Anelastic behaviour of materials under multiaxial strains: Pt. 2

Data on Poisson's ratio as a function of temperature, obtained in rods and tubes of Zircaloy-4 through dynamic measurements in longitudinal excitations, are presented. The influence of texture and the contribution of a coupling between longitudinal and transverse vibrations on the observed temperature dependence of this elastic constant, is discussed. Finally, an anelastic effect produced by relaxation of Poisson's ratio, in the temperature region between 400 and 450 K, is also presented. This effect is present only in tubular specimens and it is discussed in terms of a theory of anelastic relaxation under multiaxial strains. (author)