Abstract
Ti-6Al-4V alloy commonly suffers from low strain hardening capability and limited ductility. The present study proposes a novel pathway for improving its work hardening capacity via simple solution in the virgin lower α + β regime. Systematical investigations on microstructures and mechanical properties were conducted to unveil the underlying mechanism. Elemental partitioning occurs between α and β phases and β-stabilizers are progressively depleted from β phases as solution temperature rises. Metastable β phases (βm) can be created in the range of 550 ∼ 700 °C and transform into α′′ martensite during mechanical straining. The unusual stress-induced βm → α′′ martensite transformation (SIMT) in Ti-6Al-4V alloy induces three-staged strain hardening and triggers the highly desired transformation-induced plasticity (TRIP) effect. Such merit endows this alloy with an extremely high strain hardening rate of ∼6.5 GPa and ensures good combinations of strength and ductility.
Published Version
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.
