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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 16 Documents
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Search results for , issue "Vol 5, No 2: September 2022" : 16 Documents clear
Pengaruh Annealing Baja St 37 Terhadap Kekerasan Dan Kekuatan Tarik Affandi .; Arya Rudi Nasution; Iqbal Tanjung; Ahmad Marabdi Siregar
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11796

Abstract

Steel ST 37 which is equivalent to AISI (The American Iron Steel Institute) is one of the steels produced for the manufacture of various machine components. To improve the mechanical properties and material structure of ST 37 Steel, it is necessary to carry out the heat treatment (annealing) process. The objective of this study was to determine the annealing treatment of ST 37 steel on hardness and tensile strength to analyze the tensile test on ST 37 steel before and after annealing treatment and to analyze the hardness test of ST 37 steel before and after annealing treatment. The annealing process is carried out by preparing the test material and inserting the test material into the furnace and tightly closing the door of the heat treatment furnace. Set the temperature to be used in the test, which is 500C, and held for 60 minutes. Then turn off the furnace and leave the test specimens in the furnace for 72 hours to cool through the air cooling medium, after which tensile and hardness tests are carried out. The test results of the tensile test specimens with the ASTM E8/E8M standard and the hardness test specimens with the ASTM E18 standard are, the average value of the tensile test results before the annealing process is 50.65 kgf/mm and the average value of the tensile test results after the annealing process is 31.45 kgf/mm. While the average value of the hardness test before the annealing process was 75.22 HRA and the average value of the hardness test after the annealing process was 67.63 HRA. From these results, ST 37 steel before the annealing process has higher hardness and tensile strength. However, in subsequent tests, harder specimens can be used compared to ST 37 Steel specimens, and in the use of heat treatment furnaces, it is preferable to be in a state of heat safety.
Mamfaatkan Limbah Plastik Jenis Styrofoam Untuk Pembuatan Paving Block Reza Elvandra Harahap; Ahmad Marabdi Siregar; Fahrizal Zulkarnain; Affandi .
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.12390

Abstract

This paving block made from Styrofoam plastic waste is a reuse plastic which has been a big problemin human life from long ago to the present this. These paving blocks are made with a mixture of Styrofoam and sand thas is made in two aggregates, namely varian one with a composition of 50% Styrofoam with a weigth of 600gr anda 50% sand with a weigth600gr and variation two with a composition of 25% Styrofoam with a weigth of 300gr and755 sand with a weigth 900gr. This research is divided in several stages, namely the collection of materials ( Styrofoam and sand), weigth with each aggragate, then cook Styrofoam and mixit with sand, stirring the specimenso that they are well mixed sand and Styrofoam, fed into the mold, extrackted in the mold when its dry. In making this specimen a specimen moled has size 200mm in length, 100mm in widthand 60mm in heigt. 3mm thick irom plate. Then the specimen is cut according to the paving test standards block SNI 03-0691-1996. The specimen is cut using a grinder until it becomes size 60mm x 60mm, then eacg variation was made into 3 specimens where to take the average at the timeof data collection. Specimen variation one produces an average compressive strength of 32MPa, while specimen variation two resulting in an average compressive strength of 25,7MPa.
Pengaruh Fraksi Volume Dan Sudut Konfigurasi Serat Phyllostachys Terhadap Kekuatan Komposit Dengan Metode Hand Lay-Up Weriono .; Abdulkhair Junaidi; Rinaldi .; Adi Isra; Mauliade Kurniawan
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11171

Abstract

Plyllostachys bamboosoides known in Asia, also called bamboo fence, is one of the choices for the construction and manufacture of furniture. Its properties also make it useful in a number of arts and crafts. The influence of ductility and toughness factors is at the microcellular level; which includes the pattern of arrangement, morphology, and mechanical properties of bamboo cells. The perfect combination of fibers and compressible parenchyma cells is the key to the excellent flexible deformation of bamboo, originally illustrated the elongation of parenchyma cells under bending through low resolution electron micrographs. The angle of the microfibrils in the cell wall plays an important role in the mechanical properties of the wood and the occurrence of interface delamination followed by matrix failure and fiber breakdown under natural growth. Tensile strength and strain due to the influence of variations in thickness and volume of composite composition with variations in manufacturing methods that can affect its mechanical properties so that it is expected to determine a good composition. The addition of bamboo fiber as a filler of Polyester resin has a significant effect on the tensile strength. Tensile testing with an angle of 450 with a thickness 1 mm resulted in the highest ultimate stress 0.027 M.Pa with 25%:75% polyester resin of bamboo fiber. The tensile strength is increased by increasing the volume of the bamboo fiber and reducing the thickness of the bamboo fiber increases the tensile strength of the composite.
Analisa Emisi Gas Buang Nissan X -Trail dengan Bahan Bakar Pertalite Dengan Penambahan Ethanol Dan Pertamax Ponidi .; Ida Ayu D S Putri
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.9512

Abstract

Vehicle exhaust emissions greatly affect the environment and human health. The fuel used in the vehicle is very influential on the results of these exhaust emissions. In Indonesia itself, the most frequently used gasoline fuel is pertalite fuel with an octane rating of 90. The purpose of this study is to compare the results of exhaust gas emissions from pure pertalite fuel, the addition of ethanol to pertalite fuel and pure pertamax. And as a reference, namely the Regulation of the State Minister of the Environment number 05 of 2006 concerning the threshold value of the exhaust gas emission threshold issued by gasoline-fueled motor vehicles. Ethanol itself is a high octane fuel and can be used to add octane rating to gasoline. Ethanol can also be used as an alternative fuel and is relatively safer for the environment. Ethanol itself can absorb moisture in the fuel tank. The addition of 10% ethanol can increase the octane rating by approximately 3 points. The octane number of ethanol is also greater than pertalite fuel. The results of this study indicate that there is an effect on the addition of ethanol to pertalite fuel with a ratio of 1: 4, namely 20% ethanol and 80% pertalite. The addition of ethanol can reduce the results of CO and HC in the exhaust gas emissions it self.
Analysis of The Performance Solar Desalination Proses With Spray in The Evapoarator Room Munawar Alfansury Airegar; Wawan Septiawan Damanaik; Sudirman Lubis; Jandri Fan HT Saragi; Arya Rudi Nasution
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11858

Abstract

The shortage of clean water sources on the earth's surface is a concern for the future. Utilization of solar thermal energy is something that can be done to get an environmentally friendly system. Desalination process is a method to produce clean water that is cheap and safe. With the experimental method, the desalination process is tested by providing a working system that considers the materials used and the addition of supporting work tools. The evaporator cover is designed to be made of clear glass with a thickness of 3 mm and an area of 1 m2 with a double slope model with an angle of 15o to the east and west, and was tested for 8 days. The result of the radiation heat transfer coefficient is that the highest convection coefficient outside the evaporator is 97.94 W/m2 on the fourth day and the value of the radiation heat transfer coefficient from the glass surface to the environment is 83.85 W/m2 on the second day. Meanwhile, the highest evaporative heat transfer coefficient was 20.30 W/m2 on day four, the highest convection heat transfer coefficient was 3.08 W/m2 on the first day, and the highest radiation heat transfer coefficient was 13.18 W/m2
Perbandingan Alogaritma Machine Learning Untuk Prediksi Sifat Mekanik Pada Baja Paduan Rendah Desmarita Leni; Yuda Perdana kusuma; Ruzita Sumiati; Muchlisinalahuddin .; Adriansyah .
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11407

Abstract

The development of industrial technology encourages companies to be selective in determining the mechanical properties of materials, one of which is low-alloy steel. The purpose of knowing the mechanical properties of low alloy steel is to support the success of a construction product, transportation, machine elements, and so on. Heat treatment of metal is one of the test methods to determine the mechanical properties of steel by heating the steel at a certain temperature. The selection of low alloy steel composition has various variations to be applied so as to obtain the desired mechanical properties. The mechanical properties of low-alloy steel are strongly influenced by the composition contained in the steel. If the composition of the steel is added to a new element, the mechanical properties of the steel will change, so it needs to be retested. This research uses machine learning modeling to predict the mechanical properties of low-alloy steels based on their chemical compositions. This study compares three algorithms, namely decision tree (DT), random forest (RF), and artificial neural network (ANN), where the ANN algorithm has better performance by producing an RMSE value of 6.187 with training cycle parameter settings of 30.000, learning rate 0.007, momentum 0.9, and size of hidden layer 9.
Pengaruh Proses Pack Carburizing Baja AISI 4340 Terhadap Peningkatan Kekerasan dan Ketahanan Aus Ilham Azmy; Deden Masruri; Rivaldy Rahardyanto; Suyitno Suyitno
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11017

Abstract

The AISI 4340 steel is widely used in severe load such as shaft, crankshafts, and connecting rods in automobile and machinery industry which required to capable maintain high mechanical strength and toughness. Since this material is very important for mechanical and engineering usage, the long wear solicitation must be required. However, it requires to high surface hardness to achieve longer lifetime and less damage. To tackle this problem, the research proposes novel experimental method of pack carburizing process on AISI 4340 steel to construct carbon layer on the surface. The process begins by packing AISI 4340 steel along with charcoal and BaCO3catalyst and heating inside the furnace at 900 oC for 4 hours to facilitate carbon diffusion on the surface. Afterwards, the sample was slowly cooled in the furnace and another sample of base AISI 4340 also prepared. The samples were subsequently examined by using spectrometry test, metallographic observation, hardness test, and wear test. The results show that pack carburized AISI 4340 steel possesses intriguing microstructure which pointed by presence of ferrite and high carbide (Fe3C) phases. The microstructure transformation of pack carburized AISI 4340 steel affects to increase high hardness value (325,4 HV) and high wear resistance compared than the base AISI 4340 steel. Thus, the pack carburized AISI 4340 steel has tenacious capability to attain long wear during mechanical and engineering applications.
Karakterisasi Variasi Biokomposit [CaCO3 : Bioplastik /Corn Starch] Terhadap Sifat Mekanis dan Mikrostruktur Agris Setiawan; Margaretha Tri Budi Yuliana
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11388

Abstract

ABSTRACT The presence limestone can be used as biomaterial for bone support. CaCO3 as matrix biocomposite and bioplastic as reinforce. This work aimed to study the effect of suspension CaCO3 and corn starch as bioplastic in mechanical properties such as tensile strength, flexural strength, shrinkage and also microstructure. The ratio composition of suspension CaCO3 : Corn Starch namely is 20:80 (w/w)%, 30:70 (w/w)%, 40:60 (w/w)%, 50:50 (w/w)% . The dimensions of the tensile test specimen are in accordance with the ASTM D638 type 4 standard, and the dimensions of the flexural test specimen are in accordance with the ASTM D790 standard. Samples are given codes such as specimen A code for composition 20:80 (w/w)%, specimen B code for composition 30:70 (w/w)%, specimen C code for composition 40:60 (w/w)%, and specimen code D for composition 50:50 (w/w)%. Based on the results of the shrinkage measurement, it showed that specimen B had the highest average shrinkage value of 180.011% for the tensile test specimen, and 160.022% for the flexural test specimen. The results of the tensile test and flexural test also showed that specimen B had the highest average value, namely the ultimate tensile strength of 0.110.015 MPa and flexural strength of 0.020.012 MPa. Meanwhile, from the microstructure test, namely SEM-EDX, the results were in the form of a spheroid-shaped specimen morphology and the dominant elements contained in the specimen were C, N, O, and Ca.
Implementasi Keselamatan dan Kesehatan Kerja (K3) Pada Aktivitas Fabrikasi (Pengelasan, Pemotongan, Penggerindaan) di Kota Medan Rahmatullah .; Bobby Umroh; Arfis Amiruddin; Ahmad Marabdi Siregar
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.11447

Abstract

Occupational safety and health (OSH) is basically in the interest of all parties and is a basic right for workers. A safe and comfortable working process is an asset that is maintained continuously for quality and timely production. Work accidents are something that is highly avoided, work accident control must be carried out with methods that are in accordance with the field and industrial conditions. The purpose of the discussion in this paper is, how to control OSH in the fabrication industry in a sustainable manner, how to create good OSH regulations and make the production process safe and comfortable, how to form a good and professional work attitude. Work accidents that occur are actually the end result of a rule and unsafe working conditions. 85% of the causes of accidents are human factors. The fabrication industry carries out several processes such as welding, cutting, final processing and other supporting processes in the workshop. Recommendations have been made and implemented to reduce and control work accidents. The application of OSH in accordance with the concept of occupational health and safety management, theoretically the industry will be able to reduce the number of work accidents even to zero accidents from work accidents.
Desain Alat Pencacah Sampah Organik Berkapasitas 40 Kg/Jam Wilarso .; Aswin Domodite; Hilman Sholih; Rudi Indrawan; Fauzi Ramdani
Rekayasa Material, Manufaktur dan Energi Vol 5, No 2: September 2022
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v5i2.10380

Abstract

To improve the quality of fish livestock, bait that has the nutrients needed is needed. However, the obstacles experienced by farmers are getting their feed that does not meet the criteria, and in the process, they still use manual tools. The purpose of this research is to design an organic waste chopper with a capacity of 40 Kg/minute for the needs of making compost and eating maggots (black flies). The method in the research conducted using solid work to determine the shape, size, and working system of the tool. The method in this study is the design of an organic waste chopper with a capacity of 40 kg/minute. The results of this study are the design of an organic waste chopper with a capacity of 40 kg/minute to reduce organic waste and can be used as organic compost, liquid compost, or black fly bait media for fish feed. The calculation is that the electric motor shaft torque is 79 Nm, with a tensile stress of 33.6 N/m2. Meanwhile, in the calculation of the capacity obtained as follows; 1. Calculation of the capacity of the counter Q = 667 grams/minute. 2. Planned blade rotation 5,929 rev/min. 3. Motor power 1500 Watt, 4. Tensile voltage 33.6 N/m2. 5) Calculation of cutting capacity 2.025 gram/min. Based on the initial design of this chopper, it is 40 Kg/hour

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