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 |
Exploring the Structure-property Relationships of (Ti, TiAl<sub>6</sub>V<sub>4</sub>)<sub>x</sub>CoCrFeMnNi Graded High Entropy Alloy |
Author(s) |
Jonathan W. Pegues, Michael Melia, Mark Rodriguez, Raymond Puckett, Shaun Whetten, Nicolas Argibay, Andrew Kustas |
On-Site Speaker (Planned) |
Jonathan W. Pegues |
Abstract Scope |
High entropy alloys are a promising group of materials with seemingly limitless and unexplored composition spaces capable of producing physical/mechanical properties that exceed those of conventional materials. Utilizing an additive manufacturing enabled high throughput materials discovery framework, titanium graded high entropy alloys are screened to establish first order structure-property relationships. Compact metallurgical (Ti, TiAl<sub>6</sub>V<sub>4</sub>)<sub>x</sub>CoCrFeMnNi specimens spanning x = 0 – 100% at. fractions were fabricated using in-situ alloying enabled by powder based directed energy deposition. Microstructure evolution as a function of specific (Ti, TiAl<sub>6</sub>V<sub>4</sub>)<sub>x</sub>CoCrFeMnNi compositions were identified through a combination of XRD/XRF and SEM-EDS/EBSD. Microhardness measurements were also performed to rapidly establish baseline structure-property relationships. Functional composition maps identifying compositions that promote solid solutions, multiple phases, intermetallics, high hardness, and brittleness are discussed in relation to the alloy-specific microstructural characteristics and configurational entropy.
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Proceedings Inclusion? |
Definite: Post-meeting proceedings |