Results 201 to 210 of about 14,532 (243)
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A thermodynamic database for Ni‐base superalloys
Scandinavian Journal of Metallurgy, 2001A thermodynamic database has been developed for Ni‐base superalloys. Following the CALPHAD procedure, it is based on the assessment of thermodynamic behaviour of the relevant constituting sub‐systems of the complex system of interest. The current database contains 7 elements: Al, Co, Cr, Ni, Ti, W, Re.
N. Dupin, B. Sundman
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1999
Computer models for designing Ni-base superalloys have been developed. A mathematical model using regression equations based on microstructure and property databases has been established and successfully applied to alloy developments. Several types of Ni-base superalloys including new generation single crystal (SC) superalloys have been designed using ...
Hiroshi Harada, Hideyuki Murakami
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Computer models for designing Ni-base superalloys have been developed. A mathematical model using regression equations based on microstructure and property databases has been established and successfully applied to alloy developments. Several types of Ni-base superalloys including new generation single crystal (SC) superalloys have been designed using ...
Hiroshi Harada, Hideyuki Murakami
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Ageing kinetics of Ni-base superalloys
Materials at High Temperatures, 2016In the present work, the degradation of the γ/γ′ microstructure of single crystal Ni-base superalloy, CMSX-8, has been studied experimentally and computationally. Two microstructure evolution processes, referred to as rafting and coarsening, have been decoupled and investigated independently.
Sanam Gorgannejad +2 more
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Hydrogen Embrittlement of Ni-Based Superalloys
CORROSION 1995, 1995Abstract The hydrogen embrittlement properties of some nickel based superalloys such as C-22, C-276, G-30 and Alloy 625 were studied. The alloys were studied for their susceptibility in annealed, cold worked and aged conditions. The degradation in mechanical properties were evaluated by slow strain rate testing.
Vimal H. Desai, Kirk Scammon
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Laser Cladding of Ni-Based Superalloys
2020Laser cladding of Ni-based superalloys has been studied extensively in the recent past owing to their combined properties of high strength and corrosion resistance at elevated temperatures, due to which they are finding wide applications in gas turbine engines, land-based power-generation gas turbines, nuclear and fossil fuel power plants, etc.
Gopinath Muvvala +2 more
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On phase transformations in a Ni-based superalloy
Philosophical Magazine, 2013In this study, a particular nickel-based superalloy has been studied by transmission electron microscopy and the results are discussed in terms of phase transformations that may have taken place. The alloy has been found to consist of three major phases; a FCC γ phase containing a random distribution of nearly spherical γ′ – Ni3Al(Ti) – precipitates ...
Sirous Asgari +3 more
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Hydride formation in a Ni-base superalloy
Metallurgical Transactions A, 1981X-ray diffraction, optical- and scanning-electron metallographic and microhardness studies have been conducted in pure Ni and a Ni-base alloy (HASTELLOY Alloy C-276) in an effort to determine if hydrides form in the alloy during cathodic charging in the presence of a strong H-recombination poison. The studies indicate that hydrides do form and that the
Ellina Lunarska-Borowiecka +1 more
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On the Temperature Limits of Ni-Based Superalloys
2020The peculiar atomic structure of γ′ precipitates [Ni3(Al/Ti)-L12] in Ni-based superalloys produces high-energy faults when dislocations glide them, giving their significant strength at high temperatures. The mechanisms behind the strength failure of these alloys above 800 °C are still controversial.
Daniel Barba +5 more
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Thermal characterization of a Ni-based superalloy
Thermochimica Acta, 2002Abstract Ni-based superalloys are usually employed in industrial applications where good mechanical performance, corrosion and oxidation resistance at high temperatures is required. Samples collected from a gas turbine rotor blade were used in the present study.
John H Suwardie +2 more
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Melt spinning Ni-based superalloys
Metals Technology, 1983AbstractThe data relating to the production of tapes by chill-block melt spinning of a Ni-based crystalline superalloy (API) are compared with those presented by previous workers for amorphous and low-melting-point crystalline alloys. Comparisons based on fitting the data to established equations shed light upon the physical significance of the ...
S. J. Piggs, J. A. Charles
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