Thermo-physical properties of Hastelloy X and Haynes 214 close to the melting range

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.

KEYWORDS:

• Nickel-based superalloys
• thermo-physical properties
• Hastelloy X
• Haynes 214
• abradable sealing
• honeycomb liners
• rub-in
• gas turbines

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The Deutsche Forschungsgemeinschaft (DFG) financially supported the research for this paper and it is a part of the research project GL181/40-1.