کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1759743 | 1019295 | 2010 | 6 صفحه PDF | دانلود رایگان |

We have measured the composition and temperature dependence of the shear moduli C′ and C44 for two-phase (α + β)- and single-phase β-PdHx. In the two-phase region, the α- and β-phases are coherent. Here, the composition dependence of C44 and C′ deviate negatively from a Vegard-type volume average. We attribute the deviations to two effects: (1) the partly in-series arrangement of the precipitate and matrix phases, relative to the externally applied stress, and (2) thermally activated anelastic relaxations involving the rapid motion of H interstitial atoms, leading to slight changes in the shape of coherent precipitates. The first effect is present for both C′ and C44 and is temperature-independent, whereas the second is present only for C′ and is strongly temperature-dependent.
Journal: Ultrasonics - Volume 50, Issue 2, February 2010, Pages 155–160