| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Marine Materials and Structures
|
| Presentation Title |
Nano-indentation Tomography of Wire-Arc Additive Manufactured Nickel Aluminum Bronze Alloy |
| Author(s) |
Faizan Hijazi, Mostafa Omar, Justin E. Norkett, David Rowenhorst, Charles Fisher, Jaafar El Awady |
| On-Site Speaker (Planned) |
Faizan Hijazi |
| Abstract Scope |
Understanding the local mechanical properties of additively manufactured alloys is crucial for optimizing their performance in naval applications. This study investigates the correlation between grain orientations and elastic properties in wire-arc additive manufactured nickel aluminum bronze (WAAM-NAB) alloy using nano-indentation tomography. The WAAM-NAB microstructure, consisting of an α-matrix (Cu solid-solution) with κ-precipitates, was characterized using electron back-scatter diffraction to generate inverse pole figure maps. Finely spaced nano-indentation grids were employed to measure elastic modulus and hardness across the sample. The technique effectively distinguished between differently oriented grains and clearly mapped the inter-dendritic zones containing κ-precipitates. Anisotropy was observed in both elastic modulus and hardness among different grain orientations. Nano-sized precipitates dispersed within the α-grains were also detected. This approach provides a comprehensive understanding of the relationship between local microstructure and mechanical properties in WAAM-NAB alloy, offering valuable insights for optimizing the additive manufacturing process and enhancing the material's performance. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Mechanical Properties |