Superelastic response of low-modulus porous beta-type Ti-35Nb-2Ta-3Zr alloy fabricated by laser powder bed fusion
Abstract
This work investigated the superelastic response of the low-modulus porous β type Ti-35Nb-2Ta-3Zr scaffolds with different pore dimensions fabricated by laser powder bed fusion. The superelastic behavior was enhanced with increasing the pore size and stress-induced phase transformation, which correspondingly led to stress-induced α" [110]-type I twin martensitic transformation and ω formation adjacent to β matrix/twins. The resultant interstitial compound phase structure facilitated the β → α" and β → ω transition, which was triggered by interfacial stress/strain concentration and high-density dislocations. Substantial high-angle grain boundaries (HAGBs) accumulated high-intensity Schimd factor and crystallographic texture after being deformed. Moreover, a lower Young’s modulus was obtained when the pore size and stress increased.
Document Type
Journal Article
Date of Publication
1-1-2020
Publication Title
Additive Manufacturing
Publisher
Elsevier
School
School of Engineering
RAS ID
31553
Copyright
subscription content
Comments
Hafeez, N., Liu, J., Wang, L., Wei, D., Tang, Y., Lu, W., & Zhang, L. C. (2020). Superelastic response of low-modulus porous beta-type Ti-35Nb-2Ta-3Zr alloy fabricated by laser powder bed fusion. Additive Manufacturing, 34, Article 101264.
https://doi.org/10.1016/j.addma.2020.101264