Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7913810 | Scripta Materialia | 2014 | 4 Pages |
Abstract
It was documented by Derby in 1992 that the flow stress is in power-law relationship with the steady-state grain size obtained in dynamic recrystallization. This relation has been found valid in this paper also for ultrafine-grained metals that can be obtained by severe plastic deformation. For these materials, the exponent is â0.5, which is the Hall-Petch relation. In copper, a uniform dislocation density without geometrically necessary dislocations is valid for this state.
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Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
A. Pougis, L.S. Toth, J.J. Fundenberger, A. Borbely,