Mechanical Properties Investigation Of 3D Printed Parts Under The Exclusion Of Oxygen

Ahmad Salim, Muhammad Ikramullah (2020) Mechanical Properties Investigation Of 3D Printed Parts Under The Exclusion Of Oxygen. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

In order to obtain the prototype in shorter times and in cost-effectiveness, 3D printing, also known as additive manufacturing (AM), have been introduced. AM is also capable of manufacturing complex part geometry without any additional tools and jigs. Fused deposition modeling (FDM) is one of the most popular techniques in AM. However, its design manufacturability and printed parts quality are the main limitations of FDM in terms of surface roughness, flexural strength and dimensional accuracy. In this research, the 3D printing process method using FDM were being discussed to examined the effect of pre-processing and in-processing techniques on mechanical properties which is specified on the surface roughness and the manufacturability of an open source 3D printing machine. As for the pre-processing, Taguchi analysis was conducted to determined the optimal printing parameter setting. Additionally, for in-processing technique, inert gas had been introduced to control thermal degradation as for the atmosphere condition to exclude the presence of the oxygen in the 3D printing chamber. Based on the comparison made, inert gas presence in the 3D printing chamber was selected at the best improvement techniques because of its capability to improve the whole printed parts quality including surfaced roughness, tensile strength and dimensional accuracy. In general, it was found that, the 3D printed parts surface roughness was improve by 48.29% for nitrogen ambient on 3D printer condition comparing to the oxygen ambient. For the Ra value of the optimum result for the surface roughness on the oxygen ambient which is 1.3667μm while the nitrogen ambient is reduce to 0.7067μm show the result for the in-processing method were significantly reduces. This study has proven that the improvement method during in-processing technique are better on the exclusion of the oxygen.

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