SINTA BELA, . (2022) ANALISIS SIFAT MEKANIK PADA PADUAN Al-Cu-Mg/SiC DENGAN VARIASI KOMPOSISI FILLER SIC MENGGUNAKAN METODE STIR CASTING. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.
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Abstract
Penelitian ini bertujuan untuk menganalisa pengaruh penambahan SiC terhadap sifat mekanik dan struktur mikro pada paduan Al-Cu-Mg/SiC dengan metode stir casting. Aluminium digunakan sebagai matriks, SiC digunakan sebagai filler dengan presentase 15 wt%, 17,5 wt%, dan 20 wt%. Mg 1,8 wt% ditambahkan untuk meningkatkan wettability dan penambahan Cu 4,4 wt% ditambahkan karena memiliki respon yang baik terhadap perlakuan panas khususnya pada paduan aluminium dan silicon. Metode stir casting dilakukan untuk memeprmudah pencampuran antara matriks dengan partikel penguat, dengan kecepatan stir 250 rpm. Setelah dilakukan proses pengujian maka hasil pengujian X-Ray Diffraction (XRD) menunjukan fasa yang terbentuk α-Al , Ɵ-Al2Cu dan presipitat Mg2Si, pada komposisi SiC 17,5 wt% memiliki puncak intensitas tertinggi. Hasil pengujian Scanning Electron Microscopy (SEM) dan Energy Dispersive Spectroscopy (EDS) menunjukan bahwa pada setiap sampel terkandung unsur SiC. Pada pengujian Hardners Vikers menunjukan nilai kekerasan tertingi ialah pada penambahan komposisi SiC 15 wt% sebesar 166 kg/mm2. ************************************** This study aims to analyze the effect of the addition of SiC on the mechanical properties and microstructure of Al-Cu-Mg/SiC alloys using the stir casting method. Aluminum was used as a matrix, SiC was used as a filler with a percentage of 15 wt%, 17.5 wt%, and 20 wt%. 1.8% Mg was added to increase the wettability and 4.4% Cu was added because it has a good response to heat treatment, especially in aluminum and silicon alloys. The stir casting method is carried out to facilitate the mixing of the matrix with reinforcing particles, with a stir speed of 250 rpm. After the testing process was carried out, the results of the X-Ray Diffraction (XRD) test showed that the phases formed were α Al, Ɵ Al2Cu and Mg2Si precipitates, at the composition of SiC 17.5 wt% having the highest peak intensity. The results of the Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) tests show that each sample contains SiC elements. The Vikers Hardness test showed that the highest hardness value was the addition of 15 wt% SiC composition of 166 kg/mm2.
| Item Type: | Thesis (Sarjana) |
|---|---|
| Additional Information: | 1). Dr. Anggara Budi Susila, M.Si. ; 2). Dr. Erfan Handoko, M.Si. |
| Subjects: | Sains > Kimia |
| Divisions: | FMIPA > S1 Kimia |
| Depositing User: | PKL . |
| Date Deposited: | 19 Nov 2024 03:03 |
| Last Modified: | 19 Nov 2024 03:03 |
| URI: | http://repository.unj.ac.id/id/eprint/52144 |
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