Article ID Journal Published Year Pages File Type
7913810 Scripta Materialia 2014 4 Pages PDF
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 −0.5, which is the Hall-Petch relation. In copper, a uniform dislocation density without geometrically necessary dislocations is valid for this state.
Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
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