Roll-bonding Technique Research Articles

Roll-bonding of a Laminate Aluminum Alloy/Ni, Al-Type Alloy Composite

A laminated composite of 3003 Al/Ni 3 Al-type alloy was fabricated by the roll-bonding technique at around 250 o C. The characterization of the composite including interface was carried out using optical and scanning electron microscopy, a quantitative X-ray energy dispersive spectroscopy (EDS) and Vickers microhardness. Also, Vickers indentation was used to induce interface debonding, and the debonding length was related to the interface bonding strength. It was found that the dynamic recovery/recrystallization of Al had taken place above 60% reduction of 3003 Al layer. Large reductions (deformation) in fabricating the composite are not beneficial for increasing the interface bonding strength

Evaluation of formable light metal-alloy steel composites

Al-steel and Ti-steel and rod composites were fabricated by hot-pressing or roll-bonding techniques in line with previously developed formability criteria for the production of formable metal-metal composites. The composite materials produced were in the form of roll-bonded laminates, hot-pressed sheet and roll-bonded rod composites. Each of these composite systems was evaluated with respect to the optimum fabrication process developed, the bond strength produced between the matrix and reinforcement, and the resultant mechanical properties. Precipitation-hardened aluminium alloy reinforced with either stainless steel or maraging steel and Ti 318 alloy reinforced with an ausforming (hot-cold worked) steel produced promising composite materials. Both these materials provided a range of mechanical properties which could compete with the high strength light metals.