Internal friction in metallic materials : a handbook by M S Blanter; et al

By M S Blanter; et al

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Such ing to about 1012 jumps per second (V¨ extreme mobility and some other anomalies point to non-classical diffusion including quantum effects and tunneling (at least in bcc metals), but many details of the physics of hydrogen diffusion in different metallic structures are still not very clear. As concerns anelasticity, shorter relaxation times or lower peak temperatures are not the only consequence of this high hydrogen mobility. , cubic instead of tetragonal symmetry of the λ-tensor, Buchholz et al.

The Ti–O and Zr–O solid solutions have been most extensively studied. The existing information permits to summarise the main features of the relaxation process as follows: 1. The peak shape is close to a Debye peak both for polycrystals (Fuller and Miller 1977) and single crystals (Ritchie et al. , this is a process with a single relaxation time. 2. The peak height increases linearly with increasing interstitial concentration C in technical grade pure Zr (Gacougnolle et al. 1970, 1971) and Ti (Bleasdale and Bacon 1976).

Concentration dependence (wt%) of the carbon (1) and nitrogen (2) Snoek peak heights for iron. f = 1 Hz (Lenz and Dahl 1974) Fig. 7. The Fe samples were quenched from temperatures, at which the total C or N concentration in iron was within solubility in the α-solid solution. If a supersaturated solution decomposes, the height of the peak is determined by the concentration of interstitials remaining in solid solution. % (Weller et al. % (Ahmad and Szkopiak 1972). In high-purity metals, this boundary may be higher (Weller 2001).

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