Results 181 to 190 of about 24,153,524 (223)

Thermophysical Properties of Ni-Based Superalloys

2022
Simulation of casting and joining processes and experimental planning are closely related to liquid metallic materials' thermophysical properties. Thermophysical properties datasets of Ni-based industrial alloys were analyzed through the application of experimental methods and theoretical models.
Novakovic R, Giuranno D, Mohr M, Brillo J, Fecht HJ   +4 more
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A thermodynamic database for Ni‐base superalloys

Scandinavian Journal of Metallurgy, 2001
A 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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Ageing kinetics of Ni-base superalloys

Materials at High Temperatures, 2016
In 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, Ernesto A. Estrada Rodas, Richard W. Neu.   +2 more
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On phase transformations in a Ni-based superalloy

Philosophical Magazine, 2013
In 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, Reza Sharghi-Moshtaghin, Mehdi SadeghAhmadi, Pirouz Pirouz   +3 more
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On the Temperature Limits of Ni-Based Superalloys

2020
The 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, Ashton Egan, Steve Kench, Tim M. Smith, Michael J. Mills, Roger C. Reed   +5 more
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Ni-based superalloys for turbine discs

JOM, 1999
Superalloys have been developed for specific, specialized properties and applications. One of the main applications for nickel-based superalloys is gas-turbine-engine disc components for land-based power generation and aircraft propulsion. Turbine engines create harsh environments for materials due to the high operating temperatures and stress levels ...
David Furrer, Hans Fecht
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Thermal characterization of a Ni-based superalloy

Thermochimica Acta, 2002
Abstract 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, Ramon Artiaga, Jose L Mier   +2 more
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The Anodic Dissolution of a Ni-Base Superalloy

Corrosion, 1983
A single phase nickel base superalloy, HASTELLOY(1) Alloy C-276, was anodically polarized in 0.5 N NaCl at 70 C, and the concentrations of metal-ion complexes in solution were determined. Relative dissolution rates of alloying elements were obtained and selectivity coefficients were calculated.
M. A. Cavanaugh, J. A. Kargol, J. Nickerson, N. F. Fiore   +3 more
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The Role of Interfaces in Ni-Base Superalloys

1968
A typical commercial Ni-base superalloy consists of a coherent precipitate of γ′ (basically Ni3(Al,Ti)) in a matrix of γ (Ni-solid solution), interspersed with minor carbides and eutectics. It contains, therefore, three types of interfaces; (1) grain boundaries, (2) coherent phase boundaries γ/γ′ and (3) incoherent phase boundaries γ + γ′Vcarbide.
S. M. Copley, B. H. Kear, F. L. VerSnyder   +2 more
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Relation between the microstructure and microchemistry in Ni‐based superalloy

Surface and Interface Analysis, 2012
Ni‐based superalloys with biphasic structure (γ + γ′) are widely used for high‐temperature applications, such as disks and blades of gas turbines and aeronautical engines. For these applications, the stability at high temperature is of utmost importance, in particular the coarsening and the morphological changes of γ′ may be seriously detrimental for ...
Kaciulis S, Mezzi A, Amati M, Montanari R, Angella G, Maldini M   +5 more
openaire   +2 more sources