About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Materials
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Presentation Title |
The Effect of Fused Filament Fabrication Thermal Post-Processing Conditions on the Mechanical Strength and Dimensional Accuracy on ULTEM® 1010 |
Author(s) |
Callie Zawaski, Christopher B. Williams |
On-Site Speaker (Planned) |
Callie Zawaski |
Abstract Scope |
Fused filament fabricated (FFF) additive manufactured parts are inherently anisotropic due to the weak bonds that form caused by the deposition of hot material onto material that has cooled below the glass transition temperature (Tg). While the polymer is above its Tg, the polymer chains have mobility to entangle resulting in stronger bonds between the polymer interfaces. However, the material must cool during printing in order to preserve the desired shape and prevent part deformation. In this paper, the authors propose a post-processing method for 3D printed thermoplastics to improve the strength of the parts by allowing them to remain above Tg without significant deformation. The method is tested using ULTEM 1010® where the parts are heated for up to 24 hours at 260°C. This post-processing technique can be applied to 3D printed thermoplastics in order to reduce or eliminate part anisotropy. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |