Comparative study of texture evolution in ARB processed AA2014, AA6063 and AA2014/6063 aluminium laminates

Abstract

Single phase aluminium laminates of AA6063, AA2014 and AA6063/AA2014 composites were produced by accumulative roll bonding processed up to 6 cycles. The microstructure and texture of the initial materials and the sheets after 6 cycles were studied using electron backscatter diffraction and X-ray diffraction, respectively. It is observed that 6 cycles lead to an ultrafine grained microstructure. In both the single phase laminates and the composite the texture consists of the typical components for rolling and shear deformation of face-centred cubic metals. For all texture components, the intensity in the composite is about the average of the intensities in the single phase laminates. Therefore, the deformation process in the individual layers of the composite is comparable with that in the single phase alloys. K e y w o r d s : aluminium alloys, accumulative roll bonding, texture, microstructure

Influence of homogenization on the microstructure, mechanical properties and texture of the twin-roll cast AA8006 sheet processed by accumulative roll-bonding

“…A similar grain refinement after 6 ARB cycles was achieved also for AA6063 and AA2014 alloy [16], AA5086 alloy [9], or AA3003 alloy [17]. The grain refinement is faster in the homogenized alloy ( Fig.…”

“…Thus, the final texture in the ARB sheet was mainly composed of Cu texture {112}<111>, through S texture (123)<634> to brass texture B {011}<211>. A similar texture evolution was found also for other Al alloys [8][9][10][16][17]. These textural changes during the ARB process contributed to the formation of HAGB.…”

“…The most important increase in strength and decrease of the elongation during the first ARB cycle was expected. It is typical for ARB processing of many Al based materials [8][9][10][16][17]. On the other hand, a slight increase of ductility during next ARB cycles involving higher equivalent strain is somewhat surprising.…”

Microstructure, Texture, and Mechanical Properties of Laminar Metal Composites Produced by Accumulative Roll Bonding

“…Hence, in recent years, various LMCs with mainly two or three different metal foil or sheet components have been produced using the principle of repeated stacking and roll‐bonding (in the following, those processes will be referred to “ARB”), often supplemented by annealing and rolling steps. Naturally, a high percentage of the scientific attention regarding LMCs is bestowed on Al alloys, for example, whose assets are excellent formability and corrosion resistance while being low in both weight and price.…”

“…Al alloys are frequently combined in order to improve specific properties, for example, A strong but corrosion susceptible Al alloy of series 2xxx, for example, benefits from the combination with a less strong but corrosion resistant alloy of series 6xxx . Likewise, in LMCs of series 5xxx and 6xxx, both surface quality and weldability are improved due to the reduction of the PLC‐effect and hot cracking, respectively.…”