Fathulloh, Annas and , Masyrukan, S.T., M.T. (2026) Pengaruh Komposisi Media Pendingin Larutan (CaCo)_3 25% Terhadap Kekerasan Dan Struktrur Mikro (Scanning Electron Microscopy) Pada Paduan Aluminium Silikon Yang Telah Mengalami Solution Treatment Dan Artificial Aging. Skripsi thesis, Universitas Muhammadiyah Surakarta.
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Abstract
Aluminium-silicon (Al-Si) alloys are widely used in the automotive and manufacturing industries due to their low density, good corrosion resistance, and high castability. This study aims to investigate the effect of water and a 25% CaCO₃ solution as quenching media on the hardness and microstructure of aluminium-silicon alloys after Solution Treatment and artificial aging processes. The specimens were subjected to solution heat treatment at 580°C for 20 minutes, followed by quenching using water and a 25% CaCO₃ solution, and then artificial aging at 200°C for 20 minutes. Characterization was carried out through Vickers microhardness testing, Scanning Electron Microscopy (SEM), and Energy Dispersive X-Ray (EDX) analysis. The results showed that the hardness value of the raw material, which was 88.84 HV, increased to 94.02 HV after quenching in water, while the hardness value increased to 89.32 HV when quenched in the 25% CaCO₃ solution. After artificial aging, the hardness values became 88.82 HV for the water-quenched specimen and 89.52 HV for the specimen quenched in the 25% CaCO₃ solution. SEM observations revealed that the water quenching medium produced a more homogeneous particle distribution than the 25% CaCO₃ solution. EDX analysis indicated that aluminium and silicon were the dominant elements, while calcium was detected in the specimens quenched using the 25% CaCO₃ solution. Based on the results, it can be concluded that the quenching medium influences the hardness and microstructure of aluminium-silicon alloys, with water producing the highest hardness value of 94.02 HV.
| Item Type: | Thesis (Skripsi) |
|---|---|
| Uncontrolled Keywords: | Aluminium-Silicon (Al-Si), Quenching, Artificial Aging, 25% CaCO₃, Hardness, Microstructure. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > Indutry Mechine |
| Divisions: | Fakultas Teknik > S1 Teknik Mesin |
| Depositing User: | ANNAS FATHULLOH |
| Date Deposited: | 24 Jul 2026 06:30 |
| Last Modified: | 24 Jul 2026 06:31 |
| URI: | http://eprints.ums.ac.id/id/eprint/146358 |
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