| Autor: |
Suneeta Neogi, Jayant Neogi, Ranji Vaidyanathan, Marvln T. Dixie, Jagannathan Sankar |
| Rok vydání: |
1994 |
| Předmět: |
|
| Zdroj: |
Volume 2: Aircraft Engine; Marine; Microturbines and Small Turbomachinery. |
| DOI: |
10.1115/94-gt-397 |
| Popis: |
The effect of thermal soaking on the mechanical properties of a candidate material for advanced heat engine applications namely, hot isostatically pressed (HIPed) silicon nitride (GTEPY6) are reported here. Pure uniaxial tensile tests conducted at room and at elevated temperatures indicated that the tensile strength of this material dropped significantly after 1000°C. The residual tensile strength of PY6 material after thermal soaking at 1200° and 1300°C was also investigated. Test results showed that thermal soaking at 1200° and 1300°C increased the residual tensile strength. The thermal soaking time had a greater effect on the residual tensile strength at 1300°C. Tensile creep tests performed at 1200° and 1300°C showed that the steady state creep rate was influenced by both the temperature and the applied stress. The higher stress exponent in HIPed as compared to a sintered silicon nitride shows higher creep resistance in the case of HIPed materials. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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