Analisis Pengaruh Komposisi Ca dan Temperatur Artificial Aging terhadap Sifat Fisik dan Mekanik Paduan Al-Mg-Si Foam Menggunakan Foaming Agent CaCO3

Prasetyo, Vicentius Felix Dwi (2023) Analisis Pengaruh Komposisi Ca dan Temperatur Artificial Aging terhadap Sifat Fisik dan Mekanik Paduan Al-Mg-Si Foam Menggunakan Foaming Agent CaCO3. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Crash box merupakan sistem keamanan pasif pada mobil untuk menyerap energi kinetik ketika terjadi benturan dari depan maupun belakang sehingga dapat mengurangi energi tabrakan yang mengalir ke body mobil. Aluminium foam dengan struktur closed-cell merupakan salah satu alternatif material pengisi crash box. Aluminium foam tersebut bisa diproduksi dengan metode foaming agent. Dalam penelitian ini, aluminium foam diproduksi menggunakan metode foaming agent CaCO3 dan stabilizer kalsium dengan variasi komposisi 0,5%, 1%, dan 1,5%. Selanjutnya aluminium foam tersebut akan diberikan perlakuan panas meliputi solution treatment pada 530°C selama 100 menit , quenching udara, dan artificial aging dengan variasi temperatur artificial aging pada temperatur 180°C, 200°C, dan 220°C yang ditahan selama 8 jam. Setelah melakukan proses perlakuan panas, maka aluminium foam yang terbentuk dilakukan pengujian dengan mikroskop stereo, pengujian X-Ray Diffraction, pengujian kompresi, pengujian densitas, dan pengujian SEM-EDX, untuk mengidentifikasi pengaruh variasi komposisi stabilizer Ca dan temperatur artificial aging terhadap sifat fisik dan mekanik. Pada hasil XRD, terlihat tidak ada peak dari fasa β – Mg2Si karena intensitas puncak Mg2Si terlihat lebih kecil daripada intensitas puncak Al karena fraksi volume dari fasa Mg2Si yang lebih rendah dibandingkan dengan fasa Al. Spesimen aluminium foam dengan penambahan stabilizer Ca sebesar 1,5% memiliki nilai densitas paling rendah sebesar 0,69 gr/cm3 dan nilai porositas sebesar 74%. Sementara itu, nilai absorpsi dan nilai kekuatan kompresi dimiliki oleh spesimen 22SA1 (artificial aging pada temperatur 220°C dan penambahan Ca sebesar 0,5% sebesar 12,44 MPa dan 3,126 MJ/m3. Pada hasil pengujian SEM-EDX, munculnya bintikbintik hitam pada spesimen dengan perlakuan panas sebagai presipitat Mg2Si.
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The crash box is a passive safety system for cars to absorb kinetic energy when a collision occurs from the front or rear so as to reduce the collision energy flowing into the car body. Aluminum foam with a closed-cell structure is an alternative crash box filling material. Aluminum foam can be produced using the foaming agent method. In this study, aluminum foam was produced using the CaCO3 foaming agent method and calcium stabilizer with variations in composition of 0.5%, 1% and 1.5%. Furthermore, the aluminum foam will be given heat treatment including solution treatment at 530°C for 100 minutes, air quenching, and artificial aging with artificial aging temperature variations at temperatures of 180°C, 200°C, and 220°C which are held for 8 hours. After carrying out the heat treatment process, the formed aluminum foam was tested with a stereo microscope, X-Ray Diffraction testing, compression testing, density testing, and SEM-EDX testing, to identify the effect of Ca stabilizer composition variations and artificial aging temperature on physical and mechanical properties. In the XRD results, it appears that there are no peaks from the β – Mg2Si phase because the peak intensity of Mg2Si looks smaller than the intensity of the Al peak because the volume fraction of the Mg2Si phase is lower than that of the Al phase. Aluminum foam specimens with the addition of 1.5% Ca stabilizer had the lowest density value of 0.69 gr/cm3 and a porosity value of 74%. Meanwhile, the absorption value and compression strength value were owned by the 22SA1 specimen (artificial aging at 220°C and the addition of 0.5% Ca was 12.44 MPa and 3.126 MJ/m3. In the SEM-EDX test results, black spots appeared on the specimen by heat treatment as Mg2Si precipitate.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Aluminium Foam, Kalsium , Kalsium Karbonat, Precipitation Hardening, Aluminum Foam, Calcium, Calcium Carbonate, Precipitaton Hardening
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN775 Aluminum alloys--Metallurgy. T Technology > TS Manufactures T Technology > TS Manufactures > TS205 Metals--Heat treatment.
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Vicentius Felix Dwi Prasetyo
Date Deposited:	27 Jul 2023 07:18
Last Modified:	27 Jul 2023 07:18
URI:	http://repository.its.ac.id/id/eprint/99530

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