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Poster De Conférence Année : 2017

Mechanical and oxidation behaviors at high temperature of ZrC-strengthened superalloys

Valentin Kuhn
  • Fonction : Auteur
Jérémy Peultier
  • Fonction : Auteur
Safa Tlili
  • Fonction : Auteur
Patrice Berthod
Mélissa Ritouet
  • Fonction : Auteur

Résumé

Zirconium can be used as carbide-former element to promote strengthening by MC carbides in refractory alloys elaborated by casting. This type of carbides, for example represented by the TaC ones, often appears as very imbricated with matrix in an interdendritic eutectic compound. Furthermore such carbides are generally very stable at high temperature. Consequently, MC carbides may be especially efficient for the mechanical strengthening of alloys, allowing them to resist creep deformation at high temperature. Developed from an element more often introduced in alloys for trapping impurities (e.g. sulfur), ZrC are not or rarely considered for combatting high temperature creep, and the purpose of this work is to test them in refractory cobalt-based, iron-based and nickel-based alloys issued from foundry process. Several Co-based, Fe-based and Ni-based alloys of the {M-25Cr-xC-yZr}-type (x=0.25 with y=1.9, and x=0.50 with y=3.8, in wt.%) were synthesized by high frequency induction melting under inert atmosphere. The obtained ingots were cut to obtain parts for the metallographic characterization of the as-cast microstructures, for Differential Thermal Analysis for specifying their melting range, for {1200°C, 20MPa}-flexural creep tests and for oxidation thermogravimetry tests in air at 1200°C.
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Dates et versions

hal-03235578 , version 1 (25-05-2021)

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  • HAL Id : hal-03235578 , version 1

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Valentin Kuhn, Jérémy Peultier, Safa Tlili, Patrice Berthod, Mélissa Ritouet. Mechanical and oxidation behaviors at high temperature of ZrC-strengthened superalloys. Asian Advanced Materials Congress, Mar 2017, Singapour, Singapore. ⟨hal-03235578⟩
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