About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
Microstructure and Strengthening Mechanisms in Cu-10Sn Alloys Manufactured by Laser Beam Powder Bed Fusion |
| Author(s) |
Kangwei Chen, Simon Ringer, Keita Nomoto |
| On-Site Speaker (Planned) |
Kangwei Chen |
| Abstract Scope |
Laser beam powder bed fusion (LB-PBF) of Cu-10Sn alloys presents unique opportunities to produce components with complex geometries and superior mechanical properties compared to traditional manufacturing routes. However, key questions remain unresolved regarding the formation mechanism and role of the Sn-rich δ phase. Moreover, while powder feedstock characteristics are known to influence microstructure, their impact on mechanical properties has not been systematically elucidated. In this study, we investigate the formation mechanism of the δ phase and demonstrate that its size, shape, and distribution vary with local solidification conditions. By comparing Cu-10Sn powders from three different suppliers, we identify distinct variations in powder geometry and composition, which affect melt pool dynamics and microstructural development. These microstructural differences result in significant variations in mechanical properties across as-built samples. This work establishes critical relationships between powder characteristics, structure, and mechanical properties, thereby enhancing the reliability and reproducibility of Cu-10Sn components manufactured by LB-PBF. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, |