Thermo-physical properties of Hastelloy X and Haynes 214 close to the melting range. Issue 10 (2nd July 2020)

• Record Type: Journal Article
• Authors: Ulan kyzy, Sonun; Völkl, Rainer; Munz, Oliver; Fischer, Tim; Welzenbach, Sarah; Glatzel, Uwe
• Is Part Of: Materials science and technology. Volume 36:Issue 10(2020)
• Page Start: 1012
• Page End: 1019
• Publication Date: 2020-07-02
• Subjects: Nickel-based superalloys -- thermo-physical properties -- Hastelloy X -- Haynes 214 -- abradable sealing -- honeycomb liners -- rub-in -- gas turbines; Materials science -- Periodicals; Microstructure -- Periodicals; Metallurgy -- Periodicals; 620.1105
• DOI: 10.1080/02670836.2020.1753154
• Languages: English
• ISSNs: 0267-0836

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.