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METALOGRAM
Published by Universitas Riau Kepulauan Batam
ISSN : -     EISSN : 30902460     DOI : https://doi.org/10.33373/mtlg.v2i1
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Control & Systems Engineering Engineering Industrial & Manufacturing Engineering
Metalogram is published by Program Studi Teknik Mesin, Fakultas Teknik, Universitas Riau Kepulauan, Batam, Indonesia. Metalogram is an open-access peer reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. Metalogram accepts submission from all over the world. Metalogram aims to provide a forum for national and international academicians, researchers and practitioners on mechanical engineering to publish the original articles. All accepted articles will be published and will be freely available to all readers with worldwide visibility and coverage. The scope of Metalogram is in engineering such as design, energy conversion, manufacture, and metallurgy, asset management engineering.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 8 Documents
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Search results for , issue "Metalogram Vol.2 No.2 (April, 2026)" : 8 Documents clear
Optimization of Thermal System Performance to Improve Energy Efficiency Vigo, Yosua Luis; Pratama, Agung; sipahutar, Sumarhadi; munif, Moh abdul
METALOGRAM Metalogram Vol.2 No.2 (April, 2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i2.8846

Abstract

This paper investigates the optimization of thermal system performance to improve energy efficiency using a quantitative simulation-based approach. Thermal systems are widely applied in industrial and building sectors, where inefficient heat transfer often results in excessive energy consumption. This study aims to evaluate key thermal performance parameters and analyze optimization strategies based on energy balance and heat transfer principles. Parametric simulations were conducted by varying insulation quality, operating temperature, and heat loss rates. The results show
Analyis Of Gear Strenght In Machine Construction amiko, amiko; Pratama, Yuki Alvandi; Gusman, Beny; Adriansyah, Muhamad; Hasibuan, Fardin; Efiano, Eddy
METALOGRAM Metalogram Vol.2 No.2 (April, 2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i2.7457

Abstract

Gears are essential components in mechanical transmission systems, responsible for transferring power between shafts in various types of machinery. The strength of gears plays a critical role in the efficiency and reliability of these systems, as improper load handling can lead to material failure or gear damage. This study aims to analyze the strength of gears by considering several factors such as material properties, geometry, and operational conditions. The materials tested in this research include carbon steel SAE 1045, alloy steel SAE 4140, and stainless steel (SS 304), all of which are commonly used in gear applications. The gear geometry analyzed includes variations in module (2 mm and 3 mm), the number of teeth (20 teeth), and the pressure angle (20 degrees). The research methodology includes Finite Element Analysis (FEA) to simulate stress distribution on gears under both dynamic and static loading conditions, along with experimental testing to validate the simulation results. The results show that SAE 4140 alloy steel exhibits superior tensile strength and wear resistance compared to SAE 1045 carbon steel, though at a higher cost. Stainless steel (SS 304) offers excellent corrosion resistance but lower tensile strength, making it less suitable for high-load applications. Additionally, increasing the gear size (3 mm module) reduces stress on the teeth but increases the overall size and weight of the gear. This study provides important insights into material selection and gear design, helping to improve the strength and durability of mechanical transmission systems.
Thermal Optimization of Aluminium Fishing Sinker Mold Using Cooling Channel Design Arifin, Yahya Hafiizh; Putra, Akhri Ramadhan; hasibuan, fardin; Irsyam, Muhammad
METALOGRAM Metalogram Vol.2 No.2 (April, 2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i2.8849

Abstract

Thermal performance of mold plays a critical role in determining the quality and productivity of aluminium casting products, including fishing sinkers. Improper temperature distribution within the mold can lead to casting defects, uneven solidification, and extended cooling time. This study focuses on the thermal optimization of an aluminium fishing sinker mold through the design and improvement of cooling channel configurations. Numerical simulations based on heat transfer analysis are conducted to evaluate temperature distribution, cooling efficiency, and solidification behavior within the mold. Several cooling channel designs are analyzed and compared to identify the most effective configuration for achieving uniform temperature distribution and enhanced heat dissipation. The results show that optimized cooling channel design significantly reduces temperature gradients, shortens cooling time, and improves overall casting quality. This study demonstrates that thermal optimization through proper cooling channel design is an effective approach to enhancing the performance and reliability of aluminium fishing sinker molds.
Analysis of the Performance of the Liquid Cooling System on the Thermal Efficiency of Honda Vario 125 Motorcycle Mahariyanto, Kiki Dwi Putra; Rinaldy, Habib; Siburian, Subayu; Hasibuan, Fardin; Ritonga, Oloan; Safi'i, Ilham; Suharjo, Tanto
METALOGRAM Metalogram Vol.2 No.2 (April, 2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i2.8851

Abstract

This study discusses the performance of the liquid cooling system on the Honda Vario 125 motorcycle to understand its effect on the thermal efficiency of the engine during operation. The liquid cooling system plays a role in keeping the engine temperature stable, so that the combustion process takes place more effectively. The test was carried out by taking data on cylinder head temperature, coolant temperature, and fuel consumption at various engine rev levels. The data obtained is analyzed to assess the ability of the cooling system to reduce temperature rise and keep the engine at an optimal working range. The results show that at medium to high cycles, liquid cooling systems are able to maintain temperature stability with relatively small fluctuations. These more stable thermal conditions contribute to improved combustion efficiency which is reflected in decreased specific fuel consumption and increased thermal efficiency. These findings indicate that the cooling system design on the Honda Vario 125 has adequate capabilities to maintain consistent engine performance, especially in daily use with load variations. This study can be a technical reference in the development of motor vehicle cooling systems.
Performance Evaluation of A Coconut Grating Machine Jide Olusegun, Adedipe; I.O, Yusuf; O.S, Oyeleke
METALOGRAM Metalogram Vol.2 No.2 (April, 2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i2.8576

Abstract

This study evaluates the performance of a locally fabricated coconut grating machine developed to address the inefficiencies, safety risks, and high labour demand associated with manual coconut grating. The machine operates on the principles of rotation and shearing. It comprises an electric motor, a stainless-steel grating shaft, a collector, and a reinforced support frame. A performance assessment was conducted using replicated trials to determine workability, throughput capacity, grating efficiency, and material loss. The evaluation involved measuring the initial and final weights of coconuts over twenty grating cycles. Results showed that the machine achieved a mean efficiency of 98%, attributed to its optimized shearing mechanism and minimal product loss (0.002 kg over an average grating duration of 59 s). Throughput capacity ranged from 0.16 to 0.77 kg/s, significantly surpassing manual grating operations. Graphical illustrations demonstrated that throughput increased with increasing material weight, while efficiency slightly declined at reduced loading; this could indicate that the machine performed optimally under moderate-to-high feed weights. Comparisons with manual grating revealed similar weight-loss trends but superior speed and safety advantages for the machine. Overall, the developed coconut grating machine offers a safe, efficient, and scalable solution for households and small-scale processors. For future improvements, focus could be on reducing clogging and enhancing adaptability to different coconut varieties.
Analysis Of The Effect Of Rainfall On The Corrosion Rate Of Car Frames In 10 Regions In Indonesia That Have High Rainfall Levels putra, arvian enggal; manulang, togu juliman; manurung, stepeen binsar; nimo, willy brodus; Hasiubuan, Fardin
METALOGRAM Metalogram Vol.2 No.2 (April, 2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i2.8087

Abstract

This study aims to understand how much rainfall affects damage (corrosion) to car frames in 10 regions in Indonesia that are often hit by heavy rain. The car's frame is essential for the strength and safety of the vehicle, but it can be severely damaged by corrosion. In Indonesia, which has a tropical climate with high rainfall, rainwater can accelerate corrosion because it acts as a "carrier" of destructive substances from the air. We will collect rainfall data from 10 selected locations and test pieces of steel (similar to car frame materials) in those locations for a minimum of 6 months. After that, we will measure how much the steel has reduced in weight (due to corrosion) and see changes to its surface. We will also analyze rainwater content (such as acidity and salt content) to find out what substances accelerate corrosion. The collected data will be statistically processed to see the relationship between rainfall and corrosion velocity, as well as the role of other environmental factors. It is hoped that the results of this study will provide a clear understanding of how corrosion occurs in the tropics of Indonesia and provide practical advice to protect the car frame, so that the car can be more durable and safe.
Effect of CO₂ and Argon Gas Shielding on GMAW Welding Joint Quality Ma'asya, Safira; Alfharizi, Muhammad; Manullang, Togu Julianman; Tawaris, Andrean Bastian; Hasibuan, Fardin; Irsyam, Muhammad
METALOGRAM Metalogram Vol.2 No.2 (April, 2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i2.7866

Abstract

This study aims to evaluate the effect of shielding gas types, namely carbon dioxide (CO₂) and argon, on the quality of welded joints in the Gas Metal Arc Welding (GMAW) process with low carbon steel as the base material. The research method was carried out experimentally using a steel plate measuring 150 mm × 75 mm × 6 mm and an ER70S-6 electrode wire with a diameter of 1.0 mm. The welding process was carried out with an inverter-type GMAW machine using fixed parameters: 120 ampere current, 22 volt voltage, 4 mm/s welding speed, 12 mm stick-out distance, and 15 liters per minute shielding gas flow rate. The specimens were divided into two groups based on the shielding gas, namely pure CO₂ and pure argon. Evaluation of the joint quality was carried out through tensile tests, Vickers hardness tests on three main zones (weld metal, heat affected zone, and base metal), as well as microstructure and visual observations. The results showed that the specimens with argon gas had a higher average tensile strength (460 MPa) than CO₂ (420 MPa). The hardness values were also higher and more even in the argon specimens, with a finer and more uniform microstructure. In conclusion, the use of argon produces welds with better mechanical and metallurgical qualities than CO₂. Therefore, argon is more recommended for welding low carbon steels that require high strength and precision.
Evaluation of Thermal Spray Aluminum Coating Implementation Based on Procedure Qualification Test (PQT) Inspection Data for Offshore Steel Structures Ani, Fitri; Hasibuan, Fardin; Putra, Dwi Cahyadi
METALOGRAM Metalogram Vol.2 No.2 (April, 2026)
Publisher : Universitas Riau Kepulauan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33373/mtlg.v2i2.8881

Abstract

Thermal Spray Aluminum (TSA) coating is widely applied for corrosion protection of offshore steel structures operating in aggressive marine environments. In practical offshore projects, the quality of TSA coating implementation is primarily verified through inspection activities conducted during Procedure Qualification Tests (PQT). In this study, an inspection-based evaluation of TSA coating implementation was performed using documented PQT inspection records obtained from an offshore steel structure, without additional laboratory testing. TSA coating was applied using a twin wire electric arc spray process, and coating quality was assessed based on dry film thickness (DFT) measurements recorded at five inspection points. The measured DFT values ranged from 216 µm to 357 µm, with an average thickness of 284.8 µm. To ensure general applicability, the thickness distribution was interpreted using inspection-derived statistical indicators, including a thickness uniformity index and coefficient of variation. The results indicate a uniform coating build-up and stable application characteristics typical of arc-sprayed aluminum coatings. It is concluded that PQT inspection data provide a practical and reliable basis for evaluating TSA coating implementation and thickness consistency in offshore steel structure applications.

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