[en] Hot-rolled AA1050 commercial pure aluminum was deformed by ECAP (Equal Channel Angular Pressing) at room temperature following route BC for 8 passes. Mechanical testing at room temperature on both hot-rolled aluminum and aluminum after ECAP consisted of uniaxial tension, axisymmetric compression and shear by torsion. The phenomenological Hill’s criterion identified from texture data accounts for the observed tension-compression asymmetry due to ECAP and predicts torsion yielding close to measurements. FE simulations of the compression tests are performed with a Hill model or a Minty micro-macro model and coupled with an isotropic Voce saturation hardening law. These simulations compute the inhomogeneous behavior due to barreling, the observed sample anisotropy and the force-displacement curve. Comparisons of numerical and experiments results provide a first identification of the hardening parameters and the friction coefficient during compression tests.
Disciplines :
Civil engineering
Author, co-author :
Poortmans, Stijn
El Houdaigui, Fouad
Habraken, Anne ; Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Verlinden, Bert
Language :
English
Title :
Inhomogeneous and anisotropic deformation behavior and strain hardening of ultrafine-grained aluminium by ECAP
Publication date :
2006
Event name :
Ultrafine Grained Materials IV
Event organizer :
TMS (The Minerals, Metals & Materials Society)
Event date :
2006
Audience :
International
Main work title :
Proceedings of the Ultrafine Grained Materials IV Conference
