RT Journal Article
T1 Design and production of a new feconicralcu high-entropy alloy: influence of powder production method on sintering
A1 Reverte Palomino, Eduardo
A1 Calvo-Dahlborg, Monique
A1 Dahlborg, Ulf
A1 Campos Gómez, Mónica
A1 Alvaredo Olmos, Paula
A1 Martín Rodríguez, Pablo
A1 Gordo Odériz, Elena
A1 Cornide Arce, Juan
AB The structure of FeCoNiCrAl1.8Cu0.5 high-entropy alloys (HEA) obtained by two different routes has been studied. The selection of the composition has followed the Hume-Rothery approach in terms of number of itinerant electrons (e/a) and average atomic radius to control the formation of specific phases. The alloys were obtained either from a mixture of elemental powders or from gas-atomised powders, being consolidated in both cases by uniaxial pressing and vacuum sin-tering at temperatures of 1200 degrees C and 1300 degrees C. The characterization performed in the sintered samples from both types of powder includes scanning electron microscopy, X-ray diffraction, differential thermal analysis, and density measurements. It was found that the powder production techniques give similar phases content. However, the sintering at 1300 degrees C destroys the achieved phase stability of the samples. The phases identified by all techniques and confirmed by Thermo-Calc calculations are the following: a major Co-Ni-Al-rich (P1) BCC phase, which stays stable after 1300 degrees C sintering and homogenising TT treatments; a complex Cr-Fe-rich (P2) B2 type phase, which transforms into a sigma phase after the 1300 degrees C sintering and homogenising TT treatments; and a very minor Al-Cu-rich (P3) FCC phase, which also transforms into Domain II and Domain III phases during the heating at 1300 degrees C and homogenising TT treatments.
PB MDPI
SN 1996-1944
YR 2021
FD 2021-08
LK https://hdl.handle.net/10016/34377
UL https://hdl.handle.net/10016/34377
LA eng
NO This investigation was supported by the Spanish Government through grant MAT2015-70780-C4-2, and the Regional Government of Madrid through the programme ADITIMAT-CM (Ref.S2018/NMT-4411). J. Cornide also acknowledges funding from the Spanish Ministry of Science andInnovation (IJCI-2017-31348).
DS e-Archivo
RD 30 abr. 2024