Origins of variability in the fracture-related mechanical properties of a tilt-pour-permanent-mold cast Al-alloy

Variability in the ductility and strength of a tilt-pour-permanent-mold cast Al-alloy is examined. The variability exhibits strong correlation with the amount of oxide films and shrinkage pores in the corresponding fracture surfaces. The variability can be decreased through a reduction in the amount of these defects via better process control.