Investigation of strength material for additive manufacturing using 3D metal printer

Nezam, Ahmad Nazirul Mubin (2024) Investigation of strength material for additive manufacturing using 3D metal printer. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Additive manufacturing of materials is also known as 3D Printing. 3D Printing is a novel and rapid emerging technology in automotive industry. As the autmotive industry is one of the most competitive industries worldwide, new market and design trends emerge continuously, requiring new manufacturing approaches to comply with the automotive industry. Additive manufacturing provides an important competitive edge to this industrial domain, acting as a disruptive approach by shortening products design and development, delivering flexibility on production and producng optimized automotive components and customized vehile products uopn request. Among the 3D printing techniques, Selective Laser melting (SLM) is one of the effective technique in additive manufacturing process. The main objective of this thesis is to study the strength material for additive manufacturing of S 316L-A11 powder with different specimen thickness and orientations. In this study, specimens were prepared according to ASTM Standard E23 for Charpy impact test and ASTM E8 for tensile test and the same standard was also applied for the laboratory testing respectively. The Charpy specimens were fabricated to different thickness of 5mm, 7.5mm and 10mm by using Ermaksan Enavision 120 SLM 3D Printer. This study parameter selection are 230V, 5m/s scanning speed, 32A, 300W scanning speed, argon and nitrogen as inert gases, and 2500 ppm of oxygen level. Charpy Impact Test on the specimens are performed on the flat samples and subsequent materials comparison are frequently conducted against results obtained from impact tests perfomed using Charpy specimens. The absorbed energy, strain gauge signal and tensile test results the strength material of S 316 L-A11. The result shows that specimen of S 316 L-A11 with thickness of 10.0mm has the greater absorbed energy value. The area under the strain-time graph, maximum strain and absorbed energy are all significantly influenced by thickness of specimens. This study also made a comparison between strain-time graph between S 316 L-A11 and SS304. The result of the comparison shows that S 316 L-A11 is more preferable material to be used in additive manufacturing due to the material strength.

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