2015
DOI: 10.1007/s11661-015-2898-0
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Design of an Eta-Phase Precipitation-Hardenable Nickel-Based Alloy with the Potential for Improved Creep Strength Above 1023 K (750 °C)

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Cited by 21 publications
(8 citation statements)
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“…Nickel-based alloys represent a particularly important class of superalloys for high temperature applications [1]. The most remarkable ones are the γ/γ' single crystals which offer very high levels of high temperature mechanical properties [2][3][4] and oxidation resistance [5][6][7][8]. Essentially devoted to constitute elongated pieces, these singlecrystal alloys are unfortunately not suitable to the compact geometries of many complex-shaped components for which other elaboration/shaping techniques must be preferred (conventional foundry, powder metallurgy…).…”
Section: Introductionmentioning
confidence: 99%
“…Nickel-based alloys represent a particularly important class of superalloys for high temperature applications [1]. The most remarkable ones are the γ/γ' single crystals which offer very high levels of high temperature mechanical properties [2][3][4] and oxidation resistance [5][6][7][8]. Essentially devoted to constitute elongated pieces, these singlecrystal alloys are unfortunately not suitable to the compact geometries of many complex-shaped components for which other elaboration/shaping techniques must be preferred (conventional foundry, powder metallurgy…).…”
Section: Introductionmentioning
confidence: 99%
“…At longer exposures at this temperature, γ′-Ni 3 Ti transforms into a coarse, plate-deposited η-Ni 3 Ti phase, which crystallizes in a hexagonal, close-packed lattice (HCP Ni 3 Ti). Several works deal with the transformation of the γ′-Ni 3 Ti phase to η-phase [ 3 , 4 , 5 ]. The η phase occurs in Ni, Ni–Fe, and Co alloys, where the ratio of Ti:Al alloying elements is >1, most often about 3:1.…”
Section: Introductionmentioning
confidence: 99%
“…For this reason, the DO 24 η-phase was considered to replace the γ′-phase as a reinforcing phase at higher temperatures. The η phase is most often excreted at grain boundaries, either in the form of blocks or needles at aging temperatures in the range of 600–850 °C or with a Widmanstätten morphology at aging temperatures above 850 °C [ 5 ]. Some studies suggest that the η-phase may also arise as a consequence of the degradation of primary MC carbides, as their degradation releases Ti [ 6 , 7 ].…”
Section: Introductionmentioning
confidence: 99%
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“…a L1 2 -ordered ′ -precipitate phase and a ductile -matrix phase. The ′ precipitates, dispersed in the -matrix, play a significant role in increasing the strength and enhancing the fatigue and creep behaviour of the alloys at elevated temperature [1][2][3]. In order to achieve further improved mechanical properties, new development of nickel-based superalloys is normally pursued by increasing the ′ volume fraction.…”
Section: Introductionmentioning
confidence: 99%