fracture

fracture, In engineering, rupture of a material too weak to sustain the forces on it. A fracture of the workpiece during forming can result from flaws in the metal; these often consist of nonmetallic inclusions such as oxides or sulfides trapped in the metal during refining. Laps are another type of flaw, in which part of a metal piece is inadvertently folded over on itself but the two sides of the fold are not completely...