Abstract
The anisotropy of tensile properties and fracture toughness of Ti−6Al−4V (Ti64) alloy fabricated by β forging was investigated. In order to evaluate anisotropic mechanical properties, the microstructure and crystallographic texture of billets with different orientations were characterized, and the influence of sampling direction on tensile properties and fracture toughness was studied. The results reveal that the prior β grains of Ti64 billet display pan-cake-type characteristics. At room temperature, the alloy is mainly composed of α phase, and several α phase variants produced by β→α phase transformation decrease the α texture intensity. The anisotropy of mechanical properties is affected by prior β grain morphology and the slip activation related to α texture. The initiation toughness was obtained by the J-integral resistance curve method. The initiation toughness was divided into intrinsic and extrinsic toughness by calculation. The anisotropy of intrinsic toughness is mainly attributed to the size of crack tip plastic zone, which is affected by prior β grain morphology. In contrast, the extrinsic toughness is affected by zigzag degree of crack, which is mainly influenced by α lamellae and colonies.
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 callMore From: Transactions of Nonferrous Metals Society of China
Disclaimer: 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.
