A cobalt-rich eutectic high-entropy alloy in the system Al–Co–Cr–Fe–Ni

Shafiei, Ali; Rajabi, Samin

doi:10.1007/s00339-019-3084-9

Cited by 26 publications

(3 citation statements)

References 45 publications

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“…До цього часу повідомлялося про деякі стратегії проектування з використанням, наприклад, ентальпії змішування [8], простого методу змішування [9], псевдобінарного методу [10], напівкількісного методу розрахунку фазових діаграм (CALPHAD), методу групування та машинного моделювання [10,11], і ці підходи коротко викладені в роботі [12]. Перелік зареєстрованих ЕВЕСів з повністю евтектичною мікроструктурою наведено в роботах [10,[13][14][15][16][17][18][19][20] В роботі [21] було виготовлено серію ВЕСів на основі системи Co-Cr-Fe-Ni з 0,1, 0,2, 0,3, 0,4, 0,5, 0,7 і 0,9 % мас. част.…”

Section: нові литі матеріалиїunclassified

Development and smelting of casting high-entropy alloys based on the Fe-Co-Ni-Mn-Cr system.

Shcheretskyi¹,

Sergiienko²,

Verkhovliuk³

2022

Processy litʹâ

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ВступУспішною спробою в розробці нових матеріалів є створення високоентропійних сплавів (ВЕС), які є комбінацією декількох основних компонентів (не менше п'яти) в приблизно рівних атомних концентраціях [1,2]. Як правило, атомна частка кожного елемента, що входить до складу ВЕС, може змінюватись від 0,05 до 0,30 залежно від загальної кількості компонентів n. Оскільки всі компоненти змішані в приблизно рівних

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Section: нові литі матеріалиїunclassified

Development and smelting of casting high-entropy alloys based on the Fe-Co-Ni-Mn-Cr system.

Shcheretskyi¹,

Sergiienko²,

Verkhovliuk³

2022

Processy litʹâ

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“…An alloy is considered as eutectic if simulation results predict that the solidification occurs in a narrow temperature range (ΔTmax=10 °C), and if during the solidification simultaneous formation of two solid phases γ (fcc) and B2 (bcc) occurs. This criterion is considered here according to the obtained simulation results for verified EHEAs [25].…”

Section: Thermodynamic Simulationsmentioning

confidence: 99%

Design of Eutectic High Entropy Alloys in Al–Co–Cr–Fe–Ni System

Shafiei

2020

Met. Mater. Int.

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In the present work, a simple approach is proposed for predicting the compositions of eutectic high entropy alloys (EHEAs) in Al-Co-Cr-Fe-Ni system. It is proposed that eutectic lines exist between certain eutectic alloys in this system and, as a result, new eutectic or near-eutectic compositions can be obtained by mixing the alloys which are located on the same eutectic line. The approach is applied for a series of experimentally verified eutectic alloys and new eutectic or near-eutectic alloys are designed for Al-Co-Cr-Fe-Ni system. Furthermore, by investigating the compositions of verified eutectic alloys in Al-Co-Cr-Fe-Ni system, compositional diagrams are proposed which show the relations between the concentrations of constituent elements in eutectic alloys. The compositional diagrams suggest that EHEAs are derived from binary and ternary eutectic alloys.Moreover, the proposed diagrams can be considered as convenient methods for evaluating the composition of EHEAs in Al-Co-Cr-Fe-Ni system.

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“…Al 16 Co 41 Cr 15 Fe 10 Ni 18 [24], etc. Since the above mentioned EHEAs contain expensive Co elements, which adversely affect their industrial applications, researchers have conducted Co-free studies based on this alloy system.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and properties of CrxFeNi(3-x)Al high-entropy alloys

Zhang

et al. 2021

Appl. Phys. A

113

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A set of novel Co-free high-entropy alloys Cr x FeNi (3-x) Al (x = 0.25, 0.5, 0.75, 1, 1.25, 1.5) were fabricated by non-selfconsumable vacuum melting method, and their solidification microstructures as well as compression properties were investigated. The research results firstly demonstrate that the solidification microstructures of Cr-0.25, Cr-0.5 and Cr-0.75 are composed of primary B2 phase and (FCC + B2) eutectic structure; Secondly, there are primary B2 phase and (FCC + B2) eutectic structure in the solidification microstructure of Cr-1, with a tiny amount of BCC phase distributing on the matrix of primary phase B2; In addition, as a "sunflower-like" structure of BCC phase and B2 phase, the solidification microstructure of Cr-1.25 is identified. Also, the core of the sunflower is B2 phase, and the petals are alternately arranged by BCC phase and B2 phase; Last but not least, it is a fine BCC phase and B2 dual-phase structure that form the solidification microstructure of Cr-1.5. Among the phases mentioned above, the FCC phase is abundant in Ni and Fe elements, the B2 phase is abundant in Ni and Al elements, and the BCC phase is abundant in Cr element. With the ascending trend of Cr content, the strength of Cr x FeNi (3-x) Al high-entropy alloy descends initially and then climbs, during which the primary reasons for the rise of strength are solid solution strengthening, fine crystal strengthening and precipitation of BCC phase. The compressive strengths of Cr-1.25 and Cr-1.5 alloys are 2111.5 and 1985.3 MPa, respectively, and the compressibility can attain to 41.36 and 49.87%, respectively, manifesting comprehensive mechanical properties.

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A cobalt-rich eutectic high-entropy alloy in the system Al–Co–Cr–Fe–Ni

Cited by 26 publications

References 45 publications

Development and smelting of casting high-entropy alloys based on the Fe-Co-Ni-Mn-Cr system.

Development and smelting of casting high-entropy alloys based on the Fe-Co-Ni-Mn-Cr system.

Design of Eutectic High Entropy Alloys in Al–Co–Cr–Fe–Ni System

Microstructures and properties of CrxFeNi(3-x)Al high-entropy alloys

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