Syahputra, Hendy Gilang (2023) Analisis Karakteristik Fisik dan Mekanik Paduan Al-Mg-Si Foam Menggunakan Space Holder NaCl Dengan Variasi Holding Time dan Temperatur Pada Artificial Aging. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Metal foam dipilih dalam aplikasinya sebagai filler pada crash box menggunakan metode space holder dengan memanfaatkan NaCl. Karakteristik produk dapat ditingkatkan melalui perlakuan panas. Aluminium paduan Al-Mg-Si dengan seri 6061 merupakan jenis aluminium yang dapat ditingkatkan kemampuannya melalui perlakuan panas precipitation hardening yang menghasilkan presipitasi, yaitu Mg2Si. Penelitian ini bertujuan menganalisis pengaruh temperatur dan holding time pada artificial aging paduan Al-Mg-Si foam sebagai filler pada crash box. Paduan Al-Mg-Si digunakan sebagai bahan utama dan NaCl yang berukuran 3-4 mm sebanyak 60% dari volume digunakan sebagai agen pembentuk foam. Proses pengecoran dilakukan dengan pelelehan aluminium pada temperatur 750 °C menggunakan metode infiltration casting. Leaching menggunakan air bertemperatur 90 °C untuk melarutkan NaCl. Solution heat treatment dijalankan pada temperatur 530 °C selama 40 menit. Quenching dilakukan sebagai proses pendinginan cepat dengan media udara. Perlakuan panas artificial aging dilakukan pada variasi variasi temperatur 180 °C dan 200 °C dengan variasi holding time selama 8 jam, 16 jam, dan 24 jam. Spesimen dilakukan pengujian densitas dan porositas, pengamatan mikroskop stereo, SEM-EDX, XRD, kekerasan, dan uji kompresi sebagai data dalam menganalisis pengaruh dari perlakuan panas yang diberikan terhadap karakter fisik dan mekanik dari aluminium foam. Dihasilkan densitas dan porositas berturut-turut bernilai 1,040 g/cm3 dan 61,496%. Rentang lebar porositas 2,27-3,6 mm. Terdapatnya bintik-bintik hitam pada sampel dengan perlakuan panas sebagai presipitat Mg2Si. Semua sampel dengan perlakuan panas memiliki nilai yang lebih tinggi daripada sampel Non-HT akibat presipitasi yang dihasilkan. Pada penelitian ini diketahui bahwa tren nilai kekerasan berbanding terbalik dengan tren nilai kompresi.
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Metal foam was chosen for its application as a filler in crash boxes using the space holder method using NaCl. Product characteristics can be improved through heat treatment. The Al-Mg-Si aluminum alloy with the 6061 series is a type of aluminum whose ability can be increased through precipitation hardening heat treatment which results in precipitation, namely Mg2Si. This study aims to analyze the effect of temperature and holding time on artificial aging of Al-Mg-Si foam as filler in crash box. Al-Mg-Si alloy was used as the main ingredient and NaCl measuring 3-4 mm as much as 60% of the volume was used as a foaming agent. The casting process is carried out by melting aluminum at a temperature of 750 °C using the infiltration casting method. Leaching uses water at 90 °C to dissolve NaCl. Solution heat treatment was run at 530 °C for 40 minutes. Quenching is carried out as a rapid cooling process with air as the medium. Artificial aging heat treatment was carried out at various temperature variations of 180 °C and 200 °C with variations of holding time for 8 hours, 16 hours, and 24 hours. Specimens were tested for density and porosity, stereomicroscope observations, SEM-EDX, XRD, hardness, and compression tests as data in analyzing the effect of heat treatment given to the physical and mechanical characteristics of aluminum foam. The resulting density and porosity are 1.040 g/cm3 and 61.496%, respectively. Porosity width range 2.27-3.6 mm. There are black spots on the sample with heat treatment as Mg2Si precipitate. All samples with heat treatment had higher values than non-HT samples due to the resulting precipitation. In this study it is known that the trend of hardness values is inversely proportional to the trend of compression values.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSMt 620.11 Sya a-1 2023 |
| Uncontrolled Keywords: | Aluminium Foam, Artifical Aging, Paduan Al-Mg-Si, Precipitation Hardening, Presipitat Mg2Si Al-Mg-Si Alloy, Aluminium foam, Artifical Aging, Mg2Si Precipitate, Precipitation Hardening |
| Subjects: | T Technology > TN Mining engineering. Metallurgy > TN775 Aluminum alloys--Metallurgy. |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis |
| Depositing User: | Hendy Gilang Syahputra |
| Date Deposited: | 13 Feb 2023 07:28 |
| Last Modified: | 28 Aug 2023 04:55 |
| URI: | http://repository.its.ac.id/id/eprint/96878 |
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