recessing
A turning operation in which a groove is produced on the periphery or inside a hole of a workpiece. The grooving tool moves at right angles…
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Glossary Terms
recovery
Reduction or removal of workhardening effects, without motion of large-angle grain boundaries.
recrystallization
1. Formation of a new, strain-free grain structure from that existing in cold-worked metal, usually accomplished by heating. 2. Change from…
recrystallization temperature
Approximate minimum temperature at which complete recrystallization of a cold-worked metal occurs within a specified time.
red hardness
Ability of a cutting tool material to withstand high temperatures at the point of cut without softening and degrading.
refractometer
Optical instrument that measures the refractive index of a liquid, such as a water-diluted metalworking fluid mix. The refractive index can…
refractory metal
Metal having an extremely high melting point; for example, tungsten, molybdenum, tantalum, niobium (columbium), chromium, vanadium and rhen…
relief
Space provided behind the cutting edges to prevent rubbing. Sometimes called primary relief. Secondary relief provides additional space beh…
residual stress
Stress present in a body that is free of external forces or thermal gradients.
reaction injection molding (RIM)
Molding process that allows the rapid molding of liquid materials. The injection-molding process consists of heating and homogenizing plast…
robot
Device capable of performing various combinations of movements, manipulations and actions. Normally computerized but may be electromechanic…
robotics
Discipline involving self-actuating and self-operating devices. Robots frequently imitate human capabilities, including the ability to mani…