Abstract
A novel β-stabilized Ti-43Al-9V-0.2Y alloy sheet with a nano-scaled antiphase domain (APD) microstructure and excellent performance was fabricated via hot-pack rolling in the (α + γ) phase region (1260 °C). Owing to the temperature drop and reheat associated with multi-pass rolling, heterogeneous and regular APD-mixed lamellar structures formed with the occurrence of α → β + γ and α → α2 + γ phase transformations. The antiphase boundary (APB) between two nano-scaled APD structures (average size: ∼15 nm) is identified as a type of atomic shift, which is induced by the disorder-order transformation in the α2 phase. Moreover, compared with the corresponding as-forged alloy and other hot-working β-stabilized TiAl alloys, the current alloy sheet exhibited higher strength both at room and elevated temperatures. The improvement in the tensile properties is attributed mainly to the duplex microstructure consisting of fine nano-scaled APD/lamella mixed structures.
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.
