Abstract
In order to investigate the relation between one stress cycle and temperature change under stress cycle with mean stress, temperature change have been measured by using computerized temperature measurement system. Under erastic stress range, the temperature changes are agreed well with the thermo-elastic value. But under plastic stress range, the temperature changes are lager than the calculated value. The temperature change under tensile mean stress is smaller than the value under compressive mean stress. This results seems to be come up the tensile stress yielding.
