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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Scripta Materialia, Elsevier, 2014, 72-73, pp.59-62. 〈10.1016/j.scriptamat.2013.10.020〉
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https://hal-emse.ccsd.cnrs.fr/emse-01066966
Contributeur : Géraldine Fournier-Moulin <>
Soumis le : lundi 22 septembre 2014 - 16:48:27
Dernière modification le : mercredi 12 septembre 2018 - 01:27:27

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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, Elsevier, 2014, 72-73, pp.59-62. 〈10.1016/j.scriptamat.2013.10.020〉. 〈emse-01066966〉

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