About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Advances in Multi-Principal Element Alloys II
|
Presentation Title |
J-68: Processing-Structure Relationship in Additive Friction Stir Deposited AlxCoCrFeNi Complex Concentrated Alloys |
Author(s) |
Michael P. Amling, Malcolm Brady Williams, Paul Allison, Mark Weaver |
On-Site Speaker (Planned) |
Michael P. Amling |
Abstract Scope |
This study investigates the process-structure relationship for bulk Al0.04CoCrFeNi and Al0.2CoCrFeNi complex concentrated alloys (CCAs) produced via additive friction stir deposition (AFSD). Bulk deposits were produced using the AFSD machine from cast HEA feedstock. The presence of equilibrium and nonequilibrium phases after deposition were determined via x-ray diffraction. Energy dispersive x-ray spectroscopy and electron backscatter diffraction were utilized to quantify elemental segregation, grain size and grain/phase morphology after deposition. The feedstock grain size was significantly reduced during processing due to dynamic recrystallization. The Al0.2CoCrFeNi CCA exhibited a substructure different than cast due to the AFSD process. This substructure was analyzed using both transmission electron microscopy and atom probe topography to determine the elemental segregation seen between the phases and to view precipitate evolution during processing. The microstructures are discussed relative to cast materials with the same or similar compositions. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Entropy Alloys, Characterization |