Pure Al-based foam materials were fabricated by melt direct foaming.Solidification characteristics of foam!materials were described in the condition of air cooling and forced water cooling.The results reveal that the solidification of pure Al-based foam materials was characterized by laminated solidification at outer foam and by volumetric somidification at inner foam

which leads to the formation of crack in center axial of aluminum foam

in case of air cooling

while it was characterized by laminated solidification under forced water cooling condition

so the absence of crack can be observed due to the uniform distribution of porosity in the foam.Based on an established solidification model for pure Al-based foam

it is found that solidification contraction can be uniformly distributed throughout the cell walls during laminated solidification

eliminating the crack formed from partial solidification of cell walls and homogenizing the distribution of porosity in the foam.