https://hdl.handle.net/11256/87 Experimental data on elasticity 2026-04-11T11:13:09Z https://hdl.handle.net/11256/84 Temperature Dependece of the Elastic Constants of Aluminum Tallon, J.L.; Wolfenden, A. The single crystal elastic constants of aluminum have been measured using a piezoelectric composite oscillator from room temperature to just 20K below the melting point. The elastic moduli differ markedly from previous high temperature results, but match in well with previous cryogenic results. Over the temperature range investigated the isothermal bulk modulus and the two shear moduli have a simple exponential dependence on isobaric volume, and the cryogenic data indicate this dependence may be preserved down to absolute zero. As has been found previously for a wide range of materials, the isothermal bulk modulus and the shear modulus (c11-c12)/2 appear to be continuous functions of volume through the melting expansion, and melting seems to find its origin in the mechanical insanity associated with this shear modulus vanishing at the volume of the melt at the freezing point. Gruneisen's parameter divided by the molar volume is very nearly independent of isobaric volume. 1979-03-02T00:00:00Z https://hdl.handle.net/11256/83 The High Temperature Elastic Moduli of Aluminum Gerlich, D; Fisher, E.S. Measurements of the elastic moduli of aluminum over the temperature range 300°–930°K are reported. These data together with those reported for T < 300°K, show that all elastic moduli, including the shear moduli, vary smoothly with the temperature, up to the melting point, in contrast to other measurements at lower ultrasonic frequencies. From the data, a high temperature Grüneisen constant of 2·17 is calculated. The temperature dependence of the shear moduli at room temperature is calculated from Leigh's model, and the results of this calculation are compared with the experimentally determined data, and with the pressure dependence of the elastic moduli. 1968-11-04T00:00:00Z https://hdl.handle.net/11256/82 The composite piezoelectric oscillator is employed to measure the adiabatic elastic moduli of crystalline aluminum over the temperature interval 63°K to 773°K. Sutton, Paul M. The composite piezoelectric oscillator is employed to measure the adiabatic elastic moduli of crystalline aluminum over the temperature interval 63'K to 773 K. The data permit a valid extrapolation to O'K. The Debye characteristic temperature of aluminum at O'K, computed with these data, is 439'K. Various novel procedures designed to facilitate the use of the method are described. 1953-04-28T00:00:00Z https://hdl.handle.net/11256/79 Temperature Variation of the Elastic Constants of Cubic Elements. I. Copper Overton, W.C.; Gaffney, John The ultrasonic pulse technique has been used in conjunction with a specially devised cryogenic technique to measure the velocities of 10-Mc/sec acoustic waves in copper single crystals in the range from 4.2°K to 300°K. The values and the temperature variations of the elastic constants have been determined. The room temperature elastic constants were found to agree well with those of other experimental works. Fuchs' theoretical c44 at 0°K is 10 percent larger than our observed value but his theoretical c11, c12, K and (c11−c12) agree well with the observations. The isotropy, (c11−c12)2c44, was observed to remain practically constant from 4.2°K to 180°K, then to diminish gradually at higher temperatures. Some general features of the temperature variations of elastic constants are discussed. 1954-09-08T00:00:00Z