Pengaruh Temperatur Aging Terhadap Karakteristik Fisik Dan Mekanik Paduan Cor Al-Mg-Si Foam Menggunakan Space Holder NaCl.

Maulidana, Reynald Renanda (2022) Pengaruh Temperatur Aging Terhadap Karakteristik Fisik Dan Mekanik Paduan Cor Al-Mg-Si Foam Menggunakan Space Holder NaCl. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Aluminium merupakan logam ringan yang diaplikasikan sebagai komponen kendaraan. Aluminium foam hadir dengan sifat penyerapan energi yang lebih baik untuk diaplikasikan pada komponen kendaraan seperti crash box. Pengecoran paduan Al-Mg-Si dengan space holder NaCl sebanyak 60% dilakukan untuk menghasilkan struktur aluminium foam open-cell. Pengecoran paduan Al-Mg-Si dan preheat NaCl dilakukan pada temperatur 750°C. NaCl dihilangkan dari hasil cor melalui leaching dan hasil cor dipotong sesuai ukuran spesimen untuk selanjutnya diberi perlakuan panas. Perlakuan panas yang dilakukan berupa solution treatment pada 530°C selama 100 menit, diikuti quenching udara, artificial aging selama 7 jam dengan variasi temperatur 150°C, 165°C, dan 180°C. Aluminium foam hasil perlakuan panas diuji karakteristik fisik dan mekaniknya melalui pengujian densitas dan porositas, pengujian XRD, pengujian mikroskop stereo, pengujian SEM, pengujian kekerasan, pengujian kompresi, dan pengujian impak. Hasil pengujian menujukkan bahwa densitas dan porositas rata-rata aluminium foam sebesar 1,503 g/cm3 dan 51,272%. Ukuran pori rata-rata yang dihasilkan sebesar 4,086 mm sesuai dengan ukuran NaCl yang digunakan. Perlakuan panas yang diberikan berpengaruh terhadap hasil XRD dan struktur mikro. Hasil pengujian XRD menunjukkan adanya pergeseran peak α-aluminium tertinggi yang mengindikasikan adanya presipitat. Selain itu, peningkatan FWHM peningkatan lattice constant mengindikasikan adanya peningkatan sifat mekanik. Struktur mikro aluminium foam hasil SEM-EDX menunjukkan adanya bintik hitam berukuran sangat kecil yang tersebar dalam matriks α-aluminium. Perbedaan terdapat pada persentase berat Mg2Si pada masing-masing spesimen. Peningkatan persentase berat Mg2Si berpengaruh terhadap karakteristik mekanik aluminium foam. Spesimen AT 180 memiliki karakteristik mekanik berupa kekerasan vickers sebesar 91,7 VHN, kekuatan kompresi sebesar 87,790 MPa, dan penyerapan energi sebesar 21,885 MJ/m3. Karakteristik mekanik yang dihasilkan oleh spesimen AT 180 merupakan yang tertinggi dibandingkan dengan spesimen Non-HT, AT 150, dan AT 165. Spesimen AT 180 juga memiliki energi impak sebesar 1,336 J dan kekuatan impak sebesar 16,701 kJ/m2. Perlakuan panas dengan variasi peningkatan temperatur aging dari 150°C hingga 180°C dapat meningkatkan karakteristik mekanik aluminium foam sehingga berpotensi diaplikasikan sebagai filler crash box.
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Aluminum is a light metal that applied as a vehicle component. Aluminum foam has better energy absorption properties to be applied as vehicle components such as crash boxes. Al-Mg-Si alloy casting with 60% NaCl space holder conducted to produce an open-cell aluminum foam structure. The casting of Al-Mg-Si alloy and NaCl preheat conducted at a temperature of 750°C. NaCl is then removed from the casting product by leaching and the casting product is then cut into specimen size for further heat treatment. Heat treatment was carried out in the form of solution treatment at 530°C for 100 minutes, followed by air quenching, and artificial aging for 7 hours with temperature variations of 150°C, 165°C, and 180°C. The heat-treated aluminum foam examined for its physical and mechanical characteristics through density and porosity testing, XRD testing, stereo microscope testing, SEM testing, hardness testing, compression testing, and impact testing. The test results show that density and average porosity of aluminum foam is 1.503 g/cm3 and 51.272%. The average pore size produced is 4.086 mm correspond to the size of NaCl used. The heat treatment given affects the XRD results and microstructure. The results of the XRD test showed that there was a shift in the highest alpha-aluminum peak. These shift of α-aluminum peak indicate the presence of precipitates. In addition, the increase of FWHM and lattice constant indicate an increase in mechanical properties. The microstructure of aluminum foam from SEM-EDX shows tiny black spots spread in the α-aluminum matrix. The difference occured between SEM-EDX results was found in the weight percentage of Mg2Si in each specimen. Increasing the weight percentage of Mg2Si affects the mechanical properties of aluminum foam. The AT 180 specimen has a Vickers hardness of 91.7 VHN, compressive strength of 87.790 MPa, and energy absorption of 21.885 MJ/m3. The mechanical characteristics produced by the AT 180 specimen are the highest compared to the Non-HT, AT 150, and AT 165. The AT 180 specimen also has an impact energy of 1.336 J and impact strength of 16.701 kJ/m2. Heat treatment with variations in aging temperature increase from 150°C to 180°C can improve the mechanical characteristics of aluminum foam so that it has the potential to be applied as a crash box filler.

Item Type:	Thesis (Other)
Additional Information:	RSMt 669.722 Mau p-1 2022
Uncontrolled Keywords:	Aluminium Foam, Karakteristik Fisik, Karakteristik Mekanik, Mg2Si, Temperatur Aging. Aging Temperature, Aluminum Foam, Mechanical Characteristics, Mg2Si, Physical Characteristics.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	18 May 2026 01:32
Last Modified:	18 May 2026 01:32
URI:	http://repository.its.ac.id/id/eprint/133199

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