Layered alloys and composite materials have become an increasingly popular in industrial development. The ROLL BONDING (RB) process, as a solid phase method of BONDING, has been widely used in manufacturing large layered strips. In this study, aluminum alloy (AA 5083) strips were ROLL bonded at warm and cold temperatures. The effects of the ROLLing parameters such as the amount of plastic deformation by ROLLing and ROLLing temperature that create successful bonds on the bond strength and the threshold deformation between two layer strips of AA 5083/ AA 5083 were investigated. The bond strength was evaluated by the peeling test. It was found that by increasing the ROLLing temperature or thickness reduction, the peel strengths of the bonds increased and successful bonds with higher strength were created. Also, the threshold thickness reduction decreased with increasing the ROLLing temperature. Moreover, the interfaces of laminates were studied by scanning electron microscopy (SEM) in order to investigate the BONDING quality.

An Al/Stainless Steel/Al lamellar composite was produced by ROLL BONDING of the starting sheets at 400 °C. Afterward, the ROLL bonded sheet was cut in half and the accumulative ROLL BONDING (ARB) process at room temperature was applied seven times. As a result, the central steel layer fractured and distributed in the Al matrix among different layers introduced by the repetition of ROLL BONDING process. The tensile results showed that the ROLL bonded sheet has much higher strength and strength to weight ratio compared with the initial aluminum sheet as a result of the presence of continuous steel core. However, poor ductility properties were observed during tensile test, which were ascribed to the increasing deformation resistance and localized thinning of the central stainless steel sheet during the ROLL BONDING process. The ARBed sample exhibited lower strength compared with the ROLL bonded sheet due to the breakup of stainless steel layer into many small segments. Anyway, an ultrafine grained microstructure with average grain size of 400 nm in the aluminum matrix and 71% strain-induced martensite in the steel segments were detected by the electron backscattered diffraction (EBSD) technique, which were found to be responsible for the enhancement of mechanical properties compared with the initial aluminum sheet.

The strength of aluminum Al5083 laminated composite in accumulative ROLL BONDING (ARB) is increased using Al2O3 nanoparticles. For this purpose, the ARB process was conducted at room temperature without lubricants in four consecutive passes. A thickness reduction of 50% in each pass was considered with no heat treatment between sequential passes. In each pass, Al2O3 nanoparticles were placed between the layers. Finally, the produced metal composite was evaluated for microstructural and mechanical properties using optical microscopy, and uniaxial tensile, microhardness, and peeling tests according to the relevant standards. The primary objective of this research was to enhance the tensile strength of the composite after work hardening by incorporating nanoparticles and annealing in the final cycle. The results showed that with an increase in accumulative ROLL BONDING cycles, tensile strength and hardness increased, and this increase occurred more prominently in the initial cycles. Furthermore, the amount of elongation decreased at the end of the first pass and then increased until the end of the fourth pass. These changes in mechanical properties during the ARB process are due to the dominant mechanisms of work hardening and strain hardening in the initial cycles and the improvement in microstructure and refinement of grains in the final cycles of this process. The highest tensile strength and microhardness, which increased by 48.1% and 55.9%, respectively, compared to the initial sample were measured at the end of the fourth cycle. Additionally, comparing the heat-treated sample with Al2O3 nanoparticles to the base metal showed a 34.9% increase in strength and a 30.8% decrease in elongation.

This article describes a study of the application of a ROLL BONDING technique to MS90(CuZn10) alloy strips and steel sheets using a chromized interlayer. It was found that the overall bond between these two metals resulted from two different types of bonds: a block bond, linking the MS90 alloy strips and chromium topcoat layer, and a blank bond, linking the MS90 alloy strips and bare steel surface in the area where the chromium coating has been fragmented. This study investigated the effects of plating time on the thickness of the coating layers and of the area fraction of the blank bond on the bond strength. The overall bond strength depends mainly on the strength and the area fraction of the blank bond. A linear relationship model exists between the overall bond strength and the area fraction of the blank bond. The bond strength of the blank bond was eight times greater than that of the block bond. The area fraction of the blank bond increased with increasing the coating thickness up to 55 µm, but thereafter decreased due to the rotation of the chromium blocks.

A commercial Al-Mg-Si alloy (AA 6061) was deformed by using the accumulative ROLL BONDING (ARB) process for up to five cycles at ambient temperature. The evolution of texture in this process was studied by the X-ray diffraction (XRD) method. Experimental results indicate that the combination of the shear texture composed of Rotated cube {001}<110> component and the ROLLing textures that included Copper {112}<111> and Dillamore {4, 4, 11}<11, 11, 8> components developed after the first cycle. During the first cycle, the shear texture was developed as a result of shear deformation induced by high level of friction between the ROLLs and the sheet. By increasing the number of cycles, the shear texture strength diminished and changed to the ROLLing texture. After the fifth cycle, a remarkable increase in the ROLLing texture intensity was observed due to homogenous deformation induced by the presence of fine non-shearable particles. Additionally, the presence of magnesium in solid solution influenced the texture evolution during ARB.