| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
2025 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-60: Energy Density and Infill Angles In Tailoring Laser-Wire Directed Energy Deposition Microstructure |
| Author(s) |
Matthew D. Engquist, Amir Shakibi, Mohsen Eshraghi |
| On-Site Speaker (Planned) |
Matthew D. Engquist |
| Abstract Scope |
Location-specific microstructure is a key goal for additive manufacturing, with local solidification influenced by controlling thermal gradients. In laser-wire directed energy deposition (LW-DED), scan direction, laser power, and scanning speed shape crystallographic texture. This work employed a Meltio M450 printer with two parameter sets: a “high power” regime (1200 W at 800 mm/min) and a “low power” regime (750 W at 500 mm/min), while varying print infill angles. Samples were analyzed via optical microscopy and EBSD to reveal melt pool geometry, texture, and grain metrics. Sectioning parallel to infill angles yielded alternating <100> and <110> textures, governed by epitaxial growth at the melt pool center. In contrast, orthogonal infill angles produced extended <100> grains spanning multiple layers. Despite similar energy densities, high-power prints showed larger grains and stronger <100> texture, underscoring the potential of LW-DED to achieve location-specific microstructures akin to those demonstrated in laser powder bed fusion. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Additive Manufacturing, Solidification, |