2020
DOI: 10.1007/978-3-030-51834-9_11
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Composition and Temperature Stability of η and δ Phases for Future Nickel-Base Superalloys for Turbine Disks Application

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Cited by 7 publications
(4 citation statements)
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“…In this context, it was found that Co-addition increases the solvus temperature of the Nb-rich high temperature precipitates that were identified to consist of η-and δphase [25]. Finet et al [26] studied the formation of the δ and η-phase in two experimental alloys with varying Cr and Co content. In all cases, they observed an increase in the volume fraction of the phases with increased Cr content whereas an increased Co content further increased the volume fraction in one alloy, but not in the other.…”
Section: Discussionmentioning
confidence: 99%
“…In this context, it was found that Co-addition increases the solvus temperature of the Nb-rich high temperature precipitates that were identified to consist of η-and δphase [25]. Finet et al [26] studied the formation of the δ and η-phase in two experimental alloys with varying Cr and Co content. In all cases, they observed an increase in the volume fraction of the phases with increased Cr content whereas an increased Co content further increased the volume fraction in one alloy, but not in the other.…”
Section: Discussionmentioning
confidence: 99%
“…The metastable " phase transforms into the stable -phase (Ni3Nb, needle-like and plate-like) when exposed to temperatures above 650 °C. On the other hand, in the superalloy manufacturing processes, microstructure control is critical for developing optimal mechanical properties [1,2].…”
Section: Introductionmentioning
confidence: 99%
“…Since their inception, nickel-base superalloys have been studied [1][2][3][4][5][6][7][8][9] to understand their behavior under different thermal and mechanical conditions. For instance, the so-called direct aging (DA), which omits the solution annealing step, and proceeds directly to age hardening after forging to increase the yield strength by at least 10% at 650 °C, by both retaining high dislocation densities and changing the nanoscale co-precipitate morphology [6].…”
Section: Introductionmentioning
confidence: 99%
“…La presencia de dos fases γ' se debe a que ocupan el espacio estequiométrico A(Ni,Cu). La fase η(Ni3Ti) deriva de la fase γ' y está representada por una estructura cristalina hexagonal [316] con la misma estequiometría que la fase γ' pero con forma de acicular [317]. La estequimetria de la fase B2 es AB, donde los elementos son de los grupos IV a XIII [318][319][320].…”
Section: Caracterización Microestructural De Aleación Hea1unclassified