Dear Sumit,

I think snoek effect is related with hydrostatic relaxation and orientation.

relaxation.

Interstitial atoms in ternary b.c.c. alloys exhibit hydrostatic relaxation, if an applied stress has a dilatational stress component. The effect is absent in binary alloys. Hydrostatic relaxation, in contrast to orientation relaxation effect, involves long-range diffusion; in order to understand various aspects of the process. The Snoek relaxation is associated with the redistribution of interstitial atoms in the bcc lattice under the application of the oscillatory stress. Addition of substitutional solutes introduces new peaks or broadening of the normal snoek peak. The relaxation due to interstitial solutes in bcc metals is often affected markedly by the presence of a small amount of substitutional solute atoms. This effect may be originated from the interaction between the substitutional and interstitial solute atoms, or the s-i interaction.

Example, damping of steel tuning forks goes through a maximum as a function of temperature and that the location of this maximum is dependent upon the frequency of the fork.

Ashish