Torsion pendulum method to evaluate the internal friction and elastic modulus of films

2003 ◽  
Vol 74 (4) ◽  
pp. 2477-2480 ◽  
Author(s):  
Z. S. Li ◽  
Q. F. Fang ◽  
S. Veprek ◽  
S. Z. Li
Keyword(s):  
Elastic Modulus ◽  
Internal Friction ◽  
Torsion Pendulum

High-Temperature Mechanical Spectrometer for Internal Friction Measurements

2009 ◽  
Vol 423 ◽  
pp. 89-95 ◽  
Author(s):  
P. Simas ◽  
José San Juan ◽  
Robert Schaller ◽  
M.L. Nó
Keyword(s):  
Elastic Modulus ◽  
High Temperature ◽  
Internal Friction ◽  
Torsion Pendulum ◽  
Dynamic Shear ◽  
Shear Elastic Modulus ◽  
Computer Controlled ◽  
Friction Measurements ◽  
Structural Intermetallic ◽  
Different Parts

A new high temperature mechanical spectrometer, based on an inverted torsion pendulum, has been constructed for the measurement of the internal friction and the dynamic shear elastic modulus in two different working modes: (a) as a function of temperature (300 – 1800 K) at imposed frequency, during heating or cooling; and (b) as a function of frequency (10-3 – 10 Hz) in isothermal conditions. The whole installation is computer controlled by a dedicated software specifically developed. We describe the different parts of this new installation, as well as its performances in both temperature and frequency through an original example study on a high temperature structural intermetallic of Fe-Al.

Effect of a magnetic field on the elastic modulus and internal friction of alloy oKh27YU5A

1981 ◽  
Vol 13 (11) ◽  
pp. 1393-1396
Author(s):  
T. G. Kovaleva ◽  
A. D. Shevchuk ◽  
P. I. Tereshchenko
Keyword(s):  
Magnetic Field ◽  
Elastic Modulus ◽  
Internal Friction

Internal-friction and elastic-modulus anomalies of copper-2.1 at. % iron alloy at low temperature

1976 ◽  
Vol 33 (1) ◽  
pp. 338-344 ◽  
Author(s):  
J. M. Pelletier ◽  
R. Borrelly ◽  
P. F. Gobin
Keyword(s):  
Elastic Modulus ◽  
Low Temperature ◽  
Internal Friction ◽  
Iron Alloy

scholarly journals The Effect of Subsequent Stress-Induced Martensite Aging on the Viscoelastic Properties of Aged NiTiHf Polycrystals

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1890
Author(s):  
Anton I. Tagiltsev ◽  
Elena Y. Panchenko ◽  
Ekaterina E. Timofeeva ◽  
Yuriy I. Chumlyakov ◽  
Ekaterina S. Marchenko ◽  
...  
Keyword(s):  
Elastic Modulus ◽  
Martensitic Transformation ◽  
Internal Friction ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Viscoelastic Properties ◽  
Oriented Growth ◽  
Compressive Stresses ◽  
Significant Change

This study investigated the effect of stress-induced martensite aging under tensile and compressive stresses on the functional and viscoelastic properties in Ni50.3Ti32.2Hf17.5 polycrystals containing dispersed H-phase particles up to 70 nm in size obtained by preliminary austenite aging at 873 K for 3 h. It was found that stress-induced martensite aging at 428 K for 12 h results in the appearance of a two-way shape memory effect of −0.5% in compression and +1.8% in tension. Moreover, a significant change in viscoelastic properties can be observed: an increase in internal friction (by 25%) and a change in elastic modulus in tensile samples. The increase in internal friction during martensitic transformation after stress-induced martensite aging is associated with the oriented growth of thermal-induced martensite. After stress-induced martensite aging, the elastic modulus of martensite (EM) increased by 8 GPa, and the elastic modulus of austenite (EA) decreased by 8 GPa. It was shown that stress-induced martensite aging strongly affects the functional and viscoelastic properties of material and can be used to control them.

Sign in / Sign up

Export Citation Format

Share Document