Results 131 to 140 of about 9,420 (187)
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2016
Nickel-based superalloys are an exceptional class of structural materials for high temperature applications, particularly in the challenging environment of the turbine sections of aircraft engines. Continued improvements in the properties of these materials have been possible through close control of chemistry and microstructure as well as the ...
D. V. V. Satyanarayana, N. Eswara Prasad
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Nickel-based superalloys are an exceptional class of structural materials for high temperature applications, particularly in the challenging environment of the turbine sections of aircraft engines. Continued improvements in the properties of these materials have been possible through close control of chemistry and microstructure as well as the ...
D. V. V. Satyanarayana, N. Eswara Prasad
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Advances in Engineering Technology Research, 2023
Due to the excellent properties of nickel-based superalloys, it is often widely used in aircraft engines, petroleum, chemical and nuclear energy. However, the use of nickel-based superalloys in petrochemical industry is usually accompanied by hydrogen embrittlement, which will lead to a decrease in its mechanical properties.
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Due to the excellent properties of nickel-based superalloys, it is often widely used in aircraft engines, petroleum, chemical and nuclear energy. However, the use of nickel-based superalloys in petrochemical industry is usually accompanied by hydrogen embrittlement, which will lead to a decrease in its mechanical properties.
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An automated segmentation for nickel-based superalloy
2008 15th IEEE International Conference on Image Processing, 2008We investigate the automated segmentation of microstructures of a nickel-based superalloy using digital microscopy data. We study the combination of a region merging segmentation method called the stabilized inverse diffusion equation (SIDE), and a stochastic segmentation method, the expectation-maximization/maximization of the posterior marginals (EM ...
Hsiao-Chiang Chuang +4 more
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The recrystallization of nickel-base superalloys
Journal of Materials Science, 1981The effects of recrystallization on the γ′ distribution in four nickel-base superalloys of varying γ′ volume fraction (Nimonics PE16, 80A and 115, and Udimet 720) have been studied by transmission electron microscopy. These effects are explained in terms of high solubility and diffusivity in the recrystallization interface, and it is suggested that ...
A. Porter, B. Ralph
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2018
The reason that vast numbers of people fly these days is because flying is relatively inexpensive. Once the aircraft has been paid for, the big operating cost for airlines is the cost of the fuel, and fuel efficiency has increased by over 45% since the 1940s.
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The reason that vast numbers of people fly these days is because flying is relatively inexpensive. Once the aircraft has been paid for, the big operating cost for airlines is the cost of the fuel, and fuel efficiency has increased by over 45% since the 1940s.
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The Structure of the γ′-Phase in Nickel-Base Superalloys
Advances in X-ray Analysis, 1965AbstractPresent day nickel-base superalloys are hardened in part by the precipitation of a phase which has variously been identified as Ni3Al, Ni3(Al, Ti) and γ′. X-ray diffraction techniques which include precision lattice parameter measurements, intensity measurements, and phase identification are used to define the structural and chemical ...
S. Rosen, P. G. Sprang
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On the Hydrostatic Extrusion of Nickel-Base Superalloys
Canadian Metallurgical Quarterly, 1980AbstractPublished data on the hydrostatic extrusion behaviour of nickel-base superalloys are examined critically. Experimental results are presented which confirm that extrusion pressures are dependent on the mechanical properties of the materials, and can therefore be affected by microstructure.
A.K. Kandeil +3 more
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1971
The so-called nickel-base superalloys or high-strength high-temperature alloys are, in general, modifications of the corrosion- and heat-resisting alloys of the types discussed in Chapters 3 and 4. Their improved strength and creep resistance at elevated temperatures have been developed by including elements which will produce a stable hard phase or ...
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The so-called nickel-base superalloys or high-strength high-temperature alloys are, in general, modifications of the corrosion- and heat-resisting alloys of the types discussed in Chapters 3 and 4. Their improved strength and creep resistance at elevated temperatures have been developed by including elements which will produce a stable hard phase or ...
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Defects in Nickel-Base Superalloys
JOM, 1987In the sixty years since age-hard-enable, nickel-base superalloys were first identified, the compositional and microstructural features of these high-performance metals have changed markedly—from the early Nimonic (INCO trade name) 80A (a wrought alloy of essentially four elements) to today’s family of wrought from ingot, powder metal, cast and ...
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Aluminide Coatings for Nickel Based Superalloys
Surface Engineering, 2004A number of aluminide coatings have been developed which are modified by additional elements (noble metals, Cr and reactive elements such as Y and Hf). This results in a marked improvement in their corrosion resistance. In the present paper, aluminide coatings are reviewed. The hot corrosion and oxidation resistance of these coatings in laboratory and
M.R. Khajavi, M.H. Shariat, A. Pasha
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