A study of the peaking effect in a hexagonal structure metal: Magnesium

Minier, C.; Lauzier, J.; Esnouf, C.; Fantozzi, Gilbert

doi:10.1002/pssa.2210710212

Cited by 4 publications

(1 citation statement)

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“…During experiments at 800 Hz B, and B, are observed around 60 and 120 K and after annealing a t 250 K a small peak is seen near 20 K which has been associated to n, [3]. After heating the sample up to 500 K, a very high damping is present at low temperature as in low frequency measurements and a peak can be distinguished in the range 10 to 22 K which has been previously thought to be II, [4].…”

Section: Introductionmentioning

confidence: 78%

Internal Friction at Low Temperature in High Purity Magnesium

Fantozzi¹,

Esnoitf²,

Lauzieb³

et al. 1984

Phys. Stat. Sol. (a)

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Ultra pure magnesium exhibits at very low temperatures an interesting new damping phenomena after plastic deformation. A peak II1 appears at 15 K in the cycle range, after annealing at 270 K. This peak is attributed to an interaction between geometrical kinks and vacancy‐type defects created by cold‐work or irradiation. In the kilocycle experiments, a new peak D1 appears between 11 and 22 K. This peak is connected to a thermomechanical unpinning of kinks from vacancies or impurities. This peak is probably related to the decrease of internal friction in the cycle range between 10 and 30 K.

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Section: Introductionmentioning

confidence: 78%

Internal Friction at Low Temperature in High Purity Magnesium

Fantozzi¹,

Esnoitf²,

Lauzieb³

et al. 1984

Phys. Stat. Sol. (a)

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Optimal sample shape for internal friction measurements using a dual cantilevered beam

Baur

Kulik

1985

Journal of Applied Physics

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An optimal shape for internal friction measurements using a dual cantilevered beam is described. The new shape is analyzed by a finite element method, in order (a) to optimize its parameters to reduce parasitic interactions with the sample holder, and (b) to calculate the stress distribution in the vibrating sample. The numerical analysis shows that the interactions between the sample and its holder are much weaker for the new shape than for the classical flexural vibration of a simple cantilevered beam. The predictions of the numerical analysis are compared to experimental results on a niobium sample at low temperature.

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