关键词: 闭孔泡沫铝材料, 轧制, 道次压下量, 脆性断裂, 吸能性

Abstract: The rolling process of closed-cell aluminum foam that was prepared by melt-foaming process was studied, as well as its deformation and failure behavior due to different pass reduction. Then, the main influencing factors on the roll ability of aluminum foam was discussed. The results showed that in the rolling process of closed-cell aluminum foam the basic principle is multiple pass with small deformation, e g., when the pass reduction is 0.1 mm, the 11 mm-thick aluminum foam in which the Si content is 12wt% can be deformed by 1 mm finally. When the pass reduction is too big, the failure of aluminum foam is typically in form of brittle fracture. The pass reduction taken should be proper for the excellent energy-absorbing characteristic of aluminum foam, but the very small deformation will be easy to lead the rolled piece to be bent then shear failure finally. The way to improve the roll ability of aluminum foam is to decrease its Si content and ensure the homogeneity of its microstructure and mechanical properties and especially adopt proper pass reduction with low rolling speed.