|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
||Fracture Behavior of Laser Powder Bed Fusion Fabricated Ti41Nb via In-situ Alloying
||Sheng Huang, Punit Kumar, R. Lakshmi Narayan, Wai Yee Yeong, Upadrasta Ramamurty
|On-Site Speaker (Planned)
The investigation of the fracture behavior of Laser Powder Bed Fusion (LPBF) fabricated biocompatible β-Ti alloys is essential to enable their adoption as the next-generation biomedical implant materials. In our study, the fatigue crack growth (FCG) behavior and fracture toughness of in-situ alloyed Ti41Nb (wt.%) were explored. The inherently fast cooling rate of LPBF limited the melting and diffusion of Nb despite the utilization of optimized parameter, consequently led to the formation of layered mesostructure with alternated Nb deprived region and matrix region with close-to-nominal composition. Crack interactions with the mesostructure control the anisotropy in FCG and fracture toughness. The role of in-situ alloying in inducing toughening mechanism through mesostructure modifications and the future direction of in-situ alloyed β-Ti will be discussed in detail during the presentation.
||Additive Manufacturing, Titanium, Biomaterials