|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Late News Poster Session
||NOW ON-DEMAND ONLY - A-26: Microstructural Analysis of the Casting Defects in the Low Pressure Turbine Blades
||Rafal Cygan, Łukasz Rakoczy, Mirosław Antosz, Dorota Wyrobek, Tomasz Szczęch
|On-Site Speaker (Planned)
The production of high-quality turbine blades from Ni-based superalloys poses a challenging problem for the aerospace industry. The occurrence of defects in the final component has become more common with the increasing complexity of the blades. In parallel, superalloy development has improved the service capabilities of these parts, but these new generation superalloys have encountered more casting difficulties. This work presents selected results of the analysis of casting defects detected in a low-pressure turbine blade. To identify the source of their occurrence, non-destructive tests, light microscopy, scanning electron microscopy, and X-ray dispersion spectroscopy experiments were carried out. On the basis of the conducted research, it was found that the main reason for the occurrence of casting defects was the local segregation of Al and Ti and the oxidation of the superalloy during the casting. This is indicated by the complex morphology of numerous precipitates and their high enrichment in oxygen.
||Copper / Nickel / Cobalt, Characterization, Solidification