Abstract
Two devices for the direct measurement of the anelastic properties of metals in a reactor are described. First, a resonant cavity system has been adapted for the in-pile determination of dimensional changes, with application to strain relaxation measurements at and above room temperature. Second, an inverted torsion pendulum operated at 130 Hz at a constant amplitude has been devised for the study of internal friction in metals exposed to a fast neutron flux. The relevant detection systems and the mechanical arrangements for both apparatus are given, together with typical recorded curves.
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