Relationship between Porosity and Failure Mode of Porous Aluminum Core Sandwich Structure

Abstract

It is promised that a sandwich structure consisting of an aluminum foam core and dense metallic face sheets is used as a structural component. In this study, an ADC12 porous aluminum core sandwich structure (AFS) with two A1050 aluminum face sheets was fabricated using the two types of friction stir welding route precursor foaming methods. Moreover, 3-point bending tests of the fabricated porous aluminum core sandwich structure were carried out. Also, X-ray computed tomography observation was carried out to examine the deformation states of the pores. Through the test and observation results, it was shown that the tensile type failure was occurred in the AFS with low porosity and the shear type failure was occurred in the AFS with high porosity.