On the origin of the shear modulus change and heat release upon crystallization of metallic glasses

2015 ◽  
Vol 411 ◽  
pp. 1-4 ◽  
Author(s):  
N.P. Kobelev ◽  
V.A. Khonik ◽  
G.V. Afonin ◽  
E.L. Kolyvanov
Keyword(s):  
Shear Modulus ◽  
Heat Release ◽  
Metallic Glasses

Universal relationship between crystallization-induced changes of the shear modulus and heat release in metallic glasses

2016 ◽  
Vol 115 ◽  
pp. 204-209 ◽  
Author(s):  
G.V. Afonin ◽  
Yu.P. Mitrofanov ◽  
A.S. Makarov ◽  
N.P. Kobelev ◽  
W.H. Wang ◽  
...  
Keyword(s):  
Shear Modulus ◽  
Heat Release ◽  
Metallic Glasses ◽  
Universal Relationship ◽  
Induced Changes

scholarly journals Metallic Glasses: A New Approach to the Understanding of the Defect Structure and Physical Properties

Metals ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 605 ◽  
Author(s):  
Vitaly Khonik ◽  
Nikolai Kobelev
Keyword(s):  
Shear Modulus ◽  
Physical Properties ◽  
Experimental Verification ◽  
Metallic Glasses ◽  
Structural Relaxation ◽  
Defect Structure ◽  
Relaxation Phenomena ◽  
Volume Changes ◽  
New Approach ◽  
Heat Effects

The work is devoted to a brief overview of the Interstitialcy Theory (IT) as applied to different relaxation phenomena occurring in metallic glasses upon structural relaxation and crystallization. The basic hypotheses of the IT and their experimental verification are shortly considered. The main focus is given on the interpretation of recent experiments on the heat effects, volume changes and their link with the shear modulus relaxation. The issues related to the development of the IT and its relationship with other models on defects in metallic glasses are discussed.

Predicting temperature dependence of the shear modulus of metallic glasses using calorimetric data

2019 ◽  
Vol 168 ◽  
pp. 10-13 ◽  
Author(s):  
A.S. Makarov ◽  
Yu.P. Mitrofanov ◽  
G.V. Afonin ◽  
N.P. Kobelev ◽  
V.A. Khonik
Keyword(s):  
Shear Modulus ◽  
Temperature Dependence ◽  
Metallic Glasses ◽  
Calorimetric Data

Densification-induced heat release upon structural relaxation of Zr-based bulk metallic glasses

2016 ◽  
Vol 448 ◽  
pp. 31-35 ◽  
Author(s):  
Yu.P. Mitrofanov ◽  
K. Csach ◽  
A. Juríková ◽  
J. Miškuf ◽  
W.H. Wang ◽  
...  
Keyword(s):  
Heat Release ◽  
Metallic Glasses ◽  
Structural Relaxation ◽  
Bulk Metallic Glasses

Shear modulus and compliance in the range of the dynamic glass transition for metallic glasses

1998 ◽  
Vol 5 (1) ◽  
pp. 1-5 ◽  
Author(s):  
K. Schröter ◽  
G. Wilde ◽  
R. Willnecker ◽  
M. Weiss ◽  
K. Samwer ◽  
...  
Keyword(s):  
Glass Transition ◽  
Shear Modulus ◽  
Metallic Glasses

On the nature of heat effects and shear modulus softening in metallic glasses: A generalized approach

2014 ◽  
Vol 115 (3) ◽  
pp. 033513 ◽  
Author(s):  
N. P. Kobelev ◽  
V. A. Khonik ◽  
A. S. Makarov ◽  
G. V. Afonin ◽  
Yu. P. Mitrofanov
Keyword(s):  
Shear Modulus ◽  
Metallic Glasses ◽  
Heat Effects

scholarly journals Elastic Properties and Glass Forming Ability of the Zr50Cu40Ag10 Metallic Alloy

2020 ◽  
Vol 310 ◽  
pp. 145-149 ◽  
Author(s):  
Ramil M. Khusnutdinoff ◽  
Anatolii V. Mokshin
Keyword(s):  
Glass Transition ◽  
Shear Modulus ◽  
Temperature Dependence ◽  
Elastic Properties ◽  
Metallic Glasses ◽  
Liquid Glass ◽  
Glass Forming Ability ◽  
Metallic Alloy ◽  
Poisson's Ratio ◽  
Glass Forming

The elastic properties of the Zr50Cu40Ag10 metallic alloy, such as the bulk modulus B, the shear modulus G, the Young’s modulus E and the Poisson’s ratio σ, are investigated by molecular dynamics simulation in the temperature range T=250–2000 K and at an external pressure of p=1.0 bar. It is shown that the liquid–glass transition is accompanied by a considerable increase in the shear modulus G and the Young’s modulus E (by more than 50%). The temperature dependence of the Poisson’s ratio exhibits a sharp fall from typical values for metals of approximately 0.32–0.33 to low values (close to zero), which are characteristic for brittle bulk metallic glasses. Non-monotonic temperature dependence of the longitudinal and transverse sound velocity near the liquid-glass transition is also observed. The glass forming ability of the alloy is evaluated in terms of the fragility index m. Its value is m≈64 for the Zr50Cu40Ag10 metallic glass, which is in a good agreement with the experimental data for the Zr-based metallic glasses.

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