The effect of second phase particles on the ductile fracture of metals and alloys

The effect of second phase particles on the ductile fracture of metals and alloys


S. Nugent
Dept. Materials Engineering.

Synopsis:


Silicon in the form of large brittle inclusions in an aluminium matrix has been found to crack at very low plastic strains. These cracks become cavities at higher strains and act as nuclei for the formation of voids just before fracture. Hence, silicon inclusions a surrounding matrix have been studied as a function of plastic strain, and various observations made. It is suggested on the basis of these observations that crack formation is largely a result of plastic flow in the matrix.