|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Understanding the Influence of Powder Bed Fusion Processing on the Shape Memory Alloy, Uranium-6 wt. Pct. Niobium
||Amanda Wu, Donald W. Brown, Bjorn Clausen, John W. Elmer
|On-Site Speaker (Planned)
Uranium-niobium alloys require specific melting and forging processes to achieve reasonable homogeneity of the alloying elements. The challenges and expenses associated with these materials processes, coupled with reprocessing of scrap from subtractive machining, have driven investigations into alternative manufacturing methods capable of producing geometrically complex parts from this uncommon material. Laser powder bed fusion can produce net-shape, fine-featured, complex architectures with high material efficiency. Materials specific challenges toward process qualification include the potential introduction of non-metallic impurities (through powder passivation or from the shielding gas atmosphere, e.g.), residual stresses resulting from thermal cycling under constraint, and process-specific weld microstructures; all of which impact on material performance. Here, we discuss the effect of post-processing heat treatments on material homogenization, impurity distribution, microstructural evolution and resultant mechanical performance, emphasizing the effects of thermal processing on structural behavior during compression loading and heating experiments via in situ neutron diffraction.
||Planned: Supplemental Proceedings volume