Mechanical properties of the aluminum roll-bond laminate AA5005–AA5083–AA5005

Aluminum alloys have long been recognized for their good combination of strength and light weight and have therefore been used for many industrial applications. However, in some alloys inhomogeneous deformations such as Piobert Lüder’s plateau and Portevin-Le-Chatelier bands result in unaesthetic markings on the sample surface. We present here an analysis of a roll bonded aluminum laminate made of an AA5083 core cladded with AA5005. Various microstructures were obtained via heat treatments and the effect of the cladding on the Piobert Lüder’s plateau and on the Portevin-Le-Chatelier band propagation was investigated. Impact tests were performed on the base materials (AA5005 and AA5083) and on the laminate, the latter showing significant improvements over the base materials.

► In this study, the mechanical properties of an aluminum laminate were obtained. ► Various microstructures were obtained in the laminate via heat treatment. ► Laminate structure decreases the Lüder’s plateau length and PLC serrations. ► The laminate structure has better impact resistance compared to base materials. ► A simple rule of mixture is able to predict some of the properties of the laminate.