Crack, Crater, Crazing, Creep, Deformation, Delimitation, Dent, Deviation, Depressed Imperfection

Tabel 2.1 g

DEFFECT	DESCRIPTION
Crack	A partial fracture. Linear imperfection in the form of a narrow break or fissure. Usual cause is excessive stress due to sudden overloading, extension of a nick or scratch, or overheating.
Crater	A depression at the termination of a weld bead.
Crazing	A network of minute cracks appearing in the coating of coated parts.
Creep	Gradual continuous distortion or plastic flow under constant stresses.
Deformation	Any alteration or change of shape, diminution, or configuration resulting from stress or damage.
Delimitation	A separation of the layers in a layered material.
Dent	Small smoothly rounded hollow in the surface. Usual causes are concentrated overloading resulting from peening, or presence of chips between loaded surfaces, or the striking of a part.
Deviation	Any condition that causes a part to differ from the manufacturer’s blueprint.
Depressed Imperfection	One that is below the general surface of the part, may have either smooth or irregular sharp edges or bottom