About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing and Innovative Feedstock Processing for Multifunctional Materials
|
| Presentation Title |
Interfacial Defect Formation in Multi-Material Additive Manufacturing: Effects of Laser Wavelength, Powder Composition, and Build-Plate Conditions |
| Author(s) |
Nahal Ghanadi, Tyler Finch, Ryan knighton, Nick Wannenmacher, Somayeh Pasebani |
| On-Site Speaker (Planned) |
Nahal Ghanadi |
| Abstract Scope |
Multi-material additive manufacturing enables fabrication of functionally integrated structures, but defect formation at dissimilar alloy interfaces remains a critical challenge. This work investigates IN625-GRCop42 systems processed by powder-laser directed energy deposition in mixed-powder and bimetallic configurations. A range of IN625-GRCop42 mixed-powder compositions is examined to determine how process-induced mixing affects local chemistry, microstructure, and crack susceptibility. In parallel, bimetallic deposits are fabricated using different build-plate materials and temperatures to evaluate the effects of substrate chemistry and thermal boundary conditions on defect formation. Infrared and blue-laser platforms are compared to assess wavelength-dependent melt-pool behavior and interfacial mixing. Computational fluid dynamics simulations in FLOW-3D predict melt-pool flow, bead morphology, thermal fields, and compositional gradients. Crack morphology, microstructure, and elemental redistribution are characterized using optical microscopy, SEM, and EDS. The results clarify how laser wavelength, composition, substrate condition, and thermal history affect interfacial microstructure and cracking in IN625-GRCop42 multi-material components for high-temperature applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Copper / Nickel / Cobalt, High-Temperature Materials |