2025/05/23 by Afonin, G. V., Scherbakov, S. L., Konchakov, R. A. +4
#Disordered Systems and Neural Networks (cond-mat.dis-nn) #FOS: Physical sciences
paper · doi:10.48550/arxiv.2505.17889
We performed calorimetric and torsion stress relaxation measurements upon linear heating of six conventional and high-entropy metallic glasses with the mixing entropy ΔSmix ranging from 0.86R to 1.79R (R is the universal gas constant). It is shown that high-entropy metallic glasses (ΔSmix > 1.5 R) exhibit significantly greater resistance to stress relaxation. Based on calorimetric data, we calculated the excess entropy of glass relative to the counterpart crystalline state and introduced an entropy-based dimensionless parameter ΔS, which characterizes the rise of the entropy and structural disordering of glass in the supercooled liquid region. It is shown that the depth of stress relaxation at a given temperature decreases with ΔSmix but increases with ΔS. Possible reasons for this relationship are discussed.