| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
High Entropy Alloys IX: Alloy Development and Properties
|
| Presentation Title |
Effect of Process Parameters on the Microstructure and Mechanical Properties of Wire+Arc Additively Manufactured AlCoCrFeNi High Entropy Alloy |
| Author(s) |
Rumman Ul Ahsan, Xuesong Fan, Gi-Jeong Seo, Peter K. Liaw, Duck Bong Kim |
| On-Site Speaker (Planned) |
Duck Bong Kim |
| Abstract Scope |
Gas tungsten arc (GTA) - Wire + arc additive manufacturing (WAAM) is characterized by the independent control of the arc and the consumable. This makes it suitable for additive manufacturing with any metallic materials, including the high entropy alloys (HEAs). In this work, the GTA-WAAM with a pre-alloyed and extruded AlCoCrFeNi HEA has been explored. Initially, single layers of HEA are deposited with a range of process parameters. Through in-situ process monitoring (current and voltage), high-dynamic-range imaging, bead cross-section measurement, and statistical analysis; energy density (> 80 W/mm3 is required) have been identified as the primary factor controlling the bead geometry and continuity. Using the same energy density, multi-layer thin-walled structures are deposited with two different heat inputs (310 and 930 J/mm). The microstructure, tensile strength, and failure locations have been investigated. GTA-WAAMed HEA has been found to exhibit comparable mechanical performance with casted- and hot-isostatic-pressed AlCoCrFeNi HEA. |
| Proceedings Inclusion? |
Planned: |