Hypervelocity Impact Response of Al-Sc and Al-Ti Targets

Al-Sc and Al-Ti semi-infinite targets were impacted by stainless steel projectiles with velocity range of 0.6–1.9 km/s. It was found that the Al-Sc targets demonstrated a much better ability to resist hypervelocity impact. It is concluded that different microstructures of Al-Sc and Al-Ti alloys, including different grain sizes and secondary particles precipitated in the matrix, result in their greatly different abilities to resist impact.