Effect of Long-Term Aging on the Evolution of γ' and TCP Phases of a Ni3Al Based Single Crystal Superalloy
| Autor: | Xin Zhou, Sheng Kai Gong, Jie Xiao, Yan Ling Pei, Shu Suo Li |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Materials science
Precipitation (chemistry) Mechanical Engineering Metallurgy Thermodynamics 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences 0104 chemical sciences law.invention Superalloy Mechanics of Materials law Phase (matter) Thermal Volume fraction General Materials Science Electron microscope 0210 nano-technology Single crystal superalloy |
| Zdroj: | Materials Science Forum. 849:482-487 |
| ISSN: | 1662-9752 |
| Popis: | The coarsening behavior of γ' phase and precipitation behavior of TCP phase in a Ni3Al based single crystal superalloy were investigated by experimental and calculation. The Re-containing and Mo-rich single crystal superalloy used in this study exhibit good high-temperature strength and oxidation resistance. After fully heat-treated, the experimental superalloys were aged at 1050°C and 1150°C for different time periods from 50h to 1000h. The microstructure after thermal exposure was examined by field emission-scanning electron microscopy (FE-SEM). The results indicated that the coarsening behavior of γ' phase agrees well with the typical Lifshitz-Slyozov-Wagner (LSW) theory. After thermal exposure, both the size and the volume fraction of the TCP phase changed perceptibly. |
| Databáze: | OpenAIRE |
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