Any spring produced by cold forming from any material with or without subsequent heat treatment. Mechanical Twin A twin formed in a metal during plastic deformation by simple shear of the structure. Mechanical Working Plastic deformation or other physical change to which metal is subjected, by rolling, hammering, drawing., etc. to change its shape, properties or structure. May be made by any of the standard processes. Metal An opaque, lustrous, elemental substance that is a good conductor of heat and electricity and, when polished, a good reflector or light.
Most metals are malleable and ductile and are, in general, denser than other substances.
Metal Spraying A process for applying a coating of metal to an object. The metal, usually in the form of wire, is melted by an oxyhydrogen or oxyacetylene blast or by an electric arc and is proficted at high speed by gas pressure against the object being coated. The science concerning the constituents and structure of metals and alloys as revealed by the microscope. An optical instrument designed for both visual observation and photomicrography of prepared surfaces of opaque materials at magnifications ranging from about 25 to about 1500 diameters. Metastable Possessing a state of pseudo-equilibrium that has a free energy higher than that of the true equilibrium state but from which a system does not change spontaneously.