The influence of hydrogen and dislocations on the internal friction in yttrium

The internal friction spectra of (i) plastically deformed Y, (ii) undeformed H-doped YH 0.1 and (iii) plastically deformed and H-doped YH 0.1 samples were measured with the help of the vibrating reed technique (polycrystalline foils, 5 K ⩽ T ⩽ 320 K, frequencies f between 100 and 1300 Hz, plastic de...

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Published inJournal of alloys and compounds Vol. 211; pp. 249 - 252
Main Authors Kappesser, B., Wipf, H., Barnes, R.G., Beaudry, B.J.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.09.1994
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Summary:The internal friction spectra of (i) plastically deformed Y, (ii) undeformed H-doped YH 0.1 and (iii) plastically deformed and H-doped YH 0.1 samples were measured with the help of the vibrating reed technique (polycrystalline foils, 5 K ⩽ T ⩽ 320 K, frequencies f between 100 and 1300 Hz, plastic deformations between 5% and 25% due to rolling at room temperature). The deformed (undoped) Y samples exhibit an internal friction peak in the same temperature range as the undeformed doped YH 0.1 samples. We found further that combined plastic deformation and H-doping leads to a stronger peak than does sole deformation or H doping. The possible mechanisms for the observed relaxation process are discussed.
ISSN:0925-8388
1873-4669
DOI:10.1016/0925-8388(94)90494-4