| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in the State-of-the-Art of High Temperature Alloys
|
| Presentation Title |
Microstructure-property Linkage of LW-DED Haynes 282® Superalloy to Fabrication and Post-processing Heat Treatment |
| Author(s) |
Rui Feng, Kristin Tippey, Nicole Gonzalez Ceballos, Chantal Sudbrack |
| On-Site Speaker (Planned) |
Rui Feng |
| Abstract Scope |
Laser-wire direct energy deposition (LW-DED) is an attractive lower-cost alternative to powder-bed fabrication due to less material scrap. Here the LW-DED optimal processing windows are reported for Haynes 282 superalloy for two wire diameters by examining a wide processing space. Fabrication with the larger 1.1 mm wire diameter was more robust. The γ’-precipitates, carbides (M23C6, MC), and room-temperature compression behavior after printing and heat treatment were examined using SEM-EDS, EBSD, and TEM for large-wire cubes. The optimal processing conditions showed fewer fine-grain colonies at the interlayer and improved density, linking with a proper linear heat-input window. However, the printing variables' effect on γ’ precipitates and carbides (size, morphology, and fraction) is negligible. Moreover, various solution temperatures ranging from 1150 °C to 1240 °C with aging were employed to explore optimal solution temperatures for full recrystallization. Small deviations in compressive yield strengths among large-wire cubes correlated to the bimodal grain-size effect. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Characterization |