Background Internal Friction in Metals Interpreted as a Soret Cross-Effect of Point Defect Diffusion
✍ Scribed by Capurro, M. ;Mezzasalma, S. A.
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 252 KB
- Volume
- 171
- Category
- Article
- ISSN
- 0031-8965
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✦ Synopsis
An explanation of previous experimental internal friction (IF) data on commercial metals and alloys has been looked for in an elasto-thermo-diffusional cross-effect generated by a Brownian motion of point defects in the lattice. At room temperature the Soret cross-term has been shown to exceed the contribution from thermal diffusion by some orders of magnitude. Accordingly, a dependence of IF on the phase velocity of elastic waves could be predicted, which fits the experimental data fairly good. This effect could be considered as a source of background, underlying other known effects which appear at different temperatures.