Annealing effect on mechanical properties of 3D printed composites

被引：19
作者：
Valvez, S. [1 ]
Silva, A. P. [1 ]
Reis, P. N. B. [2 ]
Berto, F. [3 ]
机构：
[1] Univ Beira Interior, Dept Electromech Engn, C MAST, Covilha, Portugal
[2] Univ Coimbra, CEMMPRE, Dept Mech Engn, Coimbra, Portugal
[3] Norwegian Univ Sci & Technol, Dept Ind & Mech Engn, Trondheim, Norway
来源：
4TH INTERNATIONAL CONFERENCE ON STRUCTURAL INTEGRITY (ICSI 2021) | 2022年 / 37卷
关键词：
Fused filament fabrication; Mechanical properties; Thermal annealing; OPTIMIZATION; QUALITY;
D O I：
10.1016/j.prostr.2022.02.004
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
Fused filament fabrication (FFF) is the most popular additive manufacturing method, with which it is possible to obtain highly complex three-dimensional parts without wasting materials. In order to improve the mechanical properties of 3D printed materials, literature suggests the thermal annealing process. Therefore, this work aims to study the effect of thermal annealing on the bending properties of PETG and PETG reinforced with carbon and aramid fibres. For this purpose, the samples were printed using a B2X300 printer, with a hardened steel nozzle of 0.6 mm diameter, and the printing parameters were optimized for each material. Five specimens were tested according to ASTM D790-17 for each condition. Three temperatures (90 degrees C, 110 degrees C and 130 degrees C) and three annealing times (30 min, 240 min and 480 min) were used to study the benefits obtained with the thermal annealing. Finally, the samples were evaluated in terms of geometrical parameters, hardness, and flexural properties. Regardless of the materials studied, the best mechanical properties were obtained for the highest temperature and the longest exposure time, but due to the high geometric distortions, a temperature of 90 degrees C and an exposure of 30 minutes proved to be more effective. (C) 2022 The Authors. Published by Elsevier B.V.
引用
收藏
页码：738 / 745
页数：8
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