|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Materials and Fuels for the Current and Advanced Nuclear Reactors V
||Additive Manufacturing of Uranium-6 Wt. Pct. Niobium
||Amanda Wu, Gilbert F. Gallegos, Matthew W. Wraith, Stephen C. Burke, Donald W Brown
|On-Site Speaker (Planned)
Uranium-niobium alloys require specific melting and forging processes to achieve reasonable homogeneity of the alloying elements and to overcome shape memory effects and complex phase transformations, respectively. The challenges and expenses associated with these materials processes have driven our exploration of alternative manufacturing methods capable of producing geometrically complex parts while minimizing processing time and waste of this limited material.
Powder bed fusion additive manufacturing introduces significant processing and materials challenges toward achieving structural integrity. Broadly addressed aspects affecting powder bed fusion structures include surface roughness, residual stresses, and porosity. Here, we focus on materials-specific challenges—namely, the influence of multiple pass reheating during processing and post-processing homogenization on phase transformations and the role of impurities and oxides on grain morphology and mechanical behavior—with a view of adopting powder bed fusion processing for the shape memory alloy, uranium-6 wt% niobium.
||Planned: A print-only volume