About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing and Innovative Powder/Wire Processing of Multifunctional Materials
|
Presentation Title |
Melt Mixing and Element Vaporization During Laser Powder Directed Energy Deposition |
Author(s) |
Joerg Volpp |
On-Site Speaker (Planned) |
Joerg Volpp |
Abstract Scope |
During Directed Energy Deposition of metal materials using laser energy as a heat source, the melt pool surface is heated above melting temperature. Even vaporization can be induced while the powder particles incorporate into the melt pool. Both melt pool mixing with the previously deposited material or base material and element vaporization change the chemical composition within the deposited material, which can lead to unpredicted and undesired material properties.
Therefore, an experimental setup to detect vaporized elements was designed. A Co-based alloy (MetcoClad21) was deposited on the base material (S235). The materials show significantly different contents of Fe and Cr, which were used as indicators for their mixing. Spectral emissions were recorded above the melt pool and element content could be related to trends in track dimensions. Element peak intensity ratios were found to relate to element mixing and dilution. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Process Technology, Joining |