Comparative failure of AA2024 and AA7175 at low and high strain rate
Résumé
This work compares the quasi static and dynamic failure of two types of aeronautical alloy, namely AA2024 and AA7175. Low strain rate tensile tests were carried out at a strain rate range close to 10-3 – 10-1 s-1 and high strain rate compression tests using a split Hopkinson pressure bar (SHPB) device at a strain rate range between 2000-4500 s-1. The formation of shear localization bands, possibly adiabatic shear bands (ASB), can be seen on AA7175 as pre-failure mechanism during high strain rate compression.