Adiabatic Shear Banding and Fracture in Ti-6Al-4V during Forced Shear Test

Mircrostrutural evolution of ASB and fracture mode during forced shear test in Ti-6Al-4V alloys has been investigated under OM、SEM、TEM.Tests were performed by using SHPB and hat sample, with strike bars 150 mm and 200 mm and the velocity of strike bar 28 m/s.The results showed that ASBs in Ti-6 Al-4 V alloys are “white bands”, the width of ASB is 9.2 μm under 150 mm strike bar, and 10.8 μm under 200 mm strike bar;the cracks in the center of ASB are caused by the breaking of amorphous, the cracks in the edge of ASB are caused by the imcompatible deformation between matrix and ASB.