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Hasil Pencarian

Ditemukan 2 dokumen yang sesuai dengan query
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Raka Nuralif Verdiyanto
Pengaruh penambahan penghalus butir Al-5Ti-1B terhadap karakteristik komposit aluminium A356 berpenguat mikro Al2O3 melalui metode pengecoran aduk = Effect of grain refiner Al-5Ti-1B addition on characteristics of composite aluminum A356 reinforced micro Al2O3 by stir casting method
Abstrak :
ABSTRAK
Berkembangnya kereta api sebagai moda transportasi massal yang murah dan cepat bukan berarti tidak meninggalkan masalah. Salah satu masalah yakni pada sistem pengereman yang kurang efektif dan efisien. Saat ini, blok rem kereta api menggunakan material besi tuang yang memiliki berat 11-12 kg dan umur pemakaian hanya mencapai satu bulan sehingga menyebabkan biaya operasional tinggi. Penelitian ini bertujuan membuat material alternatif blok rem kereta api berupa komposit Aluminium A356 berpenguat mikro Al2O3 dengan penambahan variasi penghalus butir TiB sebesar 0; 0,01; 0,0347; 0,0362; 0,0622; dan 0,0689 wt dengan penambahan 2 wt magnesium sebagai agen pembasahan menggunakan metode pengecoran aduk. Karakterisasi hasil pengecoran menggunakan pengujian tarik, keras, aus, impak, densitas, porositas, komposisi kimia OES dan XRD , mikrostruktur OM, SEM, dan EDX . Hasil pengujian menunjukkan penambahan TiB sebesar 0,0347 wt mampu mereduksi ukuran dan mengubah bentuk SDAS dari panjang dan kasar menjadi bulat dan halus sehingga meningkatkan kekuatan tarik, kekerasan, dan ketahanan aus secara signifikan, namun menurunkan elongasi dan harga impak.
ABSTRACT The development of train as a mode of mass transportation which are cheap and quick does not mean with no problem. One of the problems is the braking system is less effective and efficient. Nowadays, brake blocks train using cast iron material that weight up to 11 12 kg and life time only reached one month which causing high operating costs. This study aims to create an alternative material for brake blocks train in the form of Aluminium A356 reinforced micro Al2O3 composite material with the addition of grain refiner TiB of 0 0.01 0.0347 0.0362 0.0622 and 0.0689 wt with the addition of 2 wt magnesium as a wetting agent using stir casting method. Material characterization consisted of tensile testing, hardness testing, wear testing, impact testing, density and porosity testing, chemical composition testing OES and XRD , and microstructure testing OM, SEM and EDX . The test results showed that the addition of 0.0347 wt TiB capable of reducing the size and changing the shape of a long and coarse SDAS become round and fine that increasing tensile strength, hardness, and wear resistance significantly, but decreasing elongation and impact strength.
Depok: Fakultas Teknik Universitas Indonesia, 2017
S66706
UI - Skripsi Membership  Universitas Indonesia Library
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Donanta Dhaneswara
The mechanical properties of al2o3-reinforced aluminum a356 with grain refiner al-5ti-1b fabricated using the stir casting method
Abstrak :
Al2O3 reinforced aluminum A356 has been successfully fabricated using the stir casting method. The development of current technology requires a material that is light, strong, tough, and corrosion and wear resistant, in addition to various other advanced properties. A composite material was therefore developed. Composite materials can be used in a wide range of strategic sectors such as the automotive, military, aerospace, and electrical industries. This study aims to develop a composite material that consists of aluminum A356 as the matrix and micro Al2O3 as the reinforcement, with 8 wt% magnesium as the wetting agent with the addition of grain refiner TiB at 0; 0.01; 0.0347; 0.0362; 0.0622; and 0.0689 wt% using the stir casting method. The material characterization comprises tensile testing, hardness testing, wear testing, chemical composition testing (OES and XRD), and microstructure testing (OM, SEM, and EDX). The test results revealed that the addition of 0.0347 wt% TiB was capable of reducing the size and changing the shape of a long and coarse grain to become round and fine, thereby significantly increasing its tensile strength, hardness, and wear resistance, but decreasing the elongation and ductility.
Depok: Faculty of Engineering, Universitas Indonesia, 2017
UI-IJTECH 8:8 (2017)
Artikel Jurnal  Universitas Indonesia Library