Anomalous Temperature-Dependent Behavior of Physical Properties of CrFeNi, CoCrNi, and CoCrFeNi Medium- and High-Entropy Alloys

18 Pages Posted: 7 Sep 2022

See all articles by Angelo F. Andreoli

Angelo F. Andreoli

IFW Dresden - Institute for Complex Materials

Torsten Mix

Leibniz Institute for Solid State and Materials Research (IFW) - Institute for Metallic Materials

Thomas George Woodcock

Leibniz Institute for Solid State and Materials Research (IFW) - Institute for Metallic Materials

Nazir Fasel

University of Lorraine - Laboratoire de Chimie et Physique - Approches Multiéchelles des Milieux Complexes (LCP-A2MC)

Jean-Georges Gasser

University of Lorraine - Laboratoire de Chimie et Physique - Approches Multiéchelles des Milieux Complexes (LCP-A2MC)

Kornelius Nielsch

IFW Dresden - Institute for Metallic Materials

Ivan Kaban

IFW Dresden - Institute for Complex Materials

Abstract

The linear thermal expansion coefficient, heat capacity, electrical resistivity, and its temperature coefficient d(In R)/dT of the medium-entropy CrFeNi and CoCrNi alloys and CoCrFeNi high-entropy alloy revealed an anomalous behavior in the temperature range of 700 – 900 K. The behavior is not only different between the first and second heating, but also between the first heating and the first cooling. However, a minimum in α and Cp and a maximum in d(In R)/dT are only observed in the first heating. Magnetic moment measurements as a function of temperature proved that the observed anomalies are not associated with the Curie temperature. Consideration of the structural and microstructural features also discards recrystallization as a probable cause. The anomalies are believed to be caused by chemical short-range order transition known as the K-state effect.

Keywords: High-entropy alloy, Dilatometry, Differential scanning calorimetry, Electrical resistivity, Short-range ordering

Suggested Citation

Andreoli, Angelo F. and Mix, Torsten and Woodcock, Thomas George and Fasel, Nazir and Gasser, Jean-Georges and Nielsch, Kornelius and Kaban, Ivan, Anomalous Temperature-Dependent Behavior of Physical Properties of CrFeNi, CoCrNi, and CoCrFeNi Medium- and High-Entropy Alloys. Available at SSRN: https://ssrn.com/abstract=4212305 or http://dx.doi.org/10.2139/ssrn.4212305

Angelo F. Andreoli (Contact Author)

IFW Dresden - Institute for Complex Materials ( email )

Helmholtzstr. 20
01069 Dresden
Germany

Torsten Mix

Leibniz Institute for Solid State and Materials Research (IFW) - Institute for Metallic Materials ( email )

Thomas George Woodcock

Leibniz Institute for Solid State and Materials Research (IFW) - Institute for Metallic Materials ( email )

Nazir Fasel

University of Lorraine - Laboratoire de Chimie et Physique - Approches Multiéchelles des Milieux Complexes (LCP-A2MC) ( email )

Jean-Georges Gasser

University of Lorraine - Laboratoire de Chimie et Physique - Approches Multiéchelles des Milieux Complexes (LCP-A2MC) ( email )

Kornelius Nielsch

IFW Dresden - Institute for Metallic Materials ( email )

Helmholtzstr. 20
01069 Dresden
Germany

Ivan Kaban

IFW Dresden - Institute for Complex Materials ( email )

Helmholtzstr. 20
01069 Dresden
Germany

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