Publication detail
High entropy alloys (FeCoNi) 0.75 Cr 0.25-x Cu x - thermal stability and physical properties
BROŽ, P. VŘEŠŤÁL, J. SOPOUŠEK, J. WEISS, K. BURŠÍK, J. BURŠÍKOVÁ, V. ZÁDĚRA, A. MÜLLER, P. ČUPERA, J. ROGL, G. PARZER, M. BAUER, E. MICHOR, H. ROGL.P.F.
English title
High entropy alloys (FeCoNi) 0.75 Cr 0.25-x Cu x - thermal stability and physical properties
Type
journal article in Web of Science
Language
en
Original abstract
The paper reports on the phase stability of the (FeCoNi) 0.75 Cr 0.25-x Cu x HEA system with equimolar ratio of Fe, Co and Ni by differential scanning calorimetry (DSC) and measurements of physicochemical properties: density, electrical resistivity, Seebeck coefficient, thermal conductivity, and magnetic behaviour in a broad temperature region as well as hardness and elastic modulus at room temperature as a function of the gradual substitution of chromium by copper in a series of (FeCoNi) 0.75 Cr 0.25-x Cu x alloys with different mole fraction of Cu (x = 0, 0.05, 0.1, 0.15 and 0.2). DSC measurements showed that all alloys are thermally stable. Increasing content of Cu was found (i) to increase the formation of a fcc Cu-rich phase, (ii) to strengthen ferromagnetic interactions, resulting in rising ordered magnetic moments, as well as in growing ferromagnetic transition temperatures, and (iii) to distinctly change physical properties like electrical resistivity, thermal expansion, and mechanical properties. Experimental data regarding the phase stability are supported by CALPHAD calculations.
English abstract
The paper reports on the phase stability of the (FeCoNi) 0.75 Cr 0.25-x Cu x HEA system with equimolar ratio of Fe, Co and Ni by differential scanning calorimetry (DSC) and measurements of physicochemical properties: density, electrical resistivity, Seebeck coefficient, thermal conductivity, and magnetic behaviour in a broad temperature region as well as hardness and elastic modulus at room temperature as a function of the gradual substitution of chromium by copper in a series of (FeCoNi) 0.75 Cr 0.25-x Cu x alloys with different mole fraction of Cu (x = 0, 0.05, 0.1, 0.15 and 0.2). DSC measurements showed that all alloys are thermally stable. Increasing content of Cu was found (i) to increase the formation of a fcc Cu-rich phase, (ii) to strengthen ferromagnetic interactions, resulting in rising ordered magnetic moments, as well as in growing ferromagnetic transition temperatures, and (iii) to distinctly change physical properties like electrical resistivity, thermal expansion, and mechanical properties. Experimental data regarding the phase stability are supported by CALPHAD calculations.
Keywords in English
HEA; Phase equilibria; DSC; Physical properties; Density; Thermal expansion; Hardness
Released
23.04.2024
Publisher
ELSEVIER SCIENCE SA
Location
LAUSANNE
ISSN
0925-8388
Volume
993
Number
July
Pages from–to
1–11
Pages count
11
BIBTEX
@article{BUT189753,
author="Pavel {Brož} and Jan {Vřešťál} and Jiří {Sopoušek} and Vilma {Buršíková} and Antonín {Záděra} and Peter {Müller} and Jan {Čupera},
title="High entropy alloys (FeCoNi) 0.75 Cr 0.25-x Cu x – thermal stability and physical properties",
year="2024",
volume="993",
number="July",
month="April",
pages="1--11",
publisher="ELSEVIER SCIENCE SA",
address="LAUSANNE",
issn="0925-8388"
}