Development of the Rhenium Containing Superalloys CMSX-4 &amp; CM 186 LC for Single Crystal Blade and Directionally Solidified Vane Applications in Advanced Turbine Engines

Harris, Ken; Erickson, G. L.; Sikkenga, Steven L.; Brentnall, W. D.; Aurrecoechea, José M.; Kubarych, K.G.

doi:10.7449/1992/superalloys_1992_297_306

Cited by 81 publications

(52 citation statements)

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“…They compared the stress and displacement of as-extracted γ -particles with particles irradiated by focused ion beam. In this study, the deformation behavior of cube-shaped γ -particles extracted from the superalloy CMSX-4 [15] was investigated using a Hysitron SEM-Picoindenter with a boron-doped-flat punch diamond tip and a Si wafer as substrate. To observe and document the deformation process at the same time, the indenter was placed in a Hitachi S-4800 SEM equipped with a cold field emission gun.…”

Section: Resultsmentioning

confidence: 99%

Compression Experiments on γ′-Nanoparticles

et al. 2012

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The mechanical behavior of cubic γ -nanoparticles is investigated in uniaxial compression. These nanoparticles are freestanding, single crystalline and have a well-defined crystallography related to the cubic geometry (cube faces correspond to the crystallographic {100}-planes). The true values of stress and strain were measured and evaluated. With a true strength of about 3000 MPa to 5000 MPa the nanoobjects reach a significant portion of the theoretical strength. Even after a true strain of about one, no signs of particle damage are observed.

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Section: Resultsmentioning

confidence: 99%

Compression Experiments on γ′-Nanoparticles

et al. 2012

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“…After the conventional process route, it is not possible to dissolve the residual microsegregation in an economic way. [1] The alloy provides good high-temperature properties due to the two-phase c/c¢-microstructure, a high volume fraction of c¢ (up to 70 pct) and the solid solution strengthening effects of Cr, W, Ta, and Re. Additionally, Re decreases significantly the c¢ coarsening kinetics.…”

Section: Introductionmentioning

confidence: 99%

“…[1,6] An important criterion for heat treatment is the primary dendrite arm spacing (DAS) k 1 which represents the length scale of element segregation. With increasing DAS, homogenization heat treatment gets more and more difficult and time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Microstructure of the Nickel-Base Superalloy CMSX-4 Fabricated by Selective Electron Beam Melting

Ramsperger

Singer

Körner

2016

Metall Mater Trans A

194

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Powder bed-based additive manufacturing (AM) processes are characterized by very hightemperature gradients and solidification rates. These conditions lead to microstructures orders of magnitude smaller than in conventional casting processes. Especially in the field of high performance alloys, like nickel-base superalloys, this opens new opportunities for homogenization and alloy development. Nevertheless, the high susceptibility to cracking of precipitation-hardenable superalloys is a challenge for AM. In this study, electron beam-based AM is used to fabricate samples from gas-atomized pre-alloyed CMSX-4 powder. The influence of the processing strategy on crack formation is investigated. The samples are characterized by optical and SEM microscopy and analyzed by microprobe analysis. Differential scanning calorimetry is used to demonstrate the effect of the fine microstructure on characteristic temperatures. In addition, in situ heat treatment effects are investigated.

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“…In general, more refractory elements such as rhenium improve the creep resistance of the materials for advanced turbine blade [1][2][3][4]. It has also been reported that the γ /γ rafting behaviour is effective for creep resistance in case of the single crystal (SX) superalloys [5,6].…”

Section: Introductionmentioning

confidence: 99%

Creep deformation behaviour of Rhenium free Ni-based single crystal superalloys LSC-15

Tsuno

Takahashi

2014

MATEC Web of Conferences

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Abstract. In this paper, creep deformation behavior of Ni-based single crystal superalloys LSC-15 were studied. LSC-15 does not include Rhenium and has been developed by IHI Corporation Japan. Creep tests were performed at 1000 and 1050 • C under several stress levels. The creep deformation behaviour was different between test temperatures at 1000 • C and 1050 • C. Moreover, the relationship between the minimum creep rate and stress was different at the various temperatures. The stress exponent values at 1000 • C and 1050 • C, were n = 6 and 12 respectively. This difference was due to differences in the formation of dislocation network. At 1000 • C, when the minimum creep rate, the dislocation network formed completely independent of stress level. On the other hand, at 1050 • C, the dislocation network had not developed fully at the minimum creep rate and the formation of dislocation network depended on the stress level. Therefore, stress dependency at 1050 • C is higher than that at 1000 • C.

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Development of the Rhenium Containing Superalloys CMSX-4 & CM 186 LC for Single Crystal Blade and Directionally Solidified Vane Applications in Advanced Turbine Engines

Cited by 81 publications

References 0 publications

Compression Experiments on γ′-Nanoparticles

Compression Experiments on γ′-Nanoparticles

Microstructure of the Nickel-Base Superalloy CMSX-4 Fabricated by Selective Electron Beam Melting

Creep deformation behaviour of Rhenium free Ni-based single crystal superalloys LSC-15

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