|About this Abstract
|2023 TMS Annual Meeting & Exhibition
|Late News Poster Session
|N-28: Microstructure Evaluation of the Turbine High Pressure HPT Aircraft Engine Rotor Blades with Internal Channels Reproduced by Monolithic Cores
|Dorota Wyrobek, Rafał Cygan
|On-Site Speaker (Planned)
Precision castings of the HPT turbine rotor blades with internal cooling channels are designed to operate under extreme operating conditions. Internal channels were mapped using ceramic cores. The core material was characterized by high mechanical strength while maintaining low shrinkage of firing, high apparent porosity and also showed a low coefficient of thermal expansion. Experiments were performed using various technological parameters. Observations of the microstructure were made on samples cross-sections of blades placed in the central part of the casting. Metallographic specimens were made using standard methods according to ASTM E3. Observations were carried out in the state unetched and etched with Marble reagent, using a scanning electron microscope, detector of backscattered electrons. The analysis of the chemical composition was performed by X-ray energy dispersion spectroscopy (EDS). In order to determine the core effect on liquid alloy C101, microstructure studies were performed in near-surface areas of the blade cooling channel.
|Ceramics, Characterization, High-Temperature Materials