Diffusion in Ultrafine Grained Materials

Abstract:

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The paper provides an overview of recent results of the radiotracer investigations of short-circuit diffusion in ultra fine grained (UFG) materials produced by severe plastic deformation (SPD). Different material classes (copper of different purity levels and Cu alloys) are considered. The study is focused on the existence of non-equilibrium grain boundaries after SPD. Although a dominant contribution of common high-angle grain boundaries with very similar diffusivities as those in the corresponding coarse-grained material is established, much faster diffusion rates are also observed experimentally. The nature and kinetic properties of these “high mobility” paths in different materials are investigated and critically discussed.

Info:

Periodical:

Materials Science Forum (Volumes 584-586)

Edited by:

Yuri Estrin and Hans Jürgen Maier

Pages:

1012-1017

DOI:

10.4028/www.scientific.net/MSF.584-586.1012

Citation:

S. V. Divinski and G. Wilde, "Diffusion in Ultrafine Grained Materials", Materials Science Forum, Vols. 584-586, pp. 1012-1017, 2008

Online since:

June 2008

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Price:

$35.00

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