About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
A High Throughput Additive Manufacturing and Characterization Approach for Evaluating Structure-property Relationships in Multiphase High Entropy Alloys |
Author(s) |
Jonathan W. Pegues, Michael A. Melia, Raymond V. Puckett, Shaun R. Whetten, Nicolas Argibay, Andrew B. Kustas |
On-Site Speaker (Planned) |
Jonathan W. Pegues |
Abstract Scope |
High entropy alloys (HEA) exhibit unique physical/mechanical properties that often exceed those of conventional materials. Navigating the phase/property space presents significant challenges, particularly for conventional fabrication and characterization methods. Thus, a new approach is required to rapidly evaluate the phase-property space over large composition ranges. Powder based directed energy deposition provides an opportunity to synthesize a broad range of compositions in a single metallurgical sample via in situ alloying. This screening approach is utilized to investigate the phase-property space afforded by compositionally grading a transition metal-based HEA with several refractory metals. A high throughput microstructural-mechanical analysis method was also utilized to rapidly assess the associated phases-strength characteristics as a function of local composition. Compositions promoting solid solutions, multiple phases, intermetallics, high hardness, and brittleness were identified and discussed in the context of alloy-specific microstructural characteristics and configurational entropy.
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Proceedings Inclusion? |
Definite: Post-meeting proceedings |