Metal Foams: A Design Guide

(a)
(b)
(c)
Properties of metal foams 41
Figure 4.1 (a) A Cymat foam of relative density / s D 0.04 (density
108 kg/m 3 or 6.7 lb ft 3 ). (b) An Alporas foam of relative density / s D 0.09
(density 240 kg/m 3 or 15 lb ft 3 ). (c) An Alulight foam of relative density
/ s D 0.25 (density 435 kg/m 3 or 270 lb ft 3 )
0.09. The Alulight foam (Al–TiH) in Figure 4.4(c) has a relative density of
0.25, which lies at the upper end of the range in which this material is made
⊲0.1 < / s < 0.35⊳.
The properties of metal foams depend most directly on those of the material
from which they are made and on their relative density; but they are influenced