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The Role of Interfaces in Ni-Base Superalloys
1968A 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 +2 more
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The Anodic Dissolution of a Ni-Base Superalloy
Corrosion, 1983A 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 +3 more
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Relation between the microstructure and microchemistry in Ni‐based superalloy
Surface and Interface Analysis, 2012Ni‐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 +5 more
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Thermal cycle simulation of a Ni-base superalloy
Scripta Materialia, 1996Abstract Thermal cycle simulation techniques have been investigated as a method of studying the effect of cooling rate, from sub-solvus solution heat treatment temperatures, on the microstructure and fatigue properties of Ni-based superalloy specimens. A Smitweld thermal cycle simulator (TCS) and a Gleeble 1500 TCS were used during the investigation.
N.E. Glover, C.L. Davis
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Combined Cycle Fatigue of Ni-Base Superalloy
Key Engineering Materials, 2011Fatigue life of a cast Ni-base superalloy IN 713LC under combined cycle loading consisting of a superposition of low- and high-cycle fatigue at 800 °C was experimentally determined. No measurable effect of combined cycle was found for studied loading conditions.
Ludvík Kunz +2 more
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Phase Transformation and Segregation to Lattice Defects in Ni-Base Superalloys
Microscopy and Microanalysis, 2007Nanostructural features of nickel-base superalloys as revealed by atom probe field ion microscopy (APFIM) and atom probe tomography (APT) are reviewed. The more salient information provided by these techniques is discussed through an almost exhaustive analysis of literature over the last 30 years.
Blavette, Didier +4 more
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An investigation on notch embrittlement of a Ni-base superalloy
Scripta Metallurgica et Materialia, 1995Superalloy 718, which is strengthened by {gamma}{prime} and {gamma}{double_prime} precipitates, is one of the most widely used nickel based superalloys for high temperature applications. The alloy also contains incoherent delta phase and MC type of carbides, and in rare cases the Laves phase and minor phases like borides.
S. Srinivas +3 more
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