Determination of the activation energy spectrum of structural relaxation in metallic glasses using calorimetric and shear modulus relaxation data

2014 ◽  
Vol 116 (12) ◽  
pp. 123507 ◽  
Author(s):  
A. N. Tsyplakov ◽  
Yu. P. Mitrofanov ◽  
A. S. Makarov ◽  
G. V. Afonin ◽  
V. A. Khonik
Keyword(s):  
Activation Energy ◽  
Energy Spectrum ◽  
Shear Modulus ◽  
Metallic Glasses ◽  
Structural Relaxation ◽  
Relaxation Data

An Acoustic Study of Irreversible Structural Relaxation in a Bulk Metallic Glass

2006 ◽  
Vol 115 ◽  
pp. 113-120 ◽  
Author(s):  
N.P. Kobelev ◽  
E.L. Kolyvanov ◽  
V.A. Khonik
Keyword(s):  
Heat Treatment ◽  
Activation Energy ◽  
Energy Spectrum ◽  
Shear Modulus ◽  
Structural Relaxation ◽  
Glass Structure ◽  
Torsion Pendulum ◽  
Frequency Range ◽  
Acoustic Study ◽  
Frequency Temperature

Irreversible structural relaxation of bulk amorphous Zr52.5Ti5Cu17.9Ni14.6Al10 was studied by means of logarithmic decrement and shear modulus measurements using an inverse torsion pendulum in the frequency range from 5 Hz to 40 Hz. Irreversible contributions to the decrement and shear modulus and their frequency, temperature, and time dependences were investigated. The activation energy spectrum of irreversible structural relaxation has been reconstructed. It has been shown that irreversible structural relaxation can be regenerated by a special heat treatment. The results obtained are discussed within the framework of a phenomenological model, which implies existence of two-well relaxation centers in the glass structure.

Determination of Activation Energy Spectrum for Fe40Ni40B20 Metallic Glasses

1998 ◽  
Vol 282-283 ◽  
pp. 33-36
Author(s):  
P. Tomić ◽  
M. Davidović ◽  
B. Arsenijević
Keyword(s):  
Activation Energy ◽  
Energy Spectrum ◽  
Metallic Glasses

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.

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