Anelastic relaxation due to Ti–H complexes in Nb–Ti alloys
- 27 September 1982
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 46 (3), 483-494
- https://doi.org/10.1080/01418618208239573
Abstract
The internal-friction spectrum of the Nb–2 at.% Ti–H and Nb–5 at.% Ti–H systems has been investigated in the temperature range 60–300 K, exciting the flexural vibrations of the specimens at 20 kHz, for hydrogen concentrations varying between 0·15 and 4·2 at.%. Electrical resistivity and density measurements have also been performed in the specimens at room temperature. Two internal-friction peaks appear below 150 K, a well-pronounced peak and a secondary peak placed at a lower temperature. Increasing the hydrogen concentration has a dual effect on the main peak, a monotonic enhancement of its height and its shift towards lower temperatures down to a saturation value. The secondary peak presents similar features though its height and temperature shift appear to saturate more rapidly. A tentative model is proposed to explain the complex phenomenology of the relaxation maxima.Keywords
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