Abstract
	The finite element method (FEM) is a proven and reliable technique for analyzing various forming processes, including a progressive technique like Equal Channel Angular Pressing (ECAP). ECAP is one of the severe plastic deformation (SPD) techniques, which is rather effective for producing ultrafine-grained (UFG) metals with enhanced mechanical and processing properties inherent in various ultrafine-grained materials. The plastic deformation behaviour of the materials during the ECAP process with a round die corner angle (90°) and a frictionless condition was investigated using a program DEFORM 2D (it is a FEM based process simulation system). The aluminium alloy EN AW 2014 was used as the workpiece material; the stress-strain relationship were derived both from experimental investigation and from DEFORM 2D database. The main aim of the present work was provided information concerning the distribution of effective strain, strain rates and temperatures in the aluminium alloy EN AW 2014. The simulation analyses of ECAP process of aluminium alloy EN AW 2014 by means of the DEFORM 2D shows that in term of prediction individual parameters during forming processing was in the some case (strain rate intensity and temperature) sensible different, providing that material characteristic were given by database or on the basis experimentally determined stress-strain curve. In this regard, is necessary to consider in the simulation process to appear from knowledge of material characteristic obtained by laboratory test of formability.