Mohammad Mahdi Baloochian - Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad, Mashhad, Iran
Jalil Vahdati Khaki - Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad, Mashhad, Iran
Seyyed Abdolkarim Sajadi - Department of Materials Science and Metallurgical Engineering, Engineering Faculty, Ferdowsi University of Mashhad, Mashhad, Iran

Metal- foam filled tubes as a set of thin walled sandwich structures have unique properties in which the impact energy absorption is the most important among them. It is proved that the shear strength of core-shell interface plays a decisive role on increasing the amount of energy absorbed in these kinds of structures. In this research the Al foam was fabricated using sintering-dissolution process (SDP) in situ in the tube. At the same time, a composite layer was synthesized with the aim of exothermic reaction of the formation of aluminum- Nickel intermetallic compounds during the sintering process. Furthermore, The X-Ray Diffraction and Electron Dispersive Spectroscopy(EDS) Analysis both proved the formation of diverse Nickel Aluminide's, when the optical and scanning electron microscopy evaluations exhibited a good continuity and metallurgical bonding of the core-shell interface and the structure of a Nickel Aluminide's composite which was fabricated in situ. Eventually, Microhardeness examination showed an improvement of interfacial strength in the final product

Aluminium- foam filled tubes – interfacial strengthening – Nickel Aluminides - Nanostructure Intermetallic-Metal Matrix Composite (IMC)