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ANALISIS KEKERASAN MIKRO DAN STRUKTUR MIKRO TI-6AL-4V GRADE 23 PADA PROSES SELECTIVE LASER MELTING

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This study aims to analyze the effect of Selective Laser Melting (SLM) process parameters on the microhardness and microstructure of Ti-6Al-4V Grade 23 titanium alloy. This material is widely used in biomedical and aerospace applications due to its high strength-to-weight ratio, good corrosion resistance, and excellent biocompatibility. However, laser-based additive manufacturing processes often generate microdefects such as porosity, lack of fusion, and keyhole, which can reduce the mechanical properties of the material. Therefore, optimization of process parameters is required to obtain optimal printed quality. The research method employed was an experimental approach using a Taguchi L9+1 design involving four main parameters, namely laser power, scanning speed, hatch spacing, and layer thickness. The specimens were fabricated using a TruPrint 2000 SLM machine with predetermined parameter variations. Microhardness testing was conducted using the Vickers microhardness method, while microstructural and defect characterization was performed using an optical microscope. The results show that variations in SLM parameters significantly affect the microhardness values and microstructural characteristics. The highest hardness was obtained at an optimal volumetric energy density, which produced a finer microstructure and lower porosity. In contrast, insufficient energy input caused lack of fusion defects, whereas excessive energy triggered gas porosity. Thus, proper control of SLM process parameters is essential to produce Ti-6Al-4V Grade 23 components with good mechanical and microstructural quality.

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Detail Information

Series Title

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Call Number

T1931742025

Publisher

Indralaya : Prodi Teknik Mesin, Fakultas Teknik Universitas Sriwijaya., 2025

Collation

xxvii, hlm.; ilus.; tab.; 29 cm.

Language

Indonesia

ISBN/ISSN

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Classification

671.560 7

Content Type

Text

Media Type

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Carrier Type

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Edition

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Subject(s)

Teknik Pengelasan
Prodi Teknik Mesin

Specific Detail Info

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Statement of Responsibility

MI

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