Studi Eksperimental Pengaruh Penambahan Fraksi Volume Aj203 Pada Aluminium Terhadap Nilai Kekerasan Dan Nilai Laju Keausan Pada Aluminium Matrix Composite

Arief, Krisna Bilal (2015) Studi Eksperimental Pengaruh Penambahan Fraksi Volume Aj203 Pada Aluminium Terhadap Nilai Kekerasan Dan Nilai Laju Keausan Pada Aluminium Matrix Composite. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Perkembangan zaman yang cepat sangat membutuhkan material baru yang memiliki sifat-sifat unggul. Material yang digunakan pun diharuskan memiliki ketentuan tertentu untuk memenuhi kebutuhan. Dengan berkembangnya ilmu pengetahuan dan teknologi seperti di bidang komposit dapat menjadi alternatif untuk permasalahan yang timbul dan dapat memenuhi karakteristik dan sifat mekanik tertentu sesuai yang diinginkan. Dalam studi ini, Aluminium dicairkan hingga suhu 900oC dalam furnace. Alumina sebagai penguat ditambahkan saat aluminium dalam keadaan cair, kemudian diaduk selama 10 menit dengan putaran 300 rpm. Aluminium matrix composite dibuat dengan metode stir casting. Pengujian yang dilakukan adalah pengujian kekerasan, keausan dan struktur mikro. Hasil yang didapatkan adalah nilai kekerasan meningkat hingga 20 % dan menurun pada 25 % volume fraksi alumina. Peningkatan nilai kekerasan disebabkan penyisipan partikel alumina didalam matriks aluminium sedangkan penurunan nilai kekerasan diakibatkan lubang bekas melekatnya alumina yang mempermudah dislokasi. Nilai laju keausan menurun hingga kadar 20% dan meningkat pada kadar 25% volume fraksi alumina. Penurunan nilai laju keausan disebabkan ikatan interface yang terbentuk antara matriks dan penguat. peningkatan nilai laju keausan disebabkan partikel alumina terlepas dari matriks aluminium. =================================================================================================== Rapid development period needs of new materials preeminent. The materials used are required to have specific provisions to met the needs. The development of science and technology in composites could be an alternative for the problems that occured, can meet the characteristics and mechanical properties as desired. In this study, Aluminum melted in the furnace to a temperature of 900°C. Alumina as an reinforcement is added when the aluminum in the liquid state, and then stirred for 10 minutes at 300 rpm rotation. Aluminum matrix composites prepared by stir casting method. This experiment is for micro structure, hardness test and wear test. The result is the hardness value increased by 20% and decreased at 25% volume fraction of alumina. The increasing of hardness value due to the insertion of alumina particles in an aluminum matrix, while decreasing the hardness value is caused by holes that ease dislocation. Value wear rate decreased to levels of 20% and increased the levels of 25% volume fraction of alumina. Decreasing specific wear rate caused the interface bonding formed between matrix and reinforcement. Increasing in value is due to the wear rate of alumina particles in spite of the aluminium matrix.

Item Type: Thesis (Undergraduate)
Additional Information: RSM 620.118 Ari s
Uncontrolled Keywords: Aluminium Matrix Composite, Al2O3, Stir Casting, Struktur Mikro, Kekerasan, Keausan ========================================================================================= Aluminium Matrix Composite, Al2O3, Stir Casting, Micro Structure, Hardness, Specific Wear Rate
Subjects: T Technology > TL Motor vehicles. Aeronautics. Astronautics
T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL240.5 Composite materials
Divisions: Faculty of Industrial Technology > Mechanical Engineering > (S1) Undergraduate Theses
Depositing User: - Taufiq Rahmanu
Date Deposited: 30 Aug 2018 02:57
Last Modified: 30 Aug 2018 02:57
URI: http://repository.its.ac.id/id/eprint/59529

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