Abstract
The effects of hydrogenation (≈0–0.9 wt.%) on the flow stress behavior and microstructural evolution of Ti40 (Ti–25V–15Cr–0.2Si) alloys during hot deformation are investigated. Isothermal hot compression tests are performed in the temperature range of 1023–1223 K with a strain rate of 0.01 s−1. The stress–strain curves of the Ti40-xH alloys are recorded and the relationship between steady-state stress and hydrogen content at different temperatures is determined. With an increase of hydrogen content, the steady-state flow stress initially increases, and then decreases before increasing again at higher hydrogen contents. This behavior implies that hydrogen exerts a strengthening effect at low and high concentrations and a softening effect at intermediate concentrations. The strengthening mechanism is explained in terms of solid solution strengthening of hydrogen, fine grain strengthening caused by hydrogen induced DRX (dynamic recrystallization) and precipitation strengthening of silicide. The softening mechanism is explained in terms of DRX, grain strength softening caused by grain growth and a continuous reticular precipitation of silicide.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
