|About this Abstract
||2021 TMS Annual Meeting & Exhibition
||Additive Manufacturing Fatigue and Fracture V: Processing-Structure-Property Investigations and Application to Qualification
||Laser Powder Bed Fusion of TiTa Alloys: Process Optimisation and Fatigue Properties
||Andrey Molotnikov, Erin Brodie, Thomas Niendorf
|On-Site Speaker (Planned)
Additive manufacture is emerging as a viable manufacturing method for fabrication of a new type of β-titanium alloys such as TiTa. However, the addition of refractory element Ta possess some processing challenges due to its very high melting point. In this work, fabrication of multiple TiTa alloys using laser powder bed fusion (L-PBF) is reported. The optimisation of processing parameters to produce fully dense samples with a minimised volume fraction of unmelted Ta particles is discussed focusing on different processing strategies. The produced material and lattice structures were assessed for mechanical properties under static and cyclic loading. TiTa alloy showed similar strength to L-PBF titanium with half the elastic modulus and an altered microstructure caused by the ‘remelt’ scanning strategy. The alloy demonstrated a superior yield stress normalised fatigue performance compared with commercially pure Ti, and Ti-6Al-4V. The morphology of the resulting microstructures was analysed by SEM and XRD analysis.