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The Image Analyses Utilization at Nickel-base Superalloy Degradation Classification

By Veronika Řičánková

Abstract

During operational conditions of internal combustion turbines of turbojet engines, the impeller blades are stressed by load cycles which vary in time, temperature and stress. In the course of operation, the blades are exposed to a considerable number of degradation effects, particularly high-temperature corrosion, fatigue processes and creep. The presented work is aimed at the study of the structure cast nickel-base superalloy INCONEL 713 LC, creep tests exposured. The structural changes (degradation) was clasifikation by the help of image analyses. Operational conditions of heat parts, used in gas turbines and turbo-compressors, were simulated by creep tests of Inconel 713 LC nickel superalloy during a constant load of temperatures ranging from 750 up to 950C. Changes in the structure dependent upon time, temperature and stress applied were analysed by means of light and electron microscopy methods and image analyses after the fracture of test bars

Topics: Inconel 713 LC; high temperature creep; Lité niklové superslitiny; vysokoteplotní creep; obrazová analýza.; image analyses.; Cast nickel superalloys; light and electron microscopy; světelná a elektronová mikroskopie
Publisher: Vysoké učení technické v Brně. Fakulta strojního inženýrství
Year: 2008
OAI identifier: oai:invenio.nusl.cz:228333
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