The dispersion in the entire Brillouin zone and the temperature dependence(right up to the melting temperature) of the anharmonic frequency shift andphonon damping in a number of fcc metals is investigated on the basis ofmicroscopic calculations. It is found that the anharmonic effects dependsharply on the wave vector in the directions $\Gamma$-X, X-W, and $\Gamma$-Land, in contrast to bcc metals, the magnitude of the effects is not due to thesoftness of the initial phonon spectrum. It is shown that the relativefrequency shifts and the phonon damping near melting do not exceed 10-20%. Therelative role of various anharmonic processes is examined, and the relationbetween the results obtained and existing experimental data is discussed.
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