Equal Channel Angular Extrusion Characteristics on Mechanical Behavior of Aluminum Alloy

Abstract

Materials strengthened by conventional methods such as strain hardening, solute additions, precipitation and grain size refinement are often adopted in industrial processes. But there is limitation to the amount of deformation that these conventional methods can impact to a material. This study focused on the review of major mechanical properties of aluminum alloys in the presence of an ultrafine grain size into polycrystalline materials by subjecting the metal to an intense plastic straining through simple shear without any corresponding change in the cross-sectional dimensions of the sample. The effect of the heavy strain rate on the microstructure of aluminum alloys was in refinement of the coarse grains into ultrafine grain size by introducing a high density of dislocations and subsequently re-arranging the dislocations to form an array of grain boundaries. Hence, this investigation is aimed at gathering contributions on the influence of equal channel angular extrusion toward improving the mechanical properties of the aluminum alloys through intense plastic strain.

Twin parallel channel angular extrusion as a development of ECAE in parallel channels

“…ECAE is one of the most well developed SPD processing techniques in which the material is deformed through a die with two channels intersecting at a certain angle, which is described completely in previous reports [25,26]. This technique came into use in order to produce UFG materials with unique mechanical properties in recent years [27][28][29][30], and it can be said that among all of the SPD processing techniques, ECAE provides the opportunity to develop processing routes and invoke different slip systems very well [31]. In order to eliminate the limitations, like removing and reinserting the samples for the following passes, of this technique, some modifications were carried out.…”