About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys III: Mechanical Behavior
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Presentation Title |
The Impact of Compositional Variations on Microstructure and Nanomechanical Properties of Additively Manufactured AlCuFeNiTi High Entropy Alloy |
Author(s) |
Sandeep Khadka, Hubert K. Bilan, Tao Ma, Philip A. Yuya |
On-Site Speaker (Planned) |
Sandeep Khadka |
Abstract Scope |
An equiatomic AlCuFeNiTi high entropy alloy (HEA) was successfully fabricated for the first time using the directed energy deposition method. The alloy's microstructure and nanoscale mechanical properties were characterized using microscopy techniques and nanoindentation to provide insight into the relationship between its microstructural and nanoscale mechanical properties. The microstructure mainly comprises a dendritic region with an ordered Heusler structure and an interdendritic region with FCC structure, which also shows traces of the C14 Laves region. Dendritic fragmentation occurs during solidification, resulting in the alloy mainly having equiaxed grains distribution. Nanoindentation revealed that the interdendritic regions present a soft zone, while the Laves phase presents the hardest region. The presence of laves phase within the grain boundaries also strengthens the region. This study demonstrates the synthesis of an equiaxed HEA with a high combination of elastic modulus and hardness values determined using nanoindentation. |
Proceedings Inclusion? |
Planned: |