Journal ArticleDOI
Creep of CMSX-4 superalloy single crystals: effects of rafting at high temperature
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In this paper, the creep performance of (001)-orientated superalloy single crystals at temperatures beyond 1000 C was analyzed and it was demonstrated that methods of interpretation which, assume a proportionality between the creep strain rate and creep strain, are unable to account for creep hardening which occurs as a consequence of rafting.About:
This article is published in Acta Materialia.The article was published on 1999-09-29. It has received 269 citations till now. The article focuses on the topics: Creep & Stress relaxation.read more
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High temperature fatigue of nickel-base superalloys - A review with special emphasis on deformation modes and oxidation
TL;DR: In this article, a review of Ni-base superalloys in terms of fundamental deformation mechanisms, environmental effects, and interactions between environment and deformation mode is presented, where the basic principles that are developed are used to show how both intrinsic and extrinsic variables can be manipulated to control fatigue behaviour and as a guide for formulation of engineering life prediction models.
Journal ArticleDOI
Microstructural and compositional design of Ni-based single crystalline superalloys ― A review
TL;DR: In this paper, a review on the effects of some common alloying elements on the microstructural and mechanical property stability control of Ni-based superalloys is presented, including base elements, mechanical strengthening elements, long term stability elements and the oxidation resistance elements.
Journal ArticleDOI
The importance of sign and magnitude of γ/γ′ lattice misfit in superalloys—with special reference to the new γ′-hardened cobalt-base superalloys
TL;DR: In this paper, the role played by the lattice misfit (which is negative for all currently used Ni-base superalloys) is elucidated with respect to its sign, magnitude and temperature dependence.
Journal ArticleDOI
Mechanisms of high-temperature creep of nickel-based superalloys under low applied stresses
A. Epishin,Thomas Link +1 more
TL;DR: In this paper, single-crystal specimens of the superalloys CMSX-4 and MSX-10 were tested for creep at 1100°C under tensile stresses between 105 and 135 MPa, where they showed pronounced steady creep.
Journal ArticleDOI
Damage accumulation during creep deformation of a single crystal superalloy at 1150 °C
TL;DR: In this article, microstructural degradation in the CMSX-4 single crystal superalloy during creep deformation at 1150°C and 100MPa is studied. And it is shown that the high strain rates and shear stresses associated with the rupture process are sufficient to cause realignment of the rafted γ′ structure with respect to the γ matrix.
References
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Journal ArticleDOI
On the kinetics of rafting in CMSX-4 superalloy single crystals
TL;DR: In this paper, the kinetics of γ′ rafting in single crystals at 950°C have been studied using scanning and transmission electron microscopies, and it is concluded that the threshold strain is a quantity suitable for distinguishing between rafting occurring in the “elastic� and “plastic” regimes.
Journal ArticleDOI
Creep of CMSX-4 superalloy single crystals: effects of misorientation and temperature
TL;DR: In this paper, the effect of misorientation away from the symmetry boundary on the creep performance of superalloy single crystals has been investigated, and it is suggested that the occurrence of small misorientations can be associated with both primary and tertiary deformation.
Journal ArticleDOI
Tertiary creep in nickel-base superalloys: analysis of experimental data and theoretical synthesis
B.F. Dyson,T.B. Gibbons +1 more
TL;DR: In this article, a more substantial range of data for alloys of this type is presented and it is concluded that ductility in creep is the most significant parameter correlating differences in rates of strain-accumulation in the tertiary stage: thus, the lower the ductility the greater the rate of strain accumulation.
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