ANALYTICAL EVALUATION OF THE KINETICS OF PORE REMOVAL IN CAST TURBINE BLADES UNDER HOT ISOSTATIC PRESSING

摘要

The method of scanning electron microscopy is used to study the structure of refractory alloy ZhSBU-VI forming in the process of hot isostatic pressing. The stress-strain state of the metal is analyzed in the zone of a spherical pore in an approximation of the solution to the Lame problem for a void thick-wall sphere under the action of external hydrostatic pressure. An analytical dependence of the creep rate of the refractory alloy on the temperature-and-force parameters of the loading is used to perform a kinetic evaluation of the process of densification of turbine blade castings due to hot isostatic pressing.