edge preparation
Conditioning of the cutting edge, such as a honing or chamfering, to make it stronger and less susceptible to chipping. A chamfer is a beve…
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Glossary Terms
electrical-discharge machining (EDM)
Process that vaporizes conductive materials by controlled application of pulsed electrical current that flows between a workpiece and elect…
ram EDM
Process using a shaped electrode made from graphite or copper. The electrode is separated by a nonconductive liquid and maintained at a clo…
wire EDM
Process similar to ram electrical-discharge machining except a small-diameter copper or brass wire is used as a traveling electrode. Usuall…
effectuating device
Hand, gripper, toolholder, magnet, spray gun, drill, welding head or other electronic/mechanical device for holding workpieces and/or perfo…
elastic limit
Maximum stress that a material can sustain without deforming.
elasticity
Property of a material to deform under stress and recover its original shape and dimensions after release of stress.
electrochemical deburring
Variation on electrochemical machining designed to remove burrs and impart small radii to corners. The process normally uses a specially sh…
electrochemical grinding
Variation on electrochemical machining that uses a conductive, rotating abrasive wheel. Chemical solution is forced between the wheel and t…
electrochemical-discharge grinding
Combination of electrochemical grinding and electrical-discharge machining. Material is removed by both processes. The workpiece and the gr…
elongation
In tensile testing, the increase in the gage length, measured after fracture of the specimen within the gage length, usually expressed as a…
embrittlement
Reduction in the normal ductility of a metal due to a physical or chemical change. Examples include blue brittleness, hydrogen embrittlemen…