Temperature Dependence of the Elastic Constants of Gallium

1975 ◽  
Vol 53 (6) ◽  
pp. 581-582 ◽  
Author(s):  
T. J. Langill ◽  
J. Trivisonno
Keyword(s):  
Single Crystal ◽  
Temperature Dependence ◽  
Elastic Constants ◽  
High Purity ◽  
Acoustic Waves ◽  
Ultrasonic Pulse ◽  
Pulse Echo

A modified ultrasonic pulse overlap technique was employed to measure the single crystal elastic constants of high purity gallium from 4.2 K to 190 K. The results are compared with data obtained by a technique which employed direct electromagnetic generation of acoustic waves as well as with earlier pulse echo measurements.

Elastic Constants in C-plane of Single Crystal Bi 2Sr 2Ca Cu 208 between 80 K and 260 K

1990 ◽  
Vol 193 ◽  
Author(s):  
Jin Wu ◽  
Yening Wang ◽  
Yifeng Yan ◽  
Zhongxian Zhao
Keyword(s):  
Shear Modulus ◽  
Single Crystal ◽  
Temperature Dependence ◽  
Elastic Constants ◽  
Wide Temperature Range ◽  
Sound Propagation ◽  
Anisotropic Elasticity ◽  
Ultrasonic Velocities ◽  
Temperature Range

ABSTRACTThe temperature dependence of the in-plane C11 C22. C12 and C66 modes between 80 and 260 K of superconducting crystals of Bi2Sr2Ca1Cu208 have been obtained via the measurements of ultrasonic-velocities. The anisotropic elasticity in the a-b plane of single crystal Bi2 Sr2Ca1Cu2O8 is manifest. The shear modulus of sound propagation along the [110] with the polarization has been also calculated and shows an overall trend of softening over a wide temperature range above Tc. The shear modulus C6 6 shows three obvious softening minima around 240–250 K, 150 K and 100 K.

Temperature Dependences of the Elastic Constants of Precipitation-Hardened Aluminum Alloys 2014 and 2219

1977 ◽  
Vol 99 (2) ◽  
pp. 181-184 ◽  
Author(s):  
D. T. Read ◽  
H. M. Ledbetter
Keyword(s):  
Aluminum Alloys ◽  
Shear Modulus ◽  
Bulk Modulus ◽  
Temperature Dependence ◽  
Elastic Properties ◽  
Elastic Constants ◽  
Ultrasonic Pulse ◽  
Young’S Moduli ◽  
Temperature Dependences ◽  
Sound Velocities

Elastic properties of precipitation-hardened aluminum alloys 2014 and 2219 were studied between 4 and 300 K using ultrasonic pulse techniques. Both the longitudinal and transverse sound velocities were measured. Also reported are the Young’s modulus, shear modulus, bulk modulus, and Poisson’s ratio. For both alloys, the Young’s moduli are about ten percent higher than for unalloyed aluminum, and they increase about ten percent on cooling from 300 to 4 K. All the elastic constants show normal temperature dependence.

Evaluation of Elastic Properties of CP Ti by Three Different Techniques

2015 ◽  
Vol 830-831 ◽  
pp. 195-198
Author(s):  
K. Saravanan ◽  
Bhal Sumit ◽  
P.L. Nithilaksh ◽  
P. Ramesh Narayanan
Keyword(s):  
Elastic Constants ◽  
Pure Titanium ◽  
Ultrasonic Pulse ◽  
Test Methods ◽  
Stressed Condition ◽  
Commercially Pure Titanium ◽  
Static Tensile ◽  
Titanium Grade ◽  
Cp Ti ◽  
Pulse Echo

Elastic constants are the fundamental key parameters in the mechanical behaviour of engineering materials under stressed condition. This paper explains the determination of elastic constants of commercially pure titanium (Grade-2) at ambient temperature using three independent test methods including quasi-static tensile test with strain gauged specimen, ultrasonic pulse echo method and resonance based impulse excitation technique. The results are statistically analysed and compared.

Single crystal elastic constants evaluated with surface acoustic waves generated and detected by lasers within polycrystalline steel samples

2016 ◽  
Vol 119 (4) ◽  
pp. 043103 ◽  
Author(s):  
D. Gasteau ◽  
N. Chigarev ◽  
L. Ducousso-Ganjehi ◽  
V. E. Gusev ◽  
F. Jenson ◽  
...  
Keyword(s):  
Single Crystal ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Surface Acoustic Waves

Temperature dependence of single-crystal elastic constants of Mo(Si,Al)2

1998 ◽  
Vol 6 (7-8) ◽  
pp. 607-611 ◽  
Author(s):  
K. Tanaka ◽  
K. Nawata ◽  
H. Inui ◽  
M. Yamaguchi ◽  
M. Koiwa
Keyword(s):  
Single Crystal ◽  
Temperature Dependence ◽  
Elastic Constants

Temperature Dependence of Single-Crystal Elastic Constants of Flux-Grown α-GaPO4

2009 ◽  
Vol 48 (11) ◽  
pp. 4988-4996 ◽  
Author(s):  
P. Armand ◽  
M. Beaurain ◽  
B. Rufflé ◽  
B. Menaert ◽  
P. Papet
Keyword(s):  
Single Crystal ◽  
Temperature Dependence ◽  
Elastic Constants

Effective elastic constants and acoustic properties of single-crystal TiN/NbN superlattices

1992 ◽  
Vol 7 (8) ◽  
pp. 2248-2256 ◽  
Author(s):  
Jin O. Kim ◽  
Jan D. Achenbach ◽  
Meenam Shinn ◽  
Scott A. Barnett
Keyword(s):  
Single Crystal ◽  
Elastic Constants ◽  
Acoustic Waves ◽  
Mass Density ◽  
Surface Acoustic Waves ◽  
Dispersion Curves ◽  
Acoustic Properties ◽  
Tetragonal Symmetry ◽  
Cubic Symmetry ◽  
Effective Elastic Constants

Using the measured elastic constants of TiN and NbN single crystals with cubic symmetry, the effective elastic constants of single-crystal TiN/NbN superlattice films with tetragonal symmetry, namely c11, c12, c13, c33, c44, and c66 have been calculated for various thickness ratios of the layers. Using a line-focus acoustic microscope, measurements of surface acoustic waves (SAWs) have been carried out on single-crystal TiN/NbN superlattice films grown on the (001) plane of cubic crystal MgO substrates. The phase velocities measured as functions of the angle of propagation display the expected anisotropic nature of cubic crystals. Dispersion curves of SAWs propagating along the symmetry axes have been obtained by measuring wave velocities for various film thicknesses and frequencies. The SAW dispersion curves calculated from the effectiveelastic constants and the effective mass density of the superlattice films show very good agreement with experimental results. The results of this paper exhibit no anomalous dependence of the elastic constants on the superlattice period of TiN/NbN superlattices.

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