Metal foams, or metallic porous materials, are a new class of materials which have lower densities compared with their dense metallic counterparts. Many applications of metal foams have been widely developed in industries because of their advantageous properties, such as lightweight, good energy absorption ability, higher stiffness, recyclability and so on. Now, the main applications are in three fields: Architecture, Automotive and Medical. In this thesis, the characteristics of Al-foams and the possibility to use them as cores in casting technologies are studied. For this last point, foams with different densities were inserted into the casting die and aluminum alloys were cast around the foam cores.