About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Towards directed energy deposition of metals using polymer-based supports: porosity of 316L stainless steel deposited on carbon-fiber-reinforced ABS |
Author(s) |
Rebecca Kurfess, Kyle Saleeby, Thomas Feldhausen, Kenton Fillingim, A. John Hart, David Hardt |
On-Site Speaker (Planned) |
Rebecca Kurfess |
Abstract Scope |
Directed energy deposition (DED) is increasingly valuable to many industries because of its high deposition rates relative to other metal additive manufacturing processes, but the design space of DED is limited. For instance, steep overhangs are difficult or impossible to manufacture. Polymer-based support structures could help address this challenge. The viability of DED on polymer composite substrates has begun to be explored, specifically with 316L stainless steel on carbon-fiber-reinforced ABS substrates. Monolithic metal components can be deposited on the polymer, but it was found that gas release during polymer degradation causes porosity due to gas entrapment in the metal. An interlayer cooling time was introduced to reduce polymer degradation and decrease the porosity due to gas entrapment, but this led to porosity from lack of fusion. Here, an analysis of these mechanisms, resulting mechanical properties, and the parameter space enabling effective DED of metals using polymer supports are presented. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |