چكيده به لاتين
Paying attention to the advances made in various industries today, the use of two and multilayer metal sheets has been widely used to achieve advantages such as higher strength to weight ratio, improved formability increased corrosion resistance and so on. Considering the use of aluminum/magnesium laminates as an alternative to steel in the automotive industry, to reduce weight and increase fuel efficiency, much research is being done on forming and studying the mechanical properties of these composite metal sheets. In this study, the mechanical properties and formability of aluminum/magnesium two-layer sheets made by explosive welding and the effect of annealing and rolling processes on these parameters are investigated. For this purpose, first, the theoretical and experimental bases of research in different articles are discussed. The aluminum/magnesium two-layer sheet was then fabricated by explosive welding and Annealing was performed on two-layer sheets at two temperatures of 250 and 350 ° C and rolling with two reduction rates of 11 and 21%. After fabricating the specimens, experimental work has been done to determine the forming limit diagram and mechanical properties, including Nakazima experiments, uniaxial tensile test, micro hardness test, and so on. In this study, for the first time, the forming limit diagram of aluminum/magnesium two-layer sheets formed by explosive welding is experimentally obtained. After annealing the two-layer sheets, the formability improved significantly and after the rolling process, the formability of the two-layer sheets decreased. With heat treatment, the strength of the two-layer plate decreased and the elongation percentage increased. Also with rolling, the strength increased and the percentage of elongation decreased.
