Theory of the snoek effect in ternary B.C.C. alloys

Abstract

The Snoek effect of interstitial atoms in the ordered, body-centred cubic lattice (the CsCl type lattice) is considered. In this structure an exact solution of the problem is possible in contrast to the case of dilute alloys discussed in previous papers. The rate equations and expressions for the internal friction are derived for three kinds of applied stress: pure shear stress, and 〈111〉 or 〈100〉 tensile stress.

The relationship between the probability of occupation of various sites by interstitial atoms and the relaxational normal modes is discussed for the shear stress case. It is concluded that decomposition of the damping spectrum into Debye peaks has little physical significance.