Processing and dynamic testing of Al/W granular composites

Abstract

High density Al-W granular/porous composites were fabricated using Cold Isostatic Pressing (CIPing) and CIPing with subsequent Hot Isostatic Pressing (HIPing) with vacuum encapsulation. All samples had an identical weight ratio of Al and W components but different porosities due to different processing procedures. Their quasistatic and dynamic strength and fracture behavior were investigated at strain rate about 10 -3 1/s and 300 1/s, respectively. Sizes of W and Al particles, bonding between Al particles and morphology of W inclusions had a strong effect on dynamic strength and shear instability of the investigated granular composites. © 2012 American Institute of Physics.