Extension of the Derby relation to metals severely deformed to their steady-state ultrafine-grain size - Mines Saint-Étienne Access content directly
Journal Articles Scripta Materialia Year : 2014

Extension of the Derby relation to metals severely deformed to their steady-state ultrafine-grain size

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. (C) 2013 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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emse-01066966 , version 1 (22-09-2014)

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Arnaud Pougis, L.S. Toth, Jean-Jacques Fundenberger, András Borbély. Extension of the Derby relation to metals severely deformed to their steady-state ultrafine-grain size. Scripta Materialia, 2014, 72-73, pp.59-62. ⟨10.1016/j.scriptamat.2013.10.020⟩. ⟨emse-01066966⟩
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