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Jurnal Rekayasa Material, Manufaktur & Energi
Published by Universitas Muhammadiyah Sumatera Utara
ISSN : 26227398     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Aerospace Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering
Jurnal Rekayasa Material, Manufaktur & Energi, yang diterbitkan oleh Fakultas Teknik, Program Studi Teknik Mesin, Universitas Muhammadiyah Sumatera Utara (UMSU), Medan, Sumatera Utara, Indonesia, Jurnal Rekayasa Material, Manufaktur & Energi menerima artikel ilmiah hasil-hasil penelitian, dan eksperimen, yang mencakup pada bidang Rekayasa Material, Manufaktur dan Energi, Mesin, dan ilmu yang relevan pada sektor terkait.
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Articles 21 Documents
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Search results for , issue "Vol 7, No 2: Juli 2024" : 21 Documents clear
Analysis the Effect of Different Surface Preparation Methods on Corrosion Resistance of ASTM-A36 Steel Santoso, Irwan Wijaya; Aqila, Daffa; Riastuti, Rini; Ramadhani, Rizal Tresna
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.18884

Abstract

 In the industrial world, to extend the service life of materials, protection methods are carried out to slow down the material's corrosion rate. The protection method that is often used is the coating method. The coating method is a protection method by coating the substrate material using a coating material to prevent contact between the substrate material and the environment. In this research, the substrate material used is ASTM A36 steel and the coating material used is Surface Tolerant Epoxy paint. The independent variable used in this study lies in the surface preparation method which consists of: solvent cleaning, hand tool cleaning, power tool cleaning, power tool to bare metal cleaning, and abrasive blast cleaning. Different preparation methods result in different roughness and cleanliness of the surface. This can affect changes in the mechanical properties of the coating material, such as corrosion resistance and adhesion strength. Based on the corrosion resistance test, it is found that the  abrasive blast cleaning and power tool to bare metal cleaning methods produce the highest corrosion resistance properties because both have a rating number of 8 in the salt spray test results. Based on the adhesion strength test, it is found that the abrasive blast cleaning method also produces the highest adhesion strength. This conclusion refers to the results of the tape x-cut test where the sample produces a rating number 5A where the sample does not experience peeling after testing. In addition, the abrasive blast cleaning method produced the highest adhesion strength in the pull-off test, which was 7.16 Mpa. Thus, the abrasive blast cleaning method is the most effective surface preparation method for ASTM A36 steel before being coated with the coating material. In addition, it can also be concluded that the higher the surface roughness of the sample, the better the corrosion resistance and adhesion strength.
Literatur Review: Performa Baterai Lithium-ion, Lithium-sulfur, dan Lithium-air sebagai Penggerak UAV Spionase Pertahanan dan Keamanan ., Mohtar; Aritonang, Sovian
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.19536

Abstract

Currently, the development of science and technology is developing very quickly. One technology that is currently developing rapidly is unmanned aerial vehicles (UAV). This technology is believed to be a new breakthrough in the modern era because it minimizes human involvement in its operation. This increases effectiveness and reduces risk management in the operational field. Especially in the vast territory of the Unitary State of the Republic of Indonesia with diverse natural landscapes, UAV are considered very helpful as a means of defense and security equipment (alpahankam) in espionage. With these geographical conditions, to carry out its mission, a UAV requires a battery as the driving force. However, in general, the most widely used battery is the lithium-ion (Li-ion) type. It is known that there are several problems with Li-ion batteries, including not being able to withstand heat, being prone to exploding, and if the battery has a large capacity, the size of the battery must be large. Considering this situation, a study is needed to examine several alternative types of batteries, namely: lithium-air (Li-air) and lithium-sulfur (Li-S) batteries. This article aims to compare the performance of lithium-air batteries, and lithium-sulfur batteries which can later replace the use of lithium-ion batteries which are currently widely used in UAVs. The method used in writing this article is Systematic Literature Review (SLR) by searching, collecting and evaluating several sources related to the research object. From a comparison of the three batteries, Li-S batteries offer a large specific energy compared to Li-air and Li-ion batteries. Li-S batteries are currently receiving more attention so they are expected to move towards mass use more quickly. The results of this literature are that Li-S batteries have an energy density of 2,500Wh/kg and have exceeded the energy density of Li-ion batteries of 890Wh/kg and Li-air batteries of 250-1,200Wh/kg. Energy density determines how much energy can be accommodated in a cell of the same size. Thus, it is hoped that Li-S batteries will be a solution to problems with UAV batteries.
Variasi Media Pendingin Proses Pengecoran Terhadap Kekuatan Material Dan Struktur Mikro Pada Pengecoran Aluminium ADC12 Ningsih, Pita Dwi Rahayu; Umar, Mega Lazuardi; W.W, Prabuditya Bhisma; Hanafi, Agung Fauzi; P.U, Rochmad Eko
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.20246

Abstract

Metal casting can influence the mechanical properties and materials’s microstructure such as aluminum. The mechanical properties, strength, and microstructural form are affected by the solidification process during casting. These changes occur due to the cooling media used in the solidification process. The mechanical properties of metals, especially material strength, are crucial in today's manufacturing industry. This research investigates various cooling media in the casting process, including air, radiator coolant, and oil. Tensile tests and microstructural analysis were conducted to determine the mechanical properties and grain structure of the castings. The tensile testing showed that the highest tensile strength was achieved with radiator coolant at 146.305 MPa, followed by oil at 141.297 MPa, and the lowest with air at 131.431 MPa. Microstructural analysis revealed that the finest grains were obtained with oil cooling, while the largest grains were observed with air cooling.
Assessing The Mechanical Properties And Performance Of Biocomposite And Natural Fiber Based Bulletproof Vests Nabilla, Dhawya Najma; Aritonang, Sovian; Muniarti, Riri
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.17339

Abstract

Within the munitions industry, there has been a notable emphasis on the development of cost-effective, easily wearable, and biocompatible flak armor. The rising popularity of fiber-reinforced polymer biocomposite technology, particularly employing natural fibers, stems from its eco-friendliness and cost-effectiveness, which holds particular significance in today's defense sector. As firearm technology advances rapidly, it necessitates a concurrent focus on enhancing personal protective equipment, with bulletproof vests being a commonly utilized safeguard. These vests play a critical role in mitigating the impact of ballistic threats on individuals. This study is dedicated to the investigation of natural fiber biocomposite materials for their applicability in bulletproof vests, addressing their mechanical properties and suitability for such a vital protective role.
Karakteristik Arang Kulit Durian Dan Daun Jenggelan Untuk Pembuatan Tinta Organik Ramadhani, Devi Rezky; ., Masthura; Husnah, Miftahul
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.18962

Abstract

Printing inks contain dyes, adhesives, lubricants, plastics, surfactants and other substances. Chemical-based inks have carcinogenic, toxic, and corrosive properties that cause breathing difficulties and dizziness in humans when the substance is vaporized and inhaled, disorders of the brain, liver, and nervous system if inhaled for a long time. So an organic ink innovation is needed. This study aims (i) to determine whether durian peel charcoal and janggelan leaves can be used as a basic material for making organic ink. (ii) To determine the characteristics of organic ink made from durian skin and janggelan leaves. (iii) To determine the optimum composition of durian skin charcoal and janggelan leaves. The tests carried out are density, viscosity, surface tension and Fourier Transform Infrared (FTIR). The results obtained show that the organic ink that can be used is with a sample composition of 5 grams of durian skin charcoal, 1.5 grams of janggelan leaf extract, 96% alcohol 15 ml and distilled water 20 ml. With ink density value of 0.92 gr/cm3, viscosity value of 3.88 Cp, surface tension value of 45.802 dyne/cm. The functional groups of organic ink that have been studied are OH, CO, C=O, C ≅ C.
Pemanfaatan Limbah Biomassa Sebagai Plastik Biodegradable Yang Diaplikasikan Pada Food Packaging Ransum Tni Aritonang, Sovian; Rhomadon, Fajar Ismail; Hapsari Subiakto, Amadea Kenyoning; Nismarawati, Ardine Kusuma
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.18455

Abstract

The use of conventional plastic in the manufacture of Indonesian National Army (TNI) ration packaging has become an unavoidable standard because it provides strength, resilience and durability which is very important for protecting food and other materials. However, the use of conventional plastic in making ration packaging has become an increasingly pressing problem, especially regarding environmental sustainability. To overcome this problem, conventional plastic must be replaced with environmentally friendly plastic (biodegradable plastic). The method used is a literature review by comparing the Indonesian National Standards with literature from various journals. The results of literature research show that there is no biodegradable plastic that meets SNI 7818:2014. The mechanical properties and biodegradability of biodegradable plastics are influenced by the concentration of additives such as plasticizers and fillers, such as glycerol and chitosan.
Analisis Lapisan Aluminium Pada Permukaan Baja Dengan Metode Twin-Wire Arc Spray Terhadap Laju Korosi Fahrezi, Wibi Adrian; ., Nurhadi; Hastuti, Sri; Pramono, Catur; Nurdin, Akhmad; Wibowo, Rheza Ari; Al Hassany, Ibnu Rosyid; Pandupradityo, Bramono
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.19691

Abstract

Electrical twin-wire arc spray is often used as protection from material components. The coating process aims to protect the coating from environmental disturbances. The quality of the coating yield is indicated by corrosion resistance. The spraying distance in the thermal spray process will affect the corrosion rate, morphological structure, and thickness. The purpose of this study is to analyze the effect of distance variations in the electrical twin-wire arc spray process with an aluminum coating on corrosion rate, morphological structure, and layer thickness in AISI 1020 steel. Tests are carried out for corrosion tests, scanning electron microscope (SEM), and layer thickness. The implementation of the study used experimental methods using distance variations of 150 mm, 250 mm, and 350 mm. The results of the study of the lowest corrosion rate value at a distance of 150 mm are included in the good category with a value of 0.13667 mmpy, the morphological structure of the layer using a closer distance obtains a smooth and dense layer, then for the highest layer thickness at a distance of 150 mm with an average of 317.16 μm. 
Studi Efektivitas Jumlah Data Pengukuran Nilai Potensial Terhadap Kinerja BEIA dalam Mendeteksi Lokasi Korosi Beton Bertulang ., Israr; ., affandi; Huzni, Syifaul; Fonna, Syarizal; Tanjung, Iqbal
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.20698

Abstract

Corrosion is a very serious problem. It could not be prevented due to natural events which trigger corrosion itself. Many failures and losses caused by suboptimal early prevention of corrotion, such as the sudden collapse of buildings and infrastructure which incurring loss and casualties. One methode that is widely used to detect corrosion is the Half Cell Potential Mapping methode. However, there is shortage interpretation of data in the methods who need to be considered. Then, the software who could detect early failures caused by corrosion is developing. On of them is Boundary Element Invers Analysis (BEIA). BEIA has succeeded in detecting the location of corrosion in reinforced concrete with 5% error percentage. However, it is necessary to increas its ability. This research aims to find the effect of the amount of potensial value measurement data on BEIA ability to detect corrosion in reinforced concrete. BEIA developed by combining the application of Boundary Element Method (BEM) and Particle Swarm Optimization (PSO). BEM used to calculate potential values on concrete surface, while PSO evaluates the cost function for detecting corrosion in reinforcing steel in concrete. This research wa conducted on reinforced concrete 3-dimensional geometry, namely length, widht and height. In the middle of the concrete there is reinforcement which has corrosion. The parameter of the amount of potential value measurement data was varied in order to get better input in improving the performance of BEIA. That were 5,10, 15 and 20. The simulation showed that the used of the potential value measurement data of 20 had less error percentage value obtained at 650 cm x 50 cm geometry was 0.2 %. These proves that the larger potential value measurement data could improved BEIA performance.
Grafen untuk Aplikasi Penyerapan Gelombang Radar Mikro: Dari Sintesis Graphene Oxide (GO) Berbasis Tempurung Kelapa Yamin, Muthi'ah Alfiyah; Aritonang, Sovian; Murniati, Riri
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.17352

Abstract

ABSTRACT  Radar systems detect objects using electronic signals. Radar Absorbing Material (RAM), especially graphene, increases radar wave absorption. Using coconut waste to make Graphene Oxide (GO) supports sustainability. It advances more efficient and sustainable radar wave absorption technology. This research is based on literary analysis. The method used in this research is a literature review and in this study will compare the reflection loss material graphene oxide as a radar absorber with other materials.  This research shows that GO synthesized with the Hummer method at 400°C has the best performance in radar wave absorption, competing with other materials such as CoTi1-xCexO3 and silicone rubber variations. This makes GO an attractive choice for radar wave absorption applications, especially on microwave frequencies.Keywords:Absorber Radar, Graphene Oxide, Coconut Waste, Hummer Method
Pengaruh Konsentrasi KOH Terhadap Karakteristik Dan Kapasitansi Elektroda Karbon Aktif Super Kapasitor Mahyuda, Maulana; Sirait, Ratni; Lubis, Ridwan Yusuf
Rekayasa Material, Manufaktur dan Energi Vol 7, No 2: Juli 2024
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v7i2.19467

Abstract

Superkapasitor merupakan salah satu perangkat yang dapat menyimpan energi. Salah satu aspek yang dapat mempengaruhi tingkat keefektifan superkapasitor ialah luas permukaan elektroda. Sehingga karbon aktif dapat dijadikan elektroda kapasitor ialah karbon aktif. Pada penelitian ini telah dilakukan pembuatan karbon aktif yang berbahan dasar kulit singkong  sebagai bahan elektroda superkapasitor. Karbon aktif dibuat dengan suhu karbonisasi sebesar 200oC dengan memvariasikan konsentrasi KOH yakni sebesar 2,5 M, 3 M, dan 3,5 M. Penelitian ini menggunakan metode eksperimen yang  bertujuan untuk mengetahui pengaruh variasi konsentrasi KOH terhadap karakteristik dan kapasitansi elektroda karbon aktif kulit singkong. Bedasarkan hasil analisis XRF didapatkan bahwasanya karbon aktif kulit singkong didominasi oleh senyawa oksida logam K2O dan SiO2.. Luas permukaan karbon aktif tertinggi terdapat pada sampel karbon yang diaktivasi dengan konsentrasi KOH  3,5 M yaitu 12,835 m2/g. Dan nilai kapasitansi tertinggi ialah pada karbon aktif dengan aktivator KOH 3,5 M yakni sebesar 456,5 µF

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