|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||A-3: Characterization of Ti-6Al-4V to 304L SS Gradient Components Fabricated with Laser Deposition
||Hayden Lawrence Horan, Ashley Reichardt, Theresa Mary Kelsy Green, Douglas Hofmann, Scott Roberts, Richard Otis, R. Peter Dilon, Andrew Shapiro-Scharlotta, Zi-Kui Liu, John Paul Borgonia, Peter Hosemann
|On-Site Speaker (Planned)
Recently, the fabrication of highly specialized gradient composition components has been enabled by laser deposition systems equipped with multiple powder supply hoppers. Guided by multicomponent phase diagrams, a path from one alloy to another is followed by varying the relative quantities of element or alloy powders to be melted layer by layer. Using this technique, several components transitioning from Ti-6Al-4V to 304L SS via elemental vanadium have been manufactured in an attempt to strategically avoid the formation of brittle intermetallic phases in the transitional region. Post-fabrication microstructural analysis of the components is performed with a combination of energy dispersive X-ray spectroscopy (EDS) and electron backscatter diffraction (EBSD), enabling mapping of grain size and structure, phase, and composition along the component gradient. Changes in mechanical properties along the transition are assessed with nanoindentation. The analysis results are then used to refine the process parameters and gradient paths for future builds.
||Planned: A print-only volume