Low temperature dynamics and kinetics of dislocation motion in the high-entropy alloy Al$_{0.5}$CoCrCuFeNi

TL;DR

This paper investigates the low-temperature behavior of dislocation motion in the high-entropy alloy Al$_{0.5}$CoCrCuFeNi, revealing key mechanisms and barriers affecting plastic deformation and acoustic relaxation.

Contribution

It provides a detailed analysis of dislocation dynamics and barriers in the alloy, with quantitative estimates based on modern dislocation theory, at low temperatures.

Findings

Identified dominant dislocation defects.

Characterized barriers to dislocation movement.

Quantified dislocation interactions with barriers.

Abstract

An analysis of the processes of plastic deformation and acoustic relaxation in a high-entropy alloy Al$_{0.5}$CoCrCuFeNi was carried out. The following have been established: dominant dislocation defects; types of barriers that prevent the movement of dislocations; mechanisms of thermally activated movement of various elements of dislocation lines through barriers at room and low temperatures. Based on modern dislocation theory, quantitative estimates have been obtained for the most important characteristics of dislocations and their interaction with barriers.