Pengaruh Variasi Holding Time Solution Treatment Terhadap Karakteristik Foam Paduan Al-Mg-Si Dengan Foaming Agent CaCO3 Dan Stabilizer Al2O3

Gianto, Hanggoro Putra Pramudya (2022) Pengaruh Variasi Holding Time Solution Treatment Terhadap Karakteristik Foam Paduan Al-Mg-Si Dengan Foaming Agent CaCO3 Dan Stabilizer Al2O3. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Aluminium foam adalah suatu jenis produk aluminium yang memiliki struktur berpori dengan porperti seperti densitas rendah, kekuatan tekan yang tinggi, kemampuan penyerapan energi yang tinggi, dan memiliki massa yang ringan. Aluminium foam memiliki proses pembuatan seperti gas injection, foaming agent melt route, dan metalurgi serbuk. Proses pembuatan yang dilakukan pada penelitian ini menggunakan metode stir-casting dengan CaCO3 sebagai foaming agent dan Al2O3 sebagai stabilizer. Penelitian ini dilakukan dengan variasi holding time solution treatment untuk meningkatkan sifat mekanik dan karakteristiknya. Aluminium foam dibuat menggunakan logam dasar paduan Al-Mg-Si, 1% CaCO3, 5% Al2O3, dengan variasi solution treatment pada temperatur 530°C selama 50 menit, 75 menit, dan 100 menit. Produk kemudian dilakukan pengujian XRD, pengujian impak, pengujian kompresi, dan pengujian densitas dan porositas, pengujian SEM-EDX, dan pengujian stereo. Aluminium foam yang dihasilkan memiliki karakteristik fisik berupa densitas sebesar 0,797-0,823 g/cm3 dengan porositas sebesar 69,506-70,568 % dengan struktur closed-cell berbentuk pori bulat. Pengujian SEM-EDX menunjukkan struktur mikro spesimen dengan perlakuan panas memiliki karakteristik yang semakin halus dengan naiknya waktu holding perlakuan panas solution treatment. Didapatkan juga kadar Mg2Si sebesar 0,819-1,556 wt%. Hasil dari pengujian XRD didapatkan adanya senyawa Mg2Si setelah dilakukan heat treatment, dan ditemukan kenaikan ukuran kristal aluminium sebesar 41,913-71,841 mm yang menandakan terjadinya perlakuan panas solution treatment. Sifat mekanik yang didapat memiliki kecenderungan naik seiring dengan bertambahnya waktu holding time solution treatment dengan spesimen SHT50 memiliki sifat mekanik paling rendah dengan nilai energi impak sebesar 0,344 J dan kekuatan impak sebesar 4,295 KJ/m2 dengan plateau stress dan plateau end stress berturut-turut sebesar 50,435 MPa dan 65,565 MPa dengan penyerapan energi sebesar 12,871 MJ/m3 sedangkan spesimen SHT100 memiliki sifat mekanik tertinggi dengan nilai untuk energi impak sebesar 0,420 J dengan kekuatan impak sebesar 5,250 KJ/m2 dengan plateau stress dan plateau end stress berturut-turut sebesar 90,796 MPa dan 118,034 MPa dengan penyerapan energi sebesar 19,519 MJ/m3
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Aluminium foam is a kind of aluminium product which has a porous structure with properties such as low density, high compressive strength, high energy absorption, and low mass. Aluminium foam has production method such as gas injection, foaming agent melt route, and powder metallurgy. Production method which is conducted in this research is foaming agent melt route with CaCO3 as foaming agent and Al2O3 as stabilizer. This research was done with the solution treatment holding time variation to increase the characteristics and mechanical properties. Aluminium foam is made using Al-Mg-Si as it’s base alloy with 1% CaCO3, 5% Al2O3, and variation of solution treatment at 530°C for 50 minutes, 75 minutes, and 100 minutes. The product is then tested with composition test using OES, XRD test, impact test, compression test, density test, microscope stereo test, SEM-EDX test and porosity test. Aluminium foam that are produced has physical characteristics in the form of density of 0,797-0,823 g/cm3 with porosity of 69,506-70,568 % with closed cell structures and spherical phorous shape. SEM- EDX testing shows that the microstructure of the specimen has the characteristics of which it gets smoother with increasing solution treatment time. Mg2Si content were also obtained at 0.819-1,556 wt%. XRD test results in Mg2Si being present after heat treatment, and crystal size of aluminium are also calculated with size of 41,913-71,841 mm which indicates that heat treatment of solution treatment happens. The mechanical properties of the aluminium foams are increasing along with the increase of solution treatment holding time with SHT50 specimen having the lowest mechanical properties with with impact energy of 0,344 J and impact strength of 4,295 KJ/m2 with plateau stress and plateau end stress of 50,435 MPa and 65,565 MPa repetitively with energy absorption of 12,871 MJ/m3. SHT100 specimen having the highest mechanical properties with impact energy of 0,420 J and impact strength of 5,250 KJ/m2 with plateau stress and plateau end stress of 90,796 MPa and 118,034 MPa repetitively with energy absorption of 19,519 MJ/m3
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Item Type:	Thesis (Other)
Additional Information:	RSMt 671.36 Gia p-1 2022
Uncontrolled Keywords:	Al-Mg-Si, CaCO3, foam, holding time, precipitation hardening, solution treatment
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	11 Feb 2025 05:47
Last Modified:	11 Feb 2025 05:47
URI:	http://repository.its.ac.id/id/eprint/118640

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