About this Abstract |
| Meeting |
TMS Specialty Congress 2026
|
| Symposium
|
World Congress on Reproducibility, Qualification, and Standards Development of Additive Manufacturing and Beyond (RQSD 2026)
|
| Presentation Title |
Electron Beam Powder Bed Fusion Scan Strategy Research to Support Standardization |
| Author(s) |
Jake T. Benzing, Enrico Lucon, Nik Hrabe |
| On-Site Speaker (Planned) |
Jake T. Benzing |
| Abstract Scope |
Electron beam powder bed fusion (PBF-EB) scan strategies for parts of varying sizes and scan line lengths can inadvertently produce significant changes in crystallographic texture and mechanical properties in Ti-6Al-4V. These variations appear even at scan line lengths well below the machine manufacturer’s recommended maximum. Differences in α-lath thickness, prior β-grain size, and β-phase fraction were ruled out as primary causes. Mechanical testing showed that tensile strength along the build direction and fracture toughness perpendicular to it were approximately 8% and 40% higher, respectively, for long scan line lengths, aligning with the observed texture differences. However, further increases in scan length caused unstable melting and lack-of-fusion porosity, reducing mechanical performance. These findings highlight the need to better understand scan-strategy–driven texture evolution to ensure consistent material behavior. Research directions will be discussed in the context of supporting development of ASTM/ISO 52911-3, an emerging design standard for PBF-EB of metallic materials. |
| Proceedings Inclusion? |
Undecided |