is induction-heated and then quenched.
The quenched metal undergoes a martensitic transformation, increasing the hardness and brittleness of the part.
223. Crystal structure of a material is, generally, examined by
Dye penetrant inspection is a widely applied and low-cost inspection method used to check surface-breaking defects in all non-porous materials (metals, plastics or ceramics).