Mechanical Behavior of Alpha Titanium Alloys at High Strain Rates, Elevated Temperature, and under Stress Triaxiality

The paper presents the experimental results of mechanical behavior Ti-5Al-2.5Sn alloy at high strain rates and elevated temperature. Flat smooth notched specimens with notch radii 10 mm, 5 2.5 mm were used. studies carried out using high-velocity servo hydraulic test machine Instron VHS 40/50-20. samples heated flat ceramic infrared emitters on average between 60 s 160 s. temperature control in working part was real time a chromel-alumel thermocouple. digital image correlation (DIC) method employed to investigate evolution local fields gauge section specimen. Data influence stress triaxiality ductility obtained under tension ranging from 0.1 103 s?1 673 K. It found that, K, increases increasing rate for both specimens.