The Stress and Strain-Rate Dependence of Spall Strength in Two Aluminum Alloys

Abstract

The spallation behavior of 6061-T6 and AMg-6 aluminum alloys was studied as a function of loading stress and initial pulse duration for stress amplitudes ranging from 5-20 GPa and for pulse durations spanning the range of 0.06-0.9 p.s. These experiments show that the spallation strength varies from about 0.7-1.4 GPa for strain rates varying from 0.15-1 p.s-I and for impact stresses from 5-20 GPa.