Redyarsa Dharma Bintara, Yanuar Rohmat Aji Pradana, Retno Wulandari, Heru Suryanto, Didin Zakariya Lubis
Additive manufacturing has a role in term manufacturing process for creating a part. Additive manufacturing has also popular name that is called 3D printing technology. The 3D printed part is identified as composite material because its strength depends on the orientation layer and the density of material. The surface quality, printing time, and strength of 3D printed part is still observed and developed. So, the purpose of research is to observe the surface quality and strength of 3D printed part to different layer height and orientation of deposit layer in Polylactic Acid material (PLA). The experimental test involved a 3D printer machine to print the specimen regarding to ASTM D3039. Furthermore, the surface roughness of specimen was measured by using SurftestSJ-301 Mitutoyo device. While the tensile was conducted by universal tensile test machine. The layer height of the test specimen was varied from 0.15 mm to 0.25 mm with the increment of 0.5 mm for each specimen. The layer orientation of deposit material was also varied to 0o, 45o to 90o. Base on the observation and analysis, the highest roughness was on the Lh:0.25 mm (12.7 μm) with layer orientation of 45o, whereas the lowest roughness was on the Lh:0.25 mm (0.51 μm) with layer orientation of 90o. The maximum to minimum of material tensile strength were 395.64 kgf, 174.230 kgf and 72.750 kgf for orientation of deposit layer of 90o, 45o, 0o respectively. © 2023 American Institute of Physics Inc.. All rights reserved.
Mechanical Engineering Department, Universitas Negeri Malang, Jl. Semarang No.5, Jawa Timur, Kota Malang, 65145, Indonesia