About this Abstract |
Meeting |
5th International Congress on 3D Materials Science (3DMS 2021)
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Symposium
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5th International Congress on 3D Materials Science (3DMS 2021)
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Presentation Title |
Microstructures and Properties of As-Cast Al<sub>2.7</sub>CrFeMnV, Al<sub>2.7</sub>CrFeTiV, and Al<sub>2.7</sub>CrMnTiV High Entropy Alloys |
Author(s) |
Keith E. Knipling, Patrick Callahan, Richard Michi, David Beaudry |
On-Site Speaker (Planned) |
Keith E. Knipling |
Abstract Scope |
High entropy alloys (HEAs) typically contain five or more principal elements in nearly equiatomic proportions, significantly expanding the composition space and achievable properties of novel metallic materials. Here we present the complex microstructures of as-cast Al<sub>2.7</sub>CrFeMnV, Al<sub>2.7</sub>CrFeTiV, and Al<sub>2.7</sub>CrMnTiV HEAs. All alloys are predominantly body-centered cubic (BCC). Al<sub>2.7</sub>CrFeMnV is single-phase BCC with lattice parameter (a) of 0.2968 nm. Al<sub>2.7</sub>CrFeTiV is multiphase, with a high volume fraction of Al-rich G-phase precipitates and Laves phases in a BCC matrix (a = 0.3006 nm). Al<sub>2.7</sub>CrMnTiV contains micron-scale AlTi (L1<sub>0</sub>) precipitates as well as coherent, nanoscale cuboid B2 precipitates in a BCC matrix (a = 0.3946 nm). In each of the alloys, atom-probe tomography is used to visualize the nanoscale microstructures in three dimensions and assess atomic-scale clustering and ordering. These experimental results are compared with the equilibrium phases predicted by thermodynamic modeling. |
Proceedings Inclusion? |
Definite: Other |