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All Journal Warta Pengabdian EPI International Journal of Engineering
Muhammad Syahid
Departmen Mechanical Engineering, Faculty Of Engineering, Hasanuddin University, Makassar, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering

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The Corrosion Erossion of Ship Propeller Al 7075 Produced by Gravity Sand Casting Milka Rante; Muhammad Syahid; Onny Sutresman
EPI International Journal of Engineering Vol 2 No 2 (2019): Volume 2 Number 2, August 2019 with Special Issue on Natural Disaster and Mitigat
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.082019.13

Abstract

Propeller is one of the important components of ships and boats that function as motor or boat propulsion. The mechanical properties required in propeller material are high toughness, easy to cast, and good engine capability, as well as good resistance to corrosion and erosion. One of the aluminum alloys that have been widely used in major vessels in propeller systems is the Nickel-aluminum-bronze (NAB) alloy because it has an excellent combination of mechanical properties and corrosion-erosion resistance. Another type of aluminum alloy that is widely used as a machining component is the Al 7075 T651 because it has the highest strength among other aluminum alloys. The mechanical properties of the Al 7075 T651 are directly proportional to the erosion resistance of the propeller which agrees with the pot tester porridge. The higher the value of the erosion propeller failure that occurs also increases with increasing testing rotational speed. For corrosion, a propeller with air testing media at a speed of 1000 rpm which results in significant corrosion products. Keywords: Al 7075 T651, Slurry Pot Tester, Corrosion Erosion
Calculation and Simulation of Aluminium Alloy Flange Reducer Cast Using Resin Sand Mold Andi Ari Putra; Muhammad Syahid; Andi Amijoyo Mochtar
EPI International Journal of Engineering Vol 4 No 2 (2021): Volume 4 Number 2, August 2021
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.082021.01

Abstract

One of the causes of defects in casting is due to poor gating system design. In conventional casting methods, the gating system design process is carried out by trial and error to find the best design results. Computer modeling and simulation offer process design in a much faster time, and at much less cost, compared to conventional methods. The gating system design approach with a combination of well calibrated simulation software can avoid defect before casting. Casting simulation helps to visualize the phenomena of filling, molten metal solidification, and shrinkage porosity. The resulting casting simulation can be displayed in graph variants at specific nodes with line graphs or numerical numbers manually. This study discusses the simulation of casting a flange reducer from aluminum alloy material using a resin sand mold. The initial dimensions of the gating system used are sprue of 14.5 x 8.4 x 180 mm, runner 147 x 10 x 5.5 mm, ingate 80 x 10 x 5.5 mm with a bottom gate channel system. Total of dominant porosity that occurs using the initial gating system is 65.31 % and show the undirectional solidificiation behavior. After modifying the gating system and increasing the riser size, the simulation results show directional solidification behavior starting from the thinnest part to the thickest part and ending at the riser. The shrinkage porosity can compensate with the total of porosity is 57.60 % at the riser . Modification of the channel system is required to obtain a sound casting or porosity free.
Pengelolaan Sampah Terpadu Pulau Kodingareng Lompo Melalui Program Kuliah Kerja Nyata Pembelajaran Dan Pemberdayaan Masyarakat Muhammad Syahid
Warta Pengabdian Vol 12 No 3 (2018): Warta Pengabdian
Publisher : LP2M Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/wrtp.v12i3.8769

Abstract

Pulau kodingareng lompo dengan jumlah penduduk 4170 jiwa belum memiliki sistem pengelolaan sampah yang baik, sehingga sampah masih banyak yang dibuang kelaut. Sampah masih dibiarkan tertimbun dibelakang rumah warga di pinggir pantai, baik sampah organic maupun anorganik. Kesadaran warga akan pentingnya kebersihan dan kesehatan masih rendah, masih ada sebagian warga yang tidak memiliki WC dan membuang air besar dilaut. Padahal Pulau ini memiliki pasir putih yang cantik sehingga berpotensi untuk menjadi destinasi wisata. Tujuan dari Program KKN PPM Dikti yang dilaksanakan pada tanggal 4 juli -4 Agustus 2018 di Pulau Kodingareng Lompo adalah untuk meningkatkan kesadaran warga untuk tidak membuang sampah dilaut, memiliki kesadaran pola hidup sehat dan bersih dan mampu mengelola sampahnya baik sampah organic dan non organic. Program ini terdiri dari tiga garis besar kegiatan yaitu pemilahan dan pengolahan sampah, pembangunan incinerator ramah lingkungan dan penyuluhan hidup bersih dan sehat. Pengolahan sampah secara terpadu meliputi pemilahan dari rumah tangga antara sampah organik dan non organik, pembuatan kompos untuk sampah organic, daur ulang sampah non organik yang masih bisa dimanfaatkan dan pembakaran sampah dengan menggunakan incinerator ramah lingkungan. Solusi Incenerator ramah lingkungan dibutuhkan karena sulitnya membawa sampah yang ada dipulau ke tempat pembuangan akhir sampah kota Makassar. Penyuluhan Hidup sehat dan Bersih diberikan langsung ke setiap rumah tangga dan anak-anak sekolah.. Setelah program berakhir terlihat ada perubahan pola pikir dan perilaku dari warga. Kata Kunci: Manajemen Sampah, Incinerator ramah lingkungan, Pulau Kodingareng
Co-Authors Andi Amijoyo Mochtar Andi Ari Putra Onny Sutresman Rante, Milka