| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing for Energy Applications III
|
| Presentation Title |
Novel Aspects of multi-Wire Arc Additive Manufacturing for Large Component Fabrication for Extreme Environments and New Alloy Discovery |
| Author(s) |
Thomas M. Lillo, Nathan J. Huft, Denis E. Clark, Michael V. Glazoff, Joel A. Simpson |
| On-Site Speaker (Planned) |
Thomas M. Lillo |
| Abstract Scope |
Additive manufacturing using fusion arc welding, specifically, gas metal arc welding (GMAW) or gas tungsten arc welding (GTAW), is commonly referred to as wire arc additive manufacturing (WAAM). In this process, a single welding filler wire is used to build near-net shaped structures and components. Distinct advantages can be obtained if additional filler wires of different composition are added to the WAAM process, producing multi-wire arc additive manufacturing (m-WAAM). Controlled, relative feed rates of the different wires allow compositionally-graded deposits. Use of this capability in component fabrication for harsh environments as well as alloy discovery – including discovery of high entropy alloys – will be discussed. Preliminary results also will be presented relating to thermodynamic modeling of equilibrium phases, calculation of the composition-dependent coefficient of thermal expansion, microstructural characterization, mechanical property characterization (including the influence of build strategy on residual stress/distortion and creep behavior) and limitations of the m-WAAM process. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |