Amplitude-dependent internal friction and similarity of temperature dependences of microflow and macroflow stresses of a crystal

2000 ◽  
Vol 42 (4) ◽  
pp. 706-711 ◽  
Author(s):  
G. A. Malygin
Keyword(s):  
Internal Friction ◽  
Temperature Dependences

scholarly journals Internal Friction in the Ferroelectric – Ferromagnetic Composites

2013 ◽  
Vol 58 (4) ◽  
pp. 1327-1330 ◽  
Author(s):  
R. Zachariasz ◽  
J.A. Bartkowska ◽  
D. Bochenek ◽  
P. Niemiec
Keyword(s):  
Experimental Data ◽  
Internal Friction ◽  
High Temperatures ◽  
Domain Walls ◽  
Ferroelectric Domain ◽  
Temperature Dependences ◽  
Friction Measurements ◽  
Theoretical Considerations

Abstract In the work, temperature Q-1(T) and amplitude Q-1(") dependences of internal friction for ferroelectric - ferromagnetic composites on the base of the PZT and ferrite were determined. The temperature dependences of internal friction Q-1 reveal the peak in the range of high temperatures. We have investigated the peak associated with the viscous-elastic mobility of ferroelectric domain walls. The internal friction due to the viscous-elastic mobility of ferroelectric domain walls was calculated and compared with the experimental data in the reference to the Wang’s theory. Based on internal friction measurements and theoretical considerations, the peak was described. Additionally the amplitude (isothermal) Q-1(") dependences for the composites were made. This allowed for the interpretation of the maximum observed on the temperature dependences of the internal friction Q-1(T).

Temperature dependences of the Young's modulus and internal friction of heat-treated silicon

1970 ◽  
Vol 13 (3) ◽  
pp. 366-370
Author(s):  
L. N. Aleksandrov ◽  
M. I. Zotov ◽  
F. L. �del'man
Keyword(s):  
Internal Friction ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Heat Treated ◽  
Temperature Dependences

scholarly journals Determination of temperature dependences of Young's modulus and internal friction of fuel cladding by resonance method

2019 ◽  
Vol 277 ◽  
pp. 03011
Author(s):  
A A Moshev ◽  
S P Martynenko ◽  
S S Martynenko ◽  
E M Kudryavtsev ◽  
A N Ableyev ◽  
...  
Keyword(s):  
Internal Friction ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Resonance Method ◽  
Temperature Dependences ◽  
Computer Codes ◽  
Measuring Module ◽  
Cladding Material ◽  
Elastic Characteristics

We study elastic characteristics and internal friction of fuel claddings to improve computer codes for VVER-1000 fuel rods. We analytically described elastic characteristics of cladding material and obtained coefficient of the form of the first longitudinal frequency numerically. We described new measuring module for automatic acquisition data. We’ve established temperature dependences of Young’s modulus and internal friction via high-temperature facility and developed electronic module and noted maximum of these characteristics at the temperature 1160 K. It can be explained by the destruction of the texture in the material of claddings.

scholarly journals Упругие свойства монокристалла FeGe-=SUB=-2-=/SUB=-

2019 ◽  
Vol 61 (7) ◽  
pp. 1336
Author(s):  
Р.И. Зайнуллина ◽  
М.А. Миляев
Keyword(s):  
Phase Transitions ◽  
Internal Friction ◽  
Sound Wave ◽  
Magnetic Phase ◽  
Magnetic Phase Transitions ◽  
Abrupt Decrease ◽  
Wave Velocities ◽  
Incommensurate Magnetic Structure ◽  
Temperature Dependences ◽  
Crystallographic Axes

The results of the investigation of temperature dependences of longitudinal and torsional sound wave velocities and the internal friction of FeGe2 tetragonal single crystal along [100], [110] and [001] crystallographic axes have been presented. At temperatures of magnetic phase transitions of T1≈263 K and T2≈289 K an abrupt decrease of sound velocities is observed. The profound anisotropy of the internal friction is detected in the region of the existence of incommensurate magnetic structure (T1≤T≤T2).

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