THERMOCOUPLE. A device for measuring temperatures, consisting of lengths of two dissimilar metals or alloys that are electrically joined at one end and connected to a voltage-measuring instrument at the other end. When one junction is hotter than the other, a thermal electromotive force is produced that is roughly proportional to the difference in temperature between the hot and cold junctions.
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SUPERHEATING. Heating above the temperature at which an equilibrium phase transformation should occur without actually obtaining the transformation.
STRAIN. A measure of the relative change in the size or shape of a body. Linear strain is the change per unit length […]
ULTIMATE STRENGTH. The maximum conventional stress (tensile, compressive or shear) that a material can withstand.
THERMAL STRESS. Stresses in metal resulting from non-uniform temperature distribution.