Strength characteristics, deformation and failure mechanisms of Ti-6Al-3Mo alloy in shock waves

This paper presents the results of shock compression wave profiles of $(\alpha + \beta)$-titanium-based alloy Ti-6Al-3Mo samples under various loading conditions, and also the results of their metallographic analysis. The dependency of spallation strength on strain rate in rarefaction wave was obtained as well as the dependency of Hugoniot elastic limit on propagation time in the material. Also, spallation strengths and Hugoniot elastic limits in the temperature range from 168 to 400 В$^\circ$C were determined. The results of the metallographic analysis of the recovered samples show that under the implemented loading conditions high-rate plastic deformation occurs by sliding, and twinning does not take place. High-rate plastic deformation of the studied alloy is characterized by strain localization banding. Mechanical deformation of the alloy involves the formation of spall and shear cracks.