Eutectic Superalloys

Thompson, E.R.; George, F

doi:10.4271/690689

Cited by 3 publications

(4 citation statements)

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“…Despite the remarkable properties of AlNbTiV Zr 0.25 alloy, it is nevertheless interesting to see whether such alloys can be further improved by controlling their microstructure. An attractive way to increase the heat resistance while maintaining acceptable ductility is to create composite structures with a regular arrangement of soft and hard phases, which can be done, e.g., in eutectic alloys [19,20]. Eutectic alloys generally have a stable structure, a good combination of strength and ductility, and good casting properties.…”

Section: Development and Investigation Of Al-cr-nb-ti-zr Eutectic Alloysmentioning

confidence: 99%

Design and Characterization of Al-Cr-Nb-Ti-V-Zr High-Entropy Alloys for High-Temperature Applications

et al. 2021

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High-entropy alloys (HEAs) are a new class of metallic alloys without a principal component. These materials are attractive because of their unique structures and properties, including mechanical ones. Some of HEAs based on refractory metals are considered as advanced high-temperature materials. However, the development of new applicable compositions is complicated by poor understanding of relationships between the chemical and phase composition of HEAs and their effect on mechanical performance. Here we report the results of comprehensive studies of Al-Cr-Nb-Ti-V-Zr high-entropy alloys, particularly AlCr x NbTiVZr y (х = 0.00, 0.25, 0.50, 1.00, 1.50 at y = 0 and y = 0.0, 0.25, 0.50, 1.00, 1.50 at x = 0). The strength and ductility of such alloys are shown to have a complex relationship with the composition and order of the parent B2 phase, and the amount and nature of secondary phases (C14 Laves phase and zirconium aluminides). Some of the investigated alloys demonstrate high specific strength at T ≤ 800°C. AlNbTiVZr 0.25 alloy also has a stable microstructure and higher creep resistance at 600°C compared to existing creep-resistant alloys. Based on calculations of equilibrium and nonequilibrium phase diagrams by the CALPHAD method, we propose new Al-Cr-Nb-Ti-Zr alloy compositions with unique lamellar eutectic structure composed of the B2 and C14 Laves phases and with enhanced strength properties. The structure/property relationships and high-temperature deformation mechanisms of refractory HEAs with eutectic microstructure are analyzed.

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Section: Development and Investigation Of Al-cr-nb-ti-zr Eutectic Alloysmentioning

confidence: 99%

Design and Characterization of Al-Cr-Nb-Ti-V-Zr High-Entropy Alloys for High-Temperature Applications

et al. 2021

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“…Von den in Frage kommenden Grundmetallen weisen bei Temperaturen oberhalb 1000 O C nur Legierungen (nach E. R. Thompson [15] und M. S. Salkind [16]). …”

Section: Oxydationsbestandigkeit Der Verbundwerkstoffeunclassified

“…Dies sind Zahlenwerte, die fur Turbinenschaufelwerkstoffe interessant sind. Weitere Untersuchungen von Thompson und George [15] …”

Section: Oxydationsbestandigkeit Der Verbundwerkstoffeunclassified

Aussichten für die Entwicklung technisch nutzbarer faserverstärkter Hochtemperaturwerkstoffe

Elssner

1971

Materialwissenschaft Werkst

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“…The preparation of samples and directional solidification is described elsewhere (8,9). The alloy compositions examined here are given in Table I .…”

Section: Introductionmentioning

confidence: 99%

Tensile strength of eutectic, directionally solidified alloys based on the CoCrC‐system

Hildebrandt¹,

Nicoll²

1981

Materialwissenschaft Werkst

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The influence of various alloy elements on tensile strength of the eutectic, directionally solidified superalloy 73 C was determined. The tensile properties of the base alloy had been increased by Al, Y and C as alloying elements, while Ni and Ti showed a decreasing effect (alloy softening). However, ductility and thermo‐fatigue behaviour had been influenced in a positive way be these elements. The specific mechanisms caused by the different elements are discussed.

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Eutectic Superalloys

Cited by 3 publications

References 0 publications

Design and Characterization of Al-Cr-Nb-Ti-V-Zr High-Entropy Alloys for High-Temperature Applications

Design and Characterization of Al-Cr-Nb-Ti-V-Zr High-Entropy Alloys for High-Temperature Applications

Aussichten für die Entwicklung technisch nutzbarer faserverstärkter Hochtemperaturwerkstoffe

Tensile strength of eutectic, directionally solidified alloys based on the CoCrC‐system

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