Influence of the M and M’ Metals on the Carbides Population in AsCast M’-based Alloys Designed to be MC-Strengthened

Patrice Berthod (University of Lorraine, Institut Jean Lamour, Campus Artem, 2 Allée André Guinier 54000 Nancy, France)

Article ID: 604



High temperature applications such as turbine blades for aeronautics or molten glass-shaping tools require the use of refractory metallic materials. Among the later ones, cast superalloys based on some transition metals and reinforced by MC carbides stay in good place and their metallurgy merits to be well known. This work consists in a general exploration of the as-cast microstructures which can be obtained after solidification and solid state cooling down to ambient temperature for a wide series of alloys for which the base element and the MC-former element both vary. For fixed contents in chromium and carbon contents, the compositions of a total of nineteen alloys were considered. These alloys are based on Ni, Co, Fe or Nb and the M content was each time chosen to favor the appearance of TiC, TaC, NbC, HfC or ZrC, as single carbide in a given alloy. After elaboration, metallographic samples were observed by electron microscopy to investigate the obtained microstructures. The obtained results show first that the MC carbides were in many cases successfully obtained at the expense of other possible carbides (for all Co-based alloys for example) but there are also several exceptions (notably for some Ni-based alloys). Second, the obtained monocarbides have a eutectic origin and they are script-liked shaped. However they are here too some exceptions, as the rare HfC obtained in a Nb-base). In general, the results obtained in this work show that the principle of dendritic matrix combined with MC carbides with a script-like morphology is not necessarily obtained: the nature of the {base element, MC-former element} combination governs the microstructure of the alloy in its as-cast state for these particular  compositions in chromium and carbon. In some cases other carbides may appear and the microstructures may be even of another type.


Cast refractory alloys;MC carbides;As-cast microstructures;Base element;Monocarbides-former elements

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[1] Chester T. Sims, Norman S. Stoloff, William C. Hagel “Superalloys II. High Temperature materials for aerospace and industrial power” John Wiley & Sons, 1987.

[2] Art Kracke “Superalloys, the most successful alloy system of modern times – Past, Present and Future”, in Proceedings of the 7th International Symposium on Superalloy 718 and Derivatives (Edited by: E. A. Ott, J. R. Groth, A. Banik, I. Dempster, T. P. Gabb, R. Helmink, X. Liu, A. Mitchell, G. P. Sjöberg and A. Wusatowska-Sarneck), TMS (The Minerals, Metals & Materials Society), 2010.

[3] Chester T. Sims, William C. Hagel “The Superalloys-Vital High Temperature Gas Turbine Materials for Aerospace and Industrial Power” John Wiley & Sons, New York, 1972.

[4] William Eisen, “Powder Metallurgy Superalloys”, Materials World, 1996, 4: 22-24.

[5] B. Paintendre, Y. Bienvenu, C. Ducrocq, J. C. Lautridou, J. H. Davidson, O. Faral “The influence of gamma prime forming elements on the properties of a nickel base superalloy produced by powder metallurgy” in the Proceedings of the “High Temperature Alloys for Gas Turbines and Other Applications 1986” Conference, Part I (Edited by W. Betz, R. Brunetaud, D. Coutsouradis, H. Fischmeister, T. B. Gibbons, I. Kvernes, Y. Lindblom, J. B. Marriott and D. B. Meadowcroft) Liège, Belgium, 1986: 867-876,

[6] Dedou Chen, Shuyue Wei, Zhontang Wu, Yafang Han “The creep behaviour of a nickel-base single crystal superalloy” in the Proceedings of the “High Temperature Alloys for Gas Turbines and Other Applications 1986” Conference, Part I (Edited by W. Betz, R. Brunetaud, D. Coutsouradis, H. Fischmeister, T. B. Gibbons, I. Kvernes, Y. Lindblom, J. B. Marriott and D. B. Meadowcroft) Liège, Belgium, 1986: 1441-1450.

[7] Matthew J. Donachie, Stephen J. Donachie “Superalloys: A Technical Guide” (2nd edition), ASM International, Materials Park, 2002.

[8] Benjamin Graybill, Ming Li, David Malawey, Chao Ma, Juan-Manuel Alvarado-Orozco, Enrique Martinez-Franco “Additive Manufacturing of nickel-based superalloys” in Proceedings of the ASME 2018 13th International Manufacturing Science and Engineering Conference MSEC2018, College Station, TX, USA, 2018: 1-17.

[9] Apoorv Kulkarni “Additive Manusfacturing of Nickel Based Superalloys”: 1-12.

[10] G. Lamanthe, J. M. Theret, W. J. Boesch, G. E. Maurer “UDM 56: a new nickel base equiaxed superalloy”, in the Proceedings of the “High Temperature Alloys for Gas Turbines and Other Applications 1986” Conference, Part I (Edited by W. Betz, R. Brunetaud, D. Coutsouradis, H. Fischmeister, T. B. Gibbons, I. Kvernes, Y. Lindblom, J. B. Marriott and D. B. Meadowcroft) Liège, Belgium, 1986: 965-978.

[11] Elihu F. Bradley, “Superalloys: A Technical Guide” (1st edition), ASM International, Metals Park (1988).

[12] P. Berthod, J.-L. Bernard, C. Liébaut “Cobalt-chromium alloy for spinner cups in manufacture of mineral wool from silicate glass”, International Patent, PCT Int. Appl, 2001: WO 2001090429 A1 20011129.

[13] S. H. Chang, C. C. Ko “Effects of MC carbide precipitates on the microstructure and mechanical properties of cobalt-based alloys adding TiC powder via vacuum sintering process”, Materials Transactions, 2013, 54(10): 399-404.

[14] S. H. Chang, C. C. Ko “Characterization of the MC carbides and mechanical properties in a TiC particles-strengthened cobalt-based alloy through HIP, solid-solution and aging treatments”, Materials Transactions, 2013, 54(3): 2049-2054.

[15] K. Nakama, K. Sugita, Y. Shirai “Effect of MC Type Carbides on Age Hardness and Thermal Expansion of Fe-36 wt%Ni-0.2 wt%C Alloy”, Metallography, Microstructure, and Analysis, 2013, 2(6): 383-387.

[16] W. Wang, R. Wang, A. Dong, G. Zhu, D. Wang, W. Zhou, W. Pan, D. Shu, B. Sun “Creep behaviors of MC carbide reinforced nickel based composite”, Materials Science & Engineering, A: Structural Materials: Properties, Microstructure and Processing, , 2019, 756: 11-17.

[17] W. Wang, G. Zhu, R. Wang, D. Wang, W. Pan, W. Zhou, D. Du, A. Dong, D. Shu, B. Sun “Novel in situ synthesized carbide reinforced Ni base composite for structural castings with high creep resistance”, Materials & Design, Ahead of Print, 2019.

[18] N. N. Guo, L. Wang, L. S. Luo, X; Z. Li, R. R. Chen, Y. Q. Su, J. J. Guo, H. Z. Fu “Microstructure and mechanical properties of in-situ MC-carbide particulates-reinforced refractory high-entropy Mo0.5NbHf0.5ZrTi matrix alloy composite”, Intermetallics, 2016, 69: 74-77.

[19] S. R. Shatynski “The thermochemistry of transition metal carbides”, Oxidation of Metals, 1979, 13(2): 105–118.

[20] P. Berthod “High temperature properties of several chromium-containing Co-based alloys reinforced by different types of MC carbides (M= Ta, Nb, Hf and/ or Zr)”, Journal of Alloys and Compounds, 2009, 481: 746-754.

[21] P. Berthod, E. Conrath “Creep and oxidation kinetics at 1100 °C of nickel-base alloys reinforced by hafnium carbides”, Materials and Design, 2016, 104: 27- 36.

[22] E. Conrath, P. Berthod “Microstructure evolution at high temperature of chromium-rich iron-based alloys containing hafnium carbides”, International Journal of Materials Research (formerly: Zeitschrift für Metallkunde), 105(8): 717-724.

[23] P. Berthod, E. Kretz, F. Allègre “Experimental and thermodynamic study of the role of titanium in the microstructural and thermal properties of cast Ni– Cr–C–Ti alloys”, Calphad, 2017, 56: 41-48.

[24] P. Berthod, M. Ritouet-Léglise “Microstructures and hardness of model niobium- based chromium-rich cast alloys”, Advances in Materials Research, 2018, 7(1): 17-28.

[25] P. Berthod, M. Khair “Thermodynamic and experimental study of cobalt-based alloys designed to contain TiC carbides”, Calphad, 2019, 65: 34-41.

[26] J.-L. Bernard, P. Berthod, L. Héricher, C. Liébaut, S. Michon “Refractory alloy, fiber-forming plate, and method for producing mineral wool”, International Patent, PCT Int. Appl, 2009: WO 2009071847 A1 20090611.

[27] P. Berthod, E. Conrath “Mechanical and Chemical Properties at High Temperature of {M-25Cr}-based Alloys Containing Hafnium Carbides (M=Co, Ni or Fe) Creep Behavior and Oxidation at 1200°C” Journal of Material Science and Technology Research, 2014, 1: 7-14.

[28] S. Michon, P. Berthod, L. Aranda, C. Rapin, R. Podor, P. Steinmetz “Application of thermodynamic calculations to study high temperature behavior of TaC-strengthened Co-base superalloys”, Calphad, 2003, 27: 289-294.

[29] P. Berthod, Y. Hamini, L. Aranda, L. Héricher “Experimental and thermodynamic study of tantalum-containing iron-based alloys reinforced by carbides : Part I – Case of (Fe,Cr)-based ferritic steels”, Calphad, 31: 351-360.

[30] P. Berthod, Mélissa Ritouet-Léglise.“Microstructure” and hardness of model niobium-based chromium-rich cast alloys, Advances in Materials Research, 2018, 7(1): 17-28.


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