A phenomenological anisotropic description for dislocation storage and recovery processes in fcc crystals

► A constitutive law with anisotropic dislocation storage and annihilation is proposed. ► It predicts lower hardening for the Cube orientation during rolling in fcc metals. ► It can account for the influence of grains orientation on local hardening state. In order to account for the influence of the...

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Veröffentlicht in:Computational materials science 2012-03, Vol.54, p.97-100
Hauptverfasser: Bacroix, B., Brenner, R.
Format: Artikel
Sprache:eng
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Zusammenfassung:► A constitutive law with anisotropic dislocation storage and annihilation is proposed. ► It predicts lower hardening for the Cube orientation during rolling in fcc metals. ► It can account for the influence of grains orientation on local hardening state. In order to account for the influence of the crystallographic orientation on the mechanical behavior of fcc crystals, a constitutive hardening law is proposed which contains anisotropic terms for storage and annihilation of dislocations. By contrast with previous proposals, both kinetics depend on the geometry of active slip systems. It is shown that it can reproduce the orientation dependence of the critical annihilation distance in tension of fcc crystals as well as the hardening evolution within different crystalline orientations during rolling.
ISSN:0927-0256
1879-0801
DOI:10.1016/j.commatsci.2011.10.020