Glaskova-Kuzmina Tatjana, Dejus Didzis, Jātnieks Jānis, Aniskevich Andrey, Sevcenko Jevgenijs, Sarakovskis Anatolijs, Zolotarjovs Aleksejs
Baltic3D.eu, Braslas 22D, LV-1035 Riga, Latvia.
Institute for Mechanics of Materials, University of Latvia, Jelgavas 3, LV-1004 Riga, Latvia.
Polymers (Basel). 2023 Jan 8;15(2):324. doi: 10.3390/polym15020324.
This paper aimed to estimate the effect of post-printing cooling conditions on the tensile and thermophysical properties of ULTEM 9085 printed parts processed by fused deposition modeling (FDM). Three different cooling conditions were applied after printing Ultem samples: from 180 °C to room temperature (RT) for 4 h in the printer (P), rapid removal from the printer and cooling from 200 °C to RT for 4 h in the oven (O), and cooling at RT (R). Tensile tests and dynamic mechanical thermal analysis (DMTA) were carried out on samples printed in three orthogonal planes to investigate the effect of the post-printing cooling conditions on their mechanical and thermophysical properties. Optical microscopy was employed to relate the corresponding macrostructure to the mechanical performance of the material. The results obtained showed almost no difference between samples cooled either in the printer or oven and a notable difference for samples cooled at room temperature. Moreover, the lowest mechanical performance and sensitivity to the thermal cooling conditions were defined for the Z printing direction due to anisotropic nature of FDM and debonding among layers.
本文旨在评估后打印冷却条件对通过熔融沉积建模（FDM）加工的ULTEM 9085打印部件的拉伸性能和热物理性能的影响。打印Ultem样品后应用了三种不同的冷却条件：在打印机中从180°C冷却至室温（RT）4小时（P），从打印机中快速取出并在烤箱中从200°C冷却至RT 4小时（O），以及在室温下冷却（R）。对在三个正交平面上打印的样品进行了拉伸试验和动态机械热分析（DMTA），以研究后打印冷却条件对其机械性能和热物理性能的影响。采用光学显微镜将相应的宏观结构与材料的机械性能联系起来。所得结果表明，在打印机或烤箱中冷却的样品之间几乎没有差异，而在室温下冷却的样品则有显著差异。此外，由于FDM的各向异性性质和层间脱粘，Z打印方向的机械性能最低，对热冷却条件的敏感性也最低。
