About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Refractory Metallic Materials
|
Presentation Title |
Use of Materials Modeling and Direct Energy Deposition for Design of Additively Manufacturable Tantalum Alloys |
Author(s) |
Colleen Hilla, Paul Korinko, Tatiana Ayers, Guru Dinda, Laura Tovo |
On-Site Speaker (Planned) |
Colleen Hilla |
Abstract Scope |
Refractory alloys have a variety of benefits for harsh environments, including high melting point, high temperature strength, chemical inertness, and high hardness. Ta is one such refractory material whose leading benefit over other refractory materials is processability, including weldability. However, Ta also has a variety of drawbacks including mechanical behavior and cost. Through this work, W, Mo, Nb, Ti, and Cr alloying additions have been investigated to improve strength and decreased material cost. A Calphad modeling approach was used to narrow the composition range for each binary and ternary alloy combination. Incremental composition changes were utilized for each block in the build, printed by direct energy deposition (DED). Sample defects, such as porosity and cracks, were analyzed through optical and scanning electron microscopy and Archimedes and bulk density was analyzed. For low defect alloys, mechanical behavior was tested including tensile strength and hardness. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, High-Temperature Materials, Other |