Abstract
Aluminum foam is a multifunctional material with light weight and high energy absorption. In this study, three-layered functionally graded ADC12 aluminum alloy foam with different pore structures was fabricated by varying amounts of blowing agent added and amounts of gases in ADC12 aluminum alloy die castings as starting materials. From X-ray computed tomography (X-ray CT) observations of the pore structures of fabricated three-layered functionally graded porous ADC12 aluminum, it was found that it has three layers with layer A (high porosity and large pore diameter), layer B (middle porosity and small pore diameter) and layer C (low porosity and small pore diameter). The deformation of the fabricated three-layered functionally graded porous ADC12 aluminum during compression tests started from the low strength layer A, and thereafter the middle strength layer B and high strength layer C sequentially deformed.
