Abstract
Extrusion deposition additive manufacturing produces parts with inherent porosity, which typically manifests as easily accessible voids between beads. This open porosity can also be accompanied by voids within the beads themselves, and both types can impact a part’s desired performance. Porosity is influenced by a variety of factors, including infill percentage, layer height, nozzle diameter, print speed, and raster orientation. While their influence on mechanical properties and porosity have been studied previously, there has been minimal work connecting print parameters to porosity and subsequently to mechanical performance. This study investigates the relationships between print parameters, volumetric porosity, and mechanical performance. In addition, this study measures both open and closed porosity through use of a helium pycnometer rather than image analysis of a cross-section. Thus, this study will identify correlations between the volumetric density of parts and the resulting mechanical performance as a function of print parameters.
Original language | English |
---|---|
Pages | 766-778 |
Number of pages | 13 |
State | Published - 2019 |
Event | 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019 - Austin, United States Duration: Aug 12 2019 → Aug 14 2019 |
Conference
Conference | 30th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2019 |
---|---|
Country/Territory | United States |
City | Austin |
Period | 08/12/19 → 08/14/19 |
Funding
Research sponsored by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Industrial Technologies Program, under contract DE-AC05-00OR22725 with UT-Battelle, LLC. This work was supported in part by Oak Ridge Institute for Science and Education through the Higher Education Research Experiences Program (HERE).
Funders | Funder number |
---|---|
U.S. Department of Energy | |
Office of Energy Efficiency and Renewable Energy | DE-AC05-00OR22725 |
Oak Ridge Institute for Science and Education |