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In this paper there are offered calculated and experimental methods of simulating the high-speed modes of induction heating and designing the new inductor to provide the preset nonuniform thermal and thermostress state for cooled and uncooled blades of gas-turbine engine by changing the inductor width (specific power of induction heating). The peculiarity of this technique is the possibility of conducting the thermal cyclic tests of gas-turbine-engine parts with remaining the guaranteed minimal constant clearance between inductor and blade surface that reduces the probability of temperature-field distortion in changing the blades and promotes the efficiency enhancement of induction heating. Obtained results were used to conduct the tests of blades of gas-turbine-engine turbine. Carried out tests at this set with using the high-speed modes of induction heating helped to reveal quickly required changes in the blade structure.

The paper reports a method for calculating creep limits. It presents results of the processing of experimental data obtained by different scientists on creep rupture under uniaxial tension. As a time approximation at the moment of fracture, a fractional power-law dependence with four material parameters is used, two of the parameters having a physical meaning of creep limits. The material parameters of the materials are computed from the condition of the minimum total discrepancies of the approximating values relative to the corresponding experimental data. Cannes, 1981, Pergamon Press, Oxford, United Kingdom, 1982, vol. 3, pp. 1285-1293 Mozharovskaya T.N. Stress-rupture strength and creep criteria for metallic materials with a complex stressed state. Keywords