Abstract
In this study, porous aluminum core filled in hollow steel pipe composite materials (porous core pipe) was fabricated by applying friction welding. Al plates and blowing agent powder were put into the hollow steel pipe, and the rotating tool was pressed into the Al plates. Friction heat was generated and precursor of porous Al was fabricated by mixing Al plates and blowing agent powder by means of plastic flow. Porous core pipe with metal bonding was successfully fabricated by heating the precursor. The compression properties and deformation behavior of porous core pipe was obtained by the compression test. As a result, energy absorption per unit of volume of porous core pipe increased 1.5 times compare with the hollow pipe. But, the energy absorption per unit mass was slightly decreased.
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