11 papers
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 +4
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…
Relationship of structural disorder and stability of supercooled liquid state with glass-forming ability of metallic glasses
J. B. Cui, R. A. Konchakov, G. V. Afonin +5
We performed calorimetric studies of 26 metallic glasses and calculated the excess entropy and excess enthalpy with respect to their counterpart crystals. On this basis, we introdu…
On the nature of the glass transition in metallic glasses after deep relaxation
A. S. Makarov, G. V. Afonin, R. A. Konchakov +3
We performed parallel study of calorimetric and high-frequency shear modulus behavior of Zr-based metallic glasses after deep relaxation just below the glass transition. It is show…
Relationship between the shear moduli and defect-induced structural relaxation ofhigh-entropy metallic glasses
Andrey Makarov, Evgenia Gonchrova, Jichao Qiao +2
We performed high-frequency shear modulus and calorimetry measurements on seven high-entropy metallic glasses (HEMGs) in the initial, relaxed and crystalline states. It is shown th…
Relationship between the shear modulus and volume relaxation in high-entropy metallic glasses: experiment and physical origin
R. S. Khmyrov, A. S. Makarov, J. C. Qiao +2
We performed parallel measurements of the high-frequency shear modulus and relative volume for high-entropy TiZrHfBeCu and TiZr…
Fast relaxation in metallic glasses studied by measurements of the internal friction at high frequencies
G. V. Afonin, J. C. Qiao, A. S. Makarov +2
We performed high-frequency (0.4 to 1.7 MHz) measurements of the internal friction (IF) on 14 bulk metallic glasses (MGs). It is found that 12 of these MGs display relaxation IF pe…
Relation of the thermodynamic parameter of disordering with the width of structure factor and defect concentration in a metallic glass
G. V. Afonin, A. S. Makarov, R. A. Konchakov +4
In this work, we show that above the glass transition there exists a strong unique interrelationship between the thermodynamic parameter of disorder of a metallic glass derived usi…
Effect of the entropy on the shear viscosity of metallic glasses near the glass transition
A. S. Makarov, J. B. Cui, J. C. Qiao +3
We measured the shear viscosity of 14 metallic glasses differing with their mixing entropy . It is found that the viscosity at the glass transition temperature sign…
Dimensionless parameter of structural ordering and excess entropy of metallic and tellurite glasses
A. S. Makarov, G. V. Afonin, R. A. Konchakov +4
Using a notion on the excess entropy of glass with respect to the counterpart crystal, we introduce a simple dimensionless order parameter , which changes from …
Critical behavior of the fluctuation heat capacity near the glass transition of metallic glasses
R. A. Konchakov, A. S. Makarov, G. V. Afonin +4
The high-frequency shear modulus of five Zr-, Pd-, Cu-based conventional and two high-entropy bulk metallic glasses was measured in a wide temperature range up to the beginning of…
Defect-induced ordering and disordering in metallic glasses
A. S. Makarov, G. V. Afonin, R. A. Konchakov +4
On the basis of shear modulus measurements on a Pt-based glass, we calculated temperature dependence of the defect concentration c using the Interstitialcy theory. This temperature…