Abstract
The internal friction Q −1 of annealed copper and α-brass wires containing 10, 20, 30 and 35 at. % of zinc was studied by a torsional oscillation method during plastic deformation. The results are interpreted in terms of two theoretical models ascribing the amplitude-dependent internal friction, observed in the pre-yield stage, to coupling of the cyclic stress with the creep component of the deformation, and the amplitude-independent internal friction at larger, plastic, strains to losses arising from contributions of the torsional stress to the plastic deformation. Up to the maximum tensile strain of 1 % used in the experiments, the influence of zinc content on Q −1 is not pronounced.
Similar content being viewed by others
References
P. Feltham, Brit. J. Appl. Phys. 17 (1966) 1127.
V. S. Postnikov, Fiz. Tverd. Tela 7 (1966) 3652.
T. S. Ke, P. T. Yung, and C. C. Chang, Sci. Rec. Acad. Sin. 1 (1957) 231.
P. Feltham and G. J. Copley, Acta Met. 6 (1958) 542.
P. Feltham, Phil. Mag. 8 (1963) 989.
F. P. Bullen and S. M. Cousland, Phys. Stat. Sol. 27 (1968) 501.
D. Munz and E. MacHerauch, Z. Metallk. 57 (1966) 442.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Feltham, P., Newham, C.R. Internal friction in copper and α-brasses during plastic deformation. J Mater Sci 4, 170–173 (1969). https://doi.org/10.1007/BF00550658
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00550658