About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Symposium
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2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Presentation Title |
Assessment of Manufacturing Process Variability in LP-DED JBK-75 Alloy for Structural Applications |
| Author(s) |
Anannya Doris, Luis Munoz, Kurtis Watanabe, Edel Arrieta, Lawrence E. Murr, Colton Katsarelis, Paul R. Gradl, James P. Carney, Francisco Medina |
| On-Site Speaker (Planned) |
Anannya Doris |
| Abstract Scope |
This study investigated the mechanical and fracture behavior of Laser Power Directed Energy Deposition (LP-DED) additively manufactured JBK-75 as a function of geometry, temperature, and powder production. Bulk bar and thin plate tensile specimens fabricated from powders using different production methods, rotary and gas atomization, were tested over a range of temperatures. The resulting tensile properties were correlated with fractographic observations. Strength decreased systematically with increasing temperature in both specimens, while thin-wall samples showed lower overall strength, indicating greater sensitivity to geometry. Multivariate statistical analysis identified temperature as the primary factor influencing the overall mechanical response, with powder production method having a smaller secondary effect. SEM fractography showed predominantly ductile failure through microvoid coalescence, with dimple morphology evolving from finer, uniform features at lower temperatures to coarser, irregular void structures at higher temperatures. These results indicate that temperature-driven softening and void growth dominate the deformation and fracture response of JBK-75. |
| Proceedings Inclusion? |
Undecided |