Skripsi

STUDI EKSPERIMENTAL SIFAT FISIK DAN NILAI KEKERASAN AMC BERPENGUAT 2% PKSA DAN 2% SIC DENGAN METODE STIR-SQUEEZE CASTING

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This study aims to determine the effect of the Stir-Squeeze Casting process with pressure variations of 3 tons, 6 tons, and 9 tons on the mechanical properties and micro characteristics of 6063 aluminum composites. The Stir-Squeeze Casting process is carried out to homogenize the alloy, reduce porosity, and improve the quality of the castings. The tests conducted included Brinell hardness testing, microstructure observation using an optical microscope, chemical composition analysis using X-Ray Fluorescence (XRF), and morphological characterization using a Scanning Electron Microscope (SEM). The hardness test results showed that an increase in loading (Pressure Squeeze) resulted in an increase in the average hardness value of the specimens, where 9 tons of pressure produced the highest hardness value compared to 3 tons and 6 tons, while 3 tons of pressure produced the lowest hardness value compared to 6 and 9 tons. Variations in loading (Pressure Squeeze) have a significant effect on the hardness values and microstructure of Al 6063-based Aluminum Matrix Composites (AMC). The application of excessive and unresearched loading in the Squeeze Casting process can cause damage to the material. Therefore, it is necessary to collect extensive literature studies to obtain information on parameters and variations of testing that are more structured, safe, and optimal. Microstructural observations show that as the load increases, the grain size becomes larger and wider, and the phase distribution becomes more uniform. As the squeeze load increases from 3 tons to 9 tons, the material becomes denser, which means that the density increases and the porosity decreases. The results of X-Ray Fluorescence (XRF) analysis detected an increase in the chemical composition of the 6063 aluminum composite with silicon (Si) and a small amount of other alloying elements. Silicon (Si) contains abundant silicon oxide (SiO2), which is useful for increasing the strength of a material. Meanwhile, SEM test results show that samples with higher pressure have a denser surface morphology and minimal porosity, supporting the mechanical test results. Adding a small amount of Magnesium (Mg) in the material casting process also helps improve material homogeneity by utilizing its wettability properties. It can also be concluded that the distribution of reinforcing particles (PKSA and SiC) is evenly distributed, the material surface appears dense and has minimal porosity, proving that the material has become more homogeneous. Overall, this study proves that the combination of the Stir Casting and Squeeze Casting processes with increased pressure up to 9 tons is capable of producing 6063 aluminum alloys with better mechanical quality and microstructure. The products resulting from this study are recommended for use in light engineering applications.

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Detail Information

Series Title

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Call Number

T1858952025

Publisher

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

Collation

xxix, 75 hlm.; ilus.; tab.; 29 cm.

Language

Indonesia

ISBN/ISSN

-

Classification

621.807

Content Type

Text

Media Type

unmediated

Carrier Type

other (computer)

Edition

-

Subject(s)

Prodi Teknik Mesin
Fisik dan Nilai Kekerasan AMC

Specific Detail Info

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Statement of Responsibility

MI

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