Abstract
The second-order and third-order elastic constants for both single-crystal and polycrystalline columbium were determined at 298°K using an ultrasonic phase comparison method. It is shown that any dislocation contribution to the measurements is negligible with respect to other uncertainties. The third-order elastic constants (Brugger convention) in units of 1012 dyn/cm2 are c111=−25.64±0.25;c144=−3.43±0.10;ν1=−4.8±1.2;c112=−11.40±0.25;c166=−1.677±0.05;ν2=−3.70±0.2;c123=−4.67±0.25;c456=+1.366±0.05;ν3=+0.75±0.05.The Grüneisen parameter calculated from these values is 1.511±0.026 for the single crystal, and 1.546±0.092 for the polycrystal, in good agreement with the value 1.52 calculated from bulk-property measurements. The polycrystalline third-order elastic constants are in very good agreement with those calculated from the single-crystal values by the method of Chang.
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Dates
Type | When |
---|---|
Created | 21 years, 6 months ago (Feb. 9, 2004, 11:55 a.m.) |
Deposited | 1 year, 7 months ago (Feb. 1, 2024, 7:41 p.m.) |
Indexed | 3 months, 4 weeks ago (May 3, 2025, 6:22 p.m.) |
Issued | 57 years, 3 months ago (June 1, 1968) |
Published | 57 years, 3 months ago (June 1, 1968) |
Published Print | 57 years, 3 months ago (June 1, 1968) |
@article{Graham_1968, title={Third-Order Elastic Constants of Single-Crystal and Polycrystalline Columbium}, volume={39}, ISSN={1089-7550}, url={http://dx.doi.org/10.1063/1.1656726}, DOI={10.1063/1.1656726}, number={7}, journal={Journal of Applied Physics}, publisher={AIP Publishing}, author={Graham, L. J. and Nadler, H. and Chang, Roger}, year={1968}, month=jun, pages={3025–3033} }