| About this Abstract |
| Meeting |
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
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| Symposium
|
2024 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2024)
|
| Presentation Title |
Residual Stress Evaluation of EB-PBF Produced High Strength Mo-7Re-1HfC Alloy via Neutron Diffraction |
| Author(s) |
Haozhi Zhang, Jenny Forrester, Christopher Fancher, Patxi Fernandez-Zelaia, Chris Ledford, Tim Horn |
| On-Site Speaker (Planned) |
Haozhi Zhang |
| Abstract Scope |
Electron beam powder bed fusion (EB-PBF) emerges as a promising additive manufacturing (AM) technology capable of handling refractory alloys with limited ductility, thanks to its elevated build temperatures and tightly controlled vacuum environment. From the composition perspective, alloying of Re in refractory metal has proven to be an effective route to enhance the ductility of the matrix. Furthermore, incorporating high-melting-point dispersion strengtheners has been recognized for increasing the high-temperature strength of otherwise ductile materials. In this context, a customized Mo-7Re-1HfC (wt.%) alloy serves as the raw powder material for EB-PBF fabrication in the present study. The investigation delves into the processing map of this novel material, scrutinizing the corresponding microstructure and process-induced defects through metallurgical and micro-CT analyses. Moreover, the assessment of residual strain along the build direction of the as-fabricated sample is conducted using neutron diffraction, a non-destructive method offering novel insights into process-induced defects. |
| Proceedings Inclusion? |
Definite: Post-meeting proceedings |