About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Metals: Multiscale and Non-Equilibrium Solidification Fundamentals
|
| Presentation Title |
Process–Microstructure–Property Correlations in Cu–Ni 70/30 Additively Manufactured at Varying Energy Densities Using Laser Wire Directed Energy Deposition |
| Author(s) |
Edgar Viamontes, Blanca Palacios, Tyler Dolmetsch, Tanaji Paul |
| On-Site Speaker (Planned) |
Edgar Viamontes |
| Abstract Scope |
Understanding the processability of conductive, corrosion-resistant alloys like Cu–Ni 70/30 is critical for advancing marine, energy, and aerospace applications. This study investigates the influence of energy density on the microstructural evolution and mechanical properties of Cu–Ni 70/30 samples fabricated via Laser Wire Directed Energy Deposition (LW-DED). The wire feedstock is melted using a blue laser, which is absorbed more efficiently by copper alloys. Laser powers of 700, 850, and 1000 Watts, applied under a functional set of parameters, produced representative energy densities of 46.7, 56.7, and 66.7 J/mm³, respectively, with corresponding hardness values decreasing from 120.7 to 107.3 HV. Optical microscopy and microhardness testing confirmed that decreasing energy density promotes finer grains and increased hardness, though with reduced interlayer fusion. These insights help define a viable processing window balancing microstructural refinement and mechanical performance, while also serving to inform predictive models for non-equilibrium solidification phenomena in additive manufacturing. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Composites, Copper / Nickel / Cobalt |