Microstructure and texture evolution during accumulative roll bonding of aluminium alloys AA2219/AA5086 composite laminates

Abstract

Accumulative roll bonding of two aluminium alloys, AA2219 and AA5086 was carried out up to 8 passes. During the course of ARB, the deformation inhomogeneity between the two alloy layers results in interfacial instability after the 4th pass, necking of the AA5086 layers after the 6th pass and fracture along the necked regions after the 7th and 8th pass. The EBSD analysis shows deformation bands along the interfaces after 8 passes of ARB. The ARBprocessed materials predominantly show characteristic deformation texture components. The weak texture after the 2nd pass results from the combination of a weakly-textured starting AA2219 layer and a strongly-textured starting AA5086 layer. A strong deformation texture forms due to the high imposed strain after a higher number of ARB passes. Subgrain formation and related shear banding induces copper/S components in the case of the small elongated grains, while planar slip leads to the formation of brass component in the large elongated grains.

Analysis of through-thickness heterogeneities of microstructure and texture in nickel after accumulative roll bonding

“…The rolling texture components are represented in this work by the Brass "Bs" {110}<112>, S {123}<634>, Copper "Cu" {112}<111> and Dillamore "D" {4 4 11}<11 11 8> orientations. The latter component is considered in this work along with the standard orientations of the rolling texture because it has been previously shown to be an important texture component in ARB-processed materials [12,14,24,25]. Shear texture components are represented by the {100}<011>, {111}<011>, {111}<112> and {112}<110> components [26].…”

Fabrication of Al/Mg/Al Composites via Accumulative Roll Bonding and Their Mechanical Properties

“…At present, ARB process has been successfully applied to produce multilayer sheet materials, including Al/Al, Al/IF steel, Al/Cu, Cu/Zn and Al/SiC p composites [13,14,15,16,17,18,19]. All of these metals possess excellent ductility so that they can continuously maintain more compatible deformation until high cycles without necking.…”

Fabrication of ultra-thin nanostructured bimetallic foils by Accumulative Roll Bonding and Asymmetric Rolling

“…This allows optimizing the properties of the product based on those of two or more alloys17. The ARB technique has been used to fabricate products with composite layers of materials, such as Al/Cu/Ni18, Al/Mg19, and different series of aluminium alloys20212223. Roy et al2021 used the ARB technique to produce AA2219/AA5086 laminates.…”