| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Cold Spray Additive Manufacturing: Part Quality and Performance
|
| Presentation Title |
The Erosion Regime and the Associated Microstructural Evolution: A Site-specific Study of a High-velocity Copper Microparticle Impacting Copper |
| Author(s) |
Ahmed Alade Tiamiyu, Christopher A. Schuh |
| On-Site Speaker (Planned) |
Ahmed Alade Tiamiyu |
| Abstract Scope |
Erosion regimes in cold spray processing are associated with significant material loss, yet they are challenging to study due to the length- and time- scales of the impacts and the extremely large strains and strain rates associated with the process. The hydrodynamic penetration (HDP) of microparticles associated with the erosion regimes are typically studied at a coarser scale using a gun to accelerate “macroparticles”, a stark departure from the typical particle size in cold-spray, 10-100 µm. Using a laser-induced particle impact tester, we launch single copper microparticles at impact velocities above 1 km/s where HDP and erosion set on. In situ videography and post-mortem characterization using advanced dictionary indexing-electron backscatter diffraction and scanning transmission electron microscopy together provide the first confirmation of solid ejecta associated with erosion from the impact site. We also report the associated materials mechanics of HDP and the mechanisms that prevail under such extreme conditions. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Powder Materials, Characterization, Copper / Nickel / Cobalt |