The experimental study of low-cycle fatigue of single crystals of heat-resistant Ni-base alloy VGM5 at high temperatures
The experimental data obtained by test results on low cycle fatigue (LCF) single-crystal samples of promising heat-resistant Ni-base alloy VGM5. Challenge mode - the temperature of 850 and 1050 C, the "hard" cycle with controlled deformation in a cycle, f=0.5 Hz, the asymmetry factor cycle R = -1 (850 C) and R = 0 (850 and 1050 C). Numerical model and LCF curves according to the number of cycles to failure Nf the extent of the deformation  in the cycle and a similar dependence for N= Nf/2 from the maximum and minimum stresses max and min. Shows the results of the analysis of the nature of fracture of samples on the basis of which the distinction destruction at temperatures of 850 and 1050 C.