About this Abstract |
| Meeting |
2025 AWS Professional Program
|
| Symposium
|
2025 AWS Professional Program
|
| Presentation Title |
Exploring Gas Metal Arc Directed Energy Deposition of Ultra High Strength Steel Feedstocks |
| Author(s) |
Teresa Valenzuela, Caelan Kennedy, Krista Limmer, Daniel Field, Katie Sebeck, Jonah Klemm-Toole |
| On-Site Speaker (Planned) |
Teresa Valenzuela |
| Abstract Scope |
Ultra high strength steels (UHSS) are used in a variety of applications including pressure vessels, construction equipment, shipbuilding, and protection applications. Gas metal arc welding (GMAW) and the associated additive manufacturing process, gas metal arc directed energy deposition (GMA-DED), are ideal for new or replacement component manufacturing and repair due to high deposition rates. However, there is very little data in the literature regarding the microstructure, strength, and toughness of UHSS feedstocks greater than 120 ksi ultimate tensile strength (UTS). This work aims to explore the microstructure and mechanical performance of wire feedstocks in the 120 – 140 ksi UTS range processed with GMA-DED. A collaborative robot controlled Fronius TPS400i utilizing the cold metal transfer (CMT) deposition mode was used to produce wall builds. Tensile and Charpy V-notch samples were extracted from the bottom middle and top of the walls in the as-built condition. The microstructure and hardness were characterized along the build direction to determine any differences resulting from varying thermal histories. The variation in strength and toughness in the GMA-DED builds are compared to reported values for the feedstock manufacturers and analyzed with respect to the microstructure in the builds. Results of this work demonstrate the UHSS feedstocks can be processed with GMA-DED to produce components with desirable combinations of high strength and toughness. |
| Proceedings Inclusion? |
Undecided |