Abstract
A method is devised for conducting thermal fatigue tests of specimens with an annular notch and specially shaped end surfaces. Packets of specimens are cyclically heated and cooled by the injection of hot gas and cold air through their internal cavity. A new design of specimen is proposed and is used as the base specimen in tests performed by the authors. It is shown that, if the heat-transfer conditions are the same for different parts of the specimen, the removal of a small amount of metal from certain sections of the specimen on a lathe changes the components of the maximum nonequilibrium thermal stresses and their proportions within the range from −∞ to +∞. Methods for calculating the thermal and thermal-stress states of specimens are described.
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