Khakim, Luthfil and , Masyrukan, S.T., M.T. (2026) Pengaruh Komposisi Media Pendingin Larutan CaCO3 25% Terhadap Kekerasan dan Struktur Kristal X-Ray Diffraction (XRD) Paduan Aluminium Silikon yang Telah Mengalami Proses Solution Treatment dan Artificial Aging. Skripsi thesis, Universitas Muhammadiyah Surakarta.
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Abstract
Aluminum-Silicon (Al-Si) alloy is widely used in industrial applications due to its low density, excellent corrosion resistance, and mechanical properties that can be enhanced through heat treatment. This study aims to analyze the effect of water and 25 wt.% CaCO₃ solution as quenching media during the solution treatment and artificial aging processes on the hardness and crystal structure of Aluminum-Silicon (Al–Si) alloy. An experimental method was employed using Al-Si alloy specimens containing 86.39% Al and 10.10% Si. The specimens were subjected to solution heat treatment at 580°C, followed by quenching in water and a 25% CaCO₃ solution, and subsequently artificially aged at 200°C. Crystal structure characterization was performed using X-Ray Diffraction (XRD), while hardness testing was conducted using the Micro Vickers method. The results showed that all specimens consisted of two primary phases, namely Aluminum (Al) with a Face-Centered Cubic (FCC) crystal structure and Silicon (Si) with a Diamond Cubic crystal structure. The quenching and artificial aging treatments did not produce any new phases; however, they caused changes in the diffraction peak intensities, indicating modifications in the crystal structure characteristics. The highest hardness value was obtained from the water-quenched specimen, reaching 94.02 HV, whereas the specimen quenched in the 25% CaCO₃ solution exhibited a hardness of 89.32 HV, which increased to 89.52 HV after artificial aging. In conclusion, water as the quenching medium provided a greater improvement in hardness than the 25% CaCO₃ solution. Furthermore, the applied heat treatment did not alter the primary phases or crystal structures of the Aluminum-Silicon alloy.
| Item Type: | Thesis (Skripsi) |
|---|---|
| Uncontrolled Keywords: | Aluminum-Silicon (Al-Si), Quenching, Artificial Aging, CaCO₃, XRD |
| Subjects: | T Technology > T Technology (General) T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Fakultas Teknik > S1 Teknik Mesin |
| Depositing User: | LUTHFIL KHAKIM |
| Date Deposited: | 27 Jul 2026 06:26 |
| Last Modified: | 27 Jul 2026 06:26 |
| URI: | http://eprints.ums.ac.id/id/eprint/146394 |
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