HIGH TEMPERATURE CHARACTERISTICS OF ZIRCONIUM CARBIDES-STRENGTHENED COBALT-BASED AND IRON-BASED ALLOYS SPECIFIED USING DIFFERENT THERMAL ANALYSIS METHODS - Archive ouverte HAL Accéder directement au contenu
Poster De Conférence Année : 2017

HIGH TEMPERATURE CHARACTERISTICS OF ZIRCONIUM CARBIDES-STRENGTHENED COBALT-BASED AND IRON-BASED ALLOYS SPECIFIED USING DIFFERENT THERMAL ANALYSIS METHODS

Résumé

Some of the conventionally cast alloys based on cobalt or on iron can be potentially very interesting high temperature materials. Their strengthening by interdendritic carbides morphologically favourable and stable enough at elevated temperature may allow them challenging gamma/gamma prime nickel-based single crystals for applications at temperatures exceeding 1100°C. Such carbides may be MC-types ones, for example TaC, HfC or ZrC. This is this last carbide which was under interest in this work. Four 25wt.%Cr-containing alloys, two based on cobalt and containing (0.25C,1.9Zr) or (0.50C, 3.8Zr) and two other containing the same chromium, carbon and zirconium quantities but based on iron, were elaborated by foundry. Parts were exposed to 1200°C and the as-cast and aged microstructures were characterized. In parallel the four alloys were also subjected to DTA (differential thermal analysis) to specify their solidus and liquidus temperatures when possible. In parallel again calculations were carried out with Thermo-Calc N to help understanding the microstructure formation during cooling from the liquid state and to know the theoretical melting ranges and stable microstructures at 1200°C.
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Dates et versions

hal-03229273 , version 1 (18-05-2021)

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  • HAL Id : hal-03229273 , version 1

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Jérémy Peultier, Valentin Kuhn, Patrice Berthod, Mélissa Ritouet-Léglise, Thierry Schweitzer, et al.. HIGH TEMPERATURE CHARACTERISTICS OF ZIRCONIUM CARBIDES-STRENGTHENED COBALT-BASED AND IRON-BASED ALLOYS SPECIFIED USING DIFFERENT THERMAL ANALYSIS METHODS. 1st Journal of Thermal Analysis and Calorimetry Conference, Jun 2017, Budapest, Hungary. ⟨hal-03229273⟩
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