Non-isothermal stress relaxation in conventional and high-entropy metallic glasses and its relationship to themixing and excess entropy

G. V. Afonin; S. L. Scherbakov; R. A. Konchakov; N. P. Kobelev; J. B. Cui; J. C. Qiao; V. A. Khonik

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arXiv · 2505.17889

Non-isothermal stress relaxation in conventional and high-entropy metallic glasses and its relationship to themixing and excess entropy

G. V. Afonin·S. L. Scherbakov·R. A. Konchakov·N. P. Kobelev·J. B. Cui·J. C. Qiao·V. A. Khonik

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Abstract

We performed calorimetric and torsion stress relaxation measurements upon linear heating of six conventional and high-entropy metallic glasses with the mixing entropy {\Delta}Smix ranging from 0.86R to 1.79R (R is the universal gas constant). It is shown that high-entropy metallic glasses ({\Delta}Smix > 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 {\Delta}S, 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 {\Delta}Smix but increases with {\Delta}S. Possible reasons for this relationship are discussed.

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G. V. Afonin, S. L. Scherbakov, R. A. Konchakov, N. P. Kobelev, J. B. Cui, J. C. Qiao, V. A. Khonik. 2025-05-23. Non-isothermal stress relaxation in conventional and high-entropy metallic glasses and its relationship to themixing and excess entropy. https://arxiv.org/abs/2505.17889

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