Results 171 to 180 of about 10,456 (224)

Interface dislocations in superalloy single crystals

Acta Materialia, 1999
The overall stress state in [gamma]-channels of [gamma]/[gamma][prime]-microstructures has three components misfit stresses (due to [gamma]/[gamma][prime]-misfit), dislocation stress fields and the external stress. In the present study glide and climb forces on [gamma]-channel dislocations (from one slip system a[sub 0]/2[01[bar 1]](111)) are studied ...
M. Probst-Hein, A. Dlouhy, G. Eggeler
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Microsegregation Behavior of Single Crystal Superalloy

Advanced Materials Research, 2014
The major advancements in some mechanical properties of single crystal superalloys can be attributed to the carbon addition. The present study investigated the effect of carbon addition levels on the microsegregation behavior of single crystal superalloys.
Zhu Huan Yu, Jun Feng Qiang
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Fatigue in Single Crystal Nickel Superalloys

1991
Abstract : This program investigates the seemingly unusual behavior of single crystal airfoil materials. The fatigue initiation processes in single crystal (SC) materials are significantly more complicated and involved than fatigue initiation and subsequent behavior of a (single) macrocrack in conventional, isotropic, materials.
Charles Annis, Daniel P. DeLuca
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Linear Friction Welding of a Single Crystal Superalloy

Materials Science Forum, 2012
The effect of forging pressure on linear friction welding (LFW) behaviour of a single crystal Ni-based superalloy was investigated. Crystal orientations of the specimens were controlled and results indicated that welding success is dependent on proximity of the oscillation direction to the <011> direction.
Wanjara, P., Dalgaard, E., Gholipour, J., Larose, J.   +3 more
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Creep deformation modelling of superalloy single crystals

Acta Materialia, 2000
Abstract A model of creep deformation in arbitrarily oriented nickel-base superalloy single crystals has been developed. This model extends the preceding model of the present authors [Svoboda, J. and Lukas, P., Acta mater. , 1998, 46 , 3421] covering the case of creep in 〈001〉 oriented crystals.
J. Svoboda, P. Lukáš
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Recrystallisation of single crystal superalloy CMSX–4

Materials Science and Technology, 2003
AbstractA series of experiments investigating the recrystallisation of single crystal superalloy CMSX-4 have been carried out. Indentation atroom temperature has been used to study the effects of annealing time and temperature, and it has been found that a very strong dependence upon temperature is evident.
D. C. Cox, B. Roebuck, C. M. F. Rae, R. C. Reed   +3 more
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Directionally Solidified and Single-Crystal Superalloys

1990
Abstract Directionally solidified (DS) and single-crystal (SX) superalloys and process technology are contributing to significant advances in turbine engine efficiency and durability. These gains are expected to arise from the development of higher creep strength and improved oxidation-resistant SX alloy compositions as well as from the ...
K. Harris, G.L. Erickson, R.E. Schwer
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Single Crystal Superalloys

Advanced materials such as single crystal superalloys (SCSs) are made especially for high temperature uses, including turbine engines in the aerospace and electricity generation companies. Their single crystalline shape, which distinguishes their microstructures, confers superior mechanical behaviours, including remarkable fatigue strength and creep ...
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Anisotropic Creep of Single Crystal Superalloys

2001
Single crystal Ni-base superalloys are an integral feature of modern gas turbine engines. Their excellent high temperature tensile properties are a result of a number of factors including an absence of grain boundaries and a matrix which comprises a high volume fraction of cuboidal γ’ in a solid solution strengthened γ matrix.
D. M. Knowles, D. W. MacLachlan
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Segregation in Single-Crystal Nickel-Base Superalloys

Defect and Diffusion Forum, 2011
The effect and the ways of removal of the segregation of alloying elements within the dendrite cell in single-crystal nickel-base superalloys are discussed. The peculiar features of Re and Ru behavior are underlined.
A.I. Epishin, I.L. Svetlov, N.V. Petrushin, Yu.V. Loshchinin, T. Link   +4 more
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