The compressive properties of closed-cell Zn-22Al foams

Abstract The closed-cell Zn-22Al (ZA22) foams were fabricated by the melt foaming process using CaCO 3 blowing agent. The compressive properties of ZA22 foams were investigated under quasi-static condition. The results show that the compressive stress–strain curves of ZA22 foams exhibit three distinct deformation regions: a linear elastic region where the stress rises linearly with increasing strain; a plastic plateau region with slight stress fluctuation over a wide range of the strain; and a densification region where the stress increases rapidly. The plastic collapse stress of ZA22 foams rises with increasing relative density. The relationship between relative plastic collapse stress and relative density is in accordance with Gibson and Ashby model.