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Creep-rupture behavior of a directionally solidified nickel-base superalloy
Metallurgical and Materials Transactions A, 2001The creep-rupture behavior of the directionally solidified (DS) nickel-base superalloy DZ17G has been investigated over a wide stress range of 60 to 950 MPa at high temperature (923 to 1323 K). In this article, the detailed creep deformation and fracture mechanisms at constant load have been studied.
Guo JT +4 more
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Corrosion kinetics of a directionally solidified Ni-base superalloy
Acta Materialia, 2007A variety of experiments were carried out to characterize the corrosion kinetics of a longitudinally oriented directionally solidified Ni-base superalloy, DS GTD-111, commonly applied as a first- and second-stage blading material in electric power generation gas-powered turbines.
Gordon, Ali P. +4 more
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CYCLIC DEFORMATION OF A DIRECTIONALLY SOLIDIFIED COBALT‐BASE SUPERALLOY
Fatigue & Fracture of Engineering Materials & Structures, 1998An investigation has been carried out on the cyclic deformation and changes in microstructure of a directionally solidified cobalt‐base superalloy. The tests are conducted at 700 °C and 850 °C in air under different total strain amplitudes. The alloy tested at 700 °C exhibits an initial hardening, a short saturation stage and an evident secondary ...
null Zheng +3 more
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An Anisotropic Constitutive Model for a Directionally Solidified Superalloy
Key Engineering Materials, 2007The monotonic tensile and creep deformations of a directionally solidified (DS) superalloy are investigated for several loading directions. The material exhibits remarkable anisotropy under elastic and creep loading conditions, whereas it shows isotropy under loading conditions of high strain rates.
Masatsugu Yaguchi +3 more
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Temperature Dependent Elastic Constants of Directionally Solidified Superalloys
Journal of Engineering Materials and Technology, 2012Directionally solidified superalloys have been extensively used as turbine blade materials to improve creep-rupture and thermal fatigue performances. Turbine blades are subjected to fluctuant temperature changes. Precise knowledge of material behavior at various temperatures is essential in design and service life evaluation of turbine blades.
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Creep behavior of a directionally solidified nickel based superalloy
Strength, Fracture and Complexity: An International Journal, 2006Directionally solidified nickel-base superalloys provide significant improvements relative to the limitations inherent to equiaxed materials in the areas of creep resistance, oxidation, and low and high cycle fatigue resistance. The objectives of this study are to perform critical experiments and investigate the high temperature creep deformation ...
Alejandro R. Ibañez +2 more
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Anisotropic viscoplasticity constitutive model for directionally solidified superalloy
Materials at High Temperatures, 2012AbstractThe macroscopic deformation behaviour of a Ni-based directionally solidified (DS) superalloy was experimentally investigated, and an anisotropic constitutive model of the material was developed. Monotonic and creep tests were performed on uniaxial test specimens machined from DS plates so that the angle between the loading direction and the ...
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Thermomechanical Fatigue Behavior of a Directionally Solidified Ni-Base Superalloy
Journal of Engineering Materials and Technology, 2005A continuum crystal plasticity model is used to simulate the material behavior of a directionally solidified Ni-base superalloy, DS GTD-111, in the longitudinal and transverse orientations. Isothermal uniaxial fatigue tests with hold times and creep tests are conducted at temperatures ranging from room temperature (RT) to 1038°C to characterize the ...
M. M. Shenoy +3 more
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Solidification microstructure of directionally solidified superalloy under high temperature gradient
Rare Metals, 2012The effect of solidification rate on the microstructure development of nickel-based superalloy under the temperature gradient of 500 K·cm−1 was studied. The results show that, with the increase of directional solidification rate from 50 to 800 μm·s−1, both the primary and the secondary dendrite arm spacings of the alloy decrease gradually, and the ...
Weiguo Zhang, Lin Liu
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Creep failure analysis of directionally solidified CM247LC superalloy
Materials TestingAbstract This study investigates the behavior of an in-house cast directionally solidified nickel-based superalloy (i.e. CM247LC grade alloy) at low and high temperatures (760 and 982 °C, respectively). For this purpose, creep and tensile tests were conducted on the alloy after the heat treatment consisted of solutionizing and double ...
Müge Akdemir +3 more
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