Thermo-physical properties of Hastelloy X and Haynes 214 close to the melting range |
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| Authors: | Sonun Ulan kyzy Rainer Völkl Oliver Munz Tim Fischer Sarah Welzenbach |
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| Affiliation: | 1. Metals and Alloys, University Bayreuth, Bayreuth, Germany;2. Institute of Thermal Turbomachinery, Karlsruhe Institute of Technology, Karlsruhe, Germany;3. Institute of Materials Science and Mechanics of Materials, Technical University of Munich, Munich, Germany |
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| Abstract: | ABSTRACT The nickel-based superalloys Hastelloy X and Haynes 214 are widely used for honeycomb liners; however, thermo-physical properties at temperatures close to the melting range are poorly described in the literature. Based on the thermo-physical properties, endothermic effects between 550°C and 650°C have been observed that develop due to the formation of the short-range order in both alloys and in Haynes 214, in addition to the short-range order, an increase in the specific heat capacity due to the γ′-precipitation up to 950° was detected. At low and intermediate temperatures, the Hastelloy X is significantly better suited than the Haynes 214. At high temperatures the Haynes 214 is superior to the Hastelloy X due to the dissolution of the γ′-phase. |
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| Keywords: | Nickel-based superalloys thermo-physical properties Hastelloy X Haynes 214 abradable sealing honeycomb liners rub-in gas turbines |
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