| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Materials Design and Alloy Development VI – Closed-Loop Alloy Design
|
| Presentation Title |
Non-equilibrium Phase Transformations in Laser Powder Bed Fused Nickel-aluminum Bronze Using Atom-probe Tomography Analysis |
| Author(s) |
Farzad Khodabakhshi, Mohsen Mohammadi |
| On-Site Speaker (Planned) |
Farzad Khodabakhshi |
| Abstract Scope |
Nickel-aluminum bronze (NAB), as a strategic alloy for marine applications, was processed using laser powder bed fusion (LPBF), considering the crucial impact for the consolidation of practical components with geometrical complexity upon layer-by-layer deposition of additive manufacturing (AM). Based on the goal of strength-ductility trade-off in the mechanical response of additively manufactured NAB alloy, post-annealing heat treatment cycles were applied to the as-built processing state. As the leading object of the present research, phase transformations in NAB alloy upon LPBF consolidation and subsequent heat treatments were characterized using advanced electron microscopy techniques and compared with cast and wire-arc additively manufactured (WAAM) alloys. Electron backscattering diffraction (EBSD), scanning transmission electron microscopy (STEM), and atom probe tomography (APT) analyses revealed the occurrence of martensitic phase transformation and non-equilibrium precipitation due to rapid cooling inherent in LPBF, which was not reported before for this alloy under other states of technological manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, Characterization |