Influence of hydrogen content on room temperature compressive properties of Ti-6Al-4V alloy at high strain rate

Abstract Electromagnetic forming tests were done at room temperature to reveal the influence of hydrogen content on the compressive properties of Ti–6Al–4V alloy at high strain rate. Microstructure was observed to reveal the mechanism of hydrogen-enhanced compressive properties. The experimental results indicate that hydrogen has favorable effects on the compressive properties of Ti–6Al–4V alloy at high strain rate. Compression of Ti–6Al–4V alloy first increases up to a maximum and then decreases with the increase of hydrogen content at the same discharge energy under EMF tests. The compression increases by 47.0% when 0.2% (mass fraction) hydrogen is introduced into Ti–6Al–4V alloy. The optimal hydrogen content for cold formation of Ti–6Al–4V alloy under EMF was determined. The reasons for the hydrogen-induced compressive properties were discussed.