Effect of Cell Wall Ductility and Toughness on Compressive Response and Strain Rate Sensitivity of Aluminium Foam

摘要: The study presents the effect of cell wall ductility and toughness on compressive behaviour closed-cell Al foams under static dynamic loading localised deformation by indentation. Two kinds alloys including relatively ductile AlSiMg alloy high-strength AlZnMg alloy, which comprises a great amount brittle eutectic domains, were used as matrix materials. Both fabricated via newly developed melt processing using CaCO3-foaming agent without Ca additive. Mechanical quasi-static compression indentation was examined compared with that performed direct impact tests. Characteristic events revealed in patterns at also monitored CCD camera. Significant differences stress-strain response strain rate sensitivity arose from difference microstructure, hence, material investigated discussed.