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Khairul Anam
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Redaksi International Journal of Mechanical Engineering Technologies and Applications (MECHTA), Jurusan Teknik Mesin Fakultas Teknik, Universitas Brawijaya Jl. MT. Haryono 167 Malang, Jawa Timur Indonesia 65145
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International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
Published by Universitas Brawijaya
ISSN : -     EISSN : 27223213     DOI : https://doi.org/10.21776/ub.mechta
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering
International Journal of Mechanical Engineering Technologies and Applications (MECHTA) is published by Mechanical Engineering Department, Engineering Faculty, Brawijaya University, Malang, East Java, Indonesia. MECHTA is an open-access peer-reviewed journal that mediates the dissemination of academicians, researchers, and practitioners in mechanical engineering. MECHTA accepts submissions from all over the world, especially from Indonesia. MECHTA aims to provide a forum for 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 MECHTA is specific topics issues in mechanical engineering such as design, energy conversion, manufacture, and metallurgy. All articles submitted to this journal can be written in the English Language.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 71 Documents
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Synthesis of Hematite Pigment (A-Fe2O3) from Iron Lathe Waste using Precipitation-Sonication Method as Anti-Swelling on Wood Dewi Elok Rahmawati; Lilik Miftahul Khoiroh; Rachmawati Ningsih; Febi Yusniyanti; Wariatus Solawati; Puspa Sari
International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.5

Abstract

Iron lathe waste powder has the potential as a raw material in the synthesis of hematite pigments. Hematite pigments have many advantages, one of which is anti-swelling properties that can maintain the dimensions of wood. Hematite pigment synthesis was carried out using the precipitation-sonication method. The precipitation stage uses an ammonium hydroxide solution as a precipitating agent. Stages of sonication using the PEG-6000 template were performed at different times were 30, 45, and 90 minutes then calcined at 750 ° C for 3 hours. The samples were characterized by X-ray diffraction (XRD), color reader, and scanning electron microscope-energy dispersive X-Ray (SEM-EDX). The result confirmed that a ferrihydrite phase obtained after the precipitation process and transform into hematite after the calcination process with the highest degree of crystallinity for 90-minute sonication. From a color reader, the brightness and redness degrees decrease with increasing time. Scanning electron microscope results illustrated that the morphology was not uniform with the particle size getting smaller with increasing sonication time. The EDX results show that hematite pigments still contain impurities such as carbon. The swelling test indicated that the highest stability in hematite-pigmented wood increased as increasing in the weight of pigment.
Quality Analysis of 5.56 mm Ammunition Defect using Taguchi Method: A Review Merlina Fitri Anggamawarti; Luana Putri Alviari; Yudistira Sanjiwani; Victor Yuardi Risonarta
International Journal of Mechanical Engineering Technologies and Applications Vol 1, No 1 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/mechta.2020.001.01.5

Abstract

In a manufacturing company, the quality loss is estimated by considering the number of defects. Taguchi is a method that finds strong conditions in uncontrollable environments of the field. Taguchi quantifies quality loss through a quality loss function. The Taguchi method particularly is focused on industrial processes. The method is actualizing quality philosophy for continuous quality improvement and cost reduction to improve manufacturing performance. The analysis is designed using Taguchi technique which is related to quality. A high-quality product has a minimal defect. The Taguchi method is used to analyze several defects of ammunition to reduce the number of ammunition defects. Ammunition consists of several parts are called projectile or bullet, cartridge case, propellant charge, and primer. Every part of its process possibly contributes to any defect. The defect type in every part of ammunition consists of critical, major, and minor defects. This paper is focused on cartridge case caliber 5.56 mm defect by using the Taguchi method. The quality characteristic of the experiment result used is smaller the better. Critical to Quality (CTQ) is determined to get a critical defect for cartridge cases such as split and perforated case. The influencing factors are brass cup thickness, hardness case after annealing, and annealing temperature. The Taguchi method is effective in reducing defects for the ammunition process to produce a good quality product.
Effect of SCADA Implementation to Productivity in Ammunition Industry: A Review Yudistira Sanjiwani; Victor Yuardi Risonata; Ilham Afif; Salim Subarkah
International Journal of Mechanical Engineering Technologies and Applications Vol 1, No 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.1

Abstract

Within the last years, global industries are hyping over Industry Revolution 4.0. Utilizing the computer science combining with the mechatronics, each industry strives to increase productivity and efficiency. Of those industries is the ammunition industry. Regarded as one of the strategic industry of a nation, the ammunition industry needs to quickly adapt to the technological advance, the beginning of a new era. The old-schooled method in production control is outdated and needs to be replaced. Supervisory control and data acquisition (SCADA), one of the newest method for production control, has been developed for several years. The exact form of implementation is however yet fixed. It has to be specifically developed for each industry, i.e. the ammunition industry in this case. With the rapidly growing information technology and science, the ammunition industry is expected to be able to implement the best suited control system to increase and to optimize its production capacity.
The Effect of Sand Blasting on Shear Stress of Fiberglass - Shorea spp. Composite Teguh Dwi Widodo; Rudianto Raharjo; Victor Yuardi Risonarta; Redi Bintarto; Haslinda Kusumaningsih; Muhamad Hendra Saputra
International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/mechta.2020.001.01.1

Abstract

A coating is widely applied to protect base material during contact with surrounding. One important application in engineering is to protect a boat hull. The coating is applied to boat hull to prevent a decrease of mechanical properties of base materials particularly with corrosive seawater. Composite coating is applied since the composite coating provides better protection compared to paint coating. Additionally, sandblasting prior to composite coating is worked out to improve the mechanical properties of the coating. This work investigated the influence of the projection angle of the sandblasting process on the shear strength of the coated surface. The projection angle of sandblasting was varied from 30 to 90 °. The result shows that a higher projection angle decreases the strain strength of the coating surface. The experiment work showed that the shear strength of 30°, 45 °, 60 °, and 90°projection angle are 1.02, 0.66, 0.38, and 0.24 MPa, respectively.
Optimization of Cutting Speed and Feed Rate on Surface Roughness and Vibration using Taguchi Method: A Review Mohammad Ilham; Suparjon Suparjon; Yudistira Sanjiwani
International Journal of Mechanical Engineering Technologies and Applications Vol 1, No 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.2

Abstract

The result of a turning process is strongly influenced by the process parameters that could result in the product to be unacceptable. The cutting parameters may be determined according to the material hardness and roughness of the workpiece surface. The purpose of this paper is to investigate the effects of cutting speed and feed rate on surface roughness and vibration. In Taguchi method, the number of experiments is reduced by orthogonal arrays while  the effects of uncontrollable factors are also also reduced. The Taguchi method is used to reduce track, experimental time and production cost. Simple and precise are the most benefits of this method. Unstable vibrations in machining operations, known as chats, can cause damage to tools, workpieces, and machine tools. Cutting force is found to be the most dominant factor affecting surface roughness.
The Influence of Homogenization on Corrosion Rate of Zinc as Sacrificial Anode for API 5L X65 Steel Siti Noor Fitriani; Putu Hadi Setyarini; Victor Yuardi Risonarta
International Journal of Mechanical Engineering Technologies and Applications Vol 1, No 1 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/mechta.2020.001.01.2

Abstract

Corrosion is a material degradation due to electrochemical reactions involving electrical current. Corrosion cannot be avoided but it can be managed. This work investigated the influence of holding time and temperature variation for the homogenization process of Zinc (Zn) alloy. This zinc alloy is used as a sacrificial anode to decrease the corrosion rate of API 5L X65 steel. The investigation was performed with 3 varied holding times of 2, 4 and 6 hours of homogenization process while the temperature was varied at 150, 250 and 350ºC. After that, a zinc alloy with a size of 40mm x 0.44 mm x 10 mm was connected to a cathode.  Together with steel, both metals formed galvanic cells in this study. The metal with lower electricity potential became the anode and corroded. On the other hand, metal with higher electrical potential became the cathode and did not corrode. The lowest corrosion rate was obtained for homogenization at 150ºC and 2 hours holding time. At this condition, the corrosion rate decreased by 38.36%. This occurred since higher temperatures and longer holding time of Zinc homogenization resulted in bigger and rougher grains.
Comparison of The Use of Number and Type of Spark Plugs on One Cylinder Gasoline Machine Performance Ahmad Fariza; Yuniarto Agus Wonoko; Umi Anis Ro’isatin
International Journal of Mechanical Engineering Technologies and Applications Vol 1, No 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.3

Abstract

The basic concept of a combustion motor is to convert chemical energy into heat energy and then convert it to mechanical energy. Heat energy is produced from the combustion process between a mixture of fuel and air with a pressure difference triggered by  spark (flame). The objective is to determine the difference in power, torque, and average effective pressure by adding the number of spark plugs and using the standard type of spark plug and iridium on a single-cylinder engine. The engine performance testing method uses P-max to get power, while the analysis uses experimental design, the data processing method uses DOE-factorial and the Minitab application 18. Power test for a standard spark plug resulted in 7.93 HP, 0.89 kgm torque and 1207.66 kPa average effective pressure. For iridium spark plug the test produced 9.02 HP, it is  0.91 kg.m for torque and average effective pressure is 1226.32 Kpa. For two standard spark plugs, the power was 9.38 HP, torque was 0.93 kg.m, and the average effective pressure was 1269.96 kPa. Whereas the two iridium spark plugs produced 9.59 HP, 0.91 kg.m torque, and  1277.78  kPa average effective pressure.
Influence of Surface Roughness and Paint Coating on Corrosion Rate Dekrit H. Akbar; Purnami Purnami; Sugeng Prayitno Budio
International Journal of Mechanical Engineering Technologies and Applications Vol 1, No 1 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/mechta.2020.001.01.3

Abstract

The technology of paint and its application develop fast, driven by the increasing cost of energy, raw material and labors. In this study, paint was used as a corrosion inhibitor on the surface of API 5L while saltwater is used as the corrosive media. The coating was varied for three different cases, i.e. primary coating only, primary and color coating as well as primary, color and glossy coating. Meanwhile, surface roughness was varied for 0.6, 0.7 and 0.8 μm. It is concluded that surface roughness and coating influence the corrosion rate. Smoother the surface and more coating layers lower the corrosion rate. Based on the study on API 5L steel, the lowest corrosion rate was obtained at 0.6 μm with 3 paint coatings (primary, color paint and clear/gloss)
Corrosion Behavior of Ternary Zr-25Ti-5Sn Alloy Doped with Ge as Biomaterials Implant in Simulation Body Fluid Solution Naufal Randi Pratama; Faizal Faizal; Djoko Hadi Prajitno
International Journal of Mechanical Engineering Technologies and Applications Vol 1, No 2 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2020.001.02.4

Abstract

Corrosion research of metal alloys of Zr-25Ti-5Sn and Zr-25Ti-3Sn-2Geas biomaterials has been carried out in fluid solution. Zr-25Ti-5Snalloy is a ternary metal alloy developed for hard tissue biomaterials. Zr-25Ti-5Sn and Zr-25Ti-3Sn-2Ge alloys is melted in electric arc furnace. After being melted Zr-25Ti-5Sn and Zr-25Ti-3Sn-2Ge were characterized by optical microscopy. Hardness testing was carried out by the hardness microvickers method to determine the effect of germanium addition on Zr-25Ti-5Sn alloys. Corrosion testing of ternary metal alloys Zr-25Ti-5Sn and Zr-25Ti-3Sn-2Ge was carried out by the Tafel polarization method using three electrode systems. From the results of microstructure examination with optical microscope, the microstructure found in the ternary metal alloy Zr-25Ti-5Sn and Zr-25Ti-3Sn-2Ge are parallel plates and dendritic. The hardness test results show that the addition of germanium to the Zr-25Ti-5Sn ternary alloy increased the hardness of the alloy. Corrosion test results on ternary alloy Zr-25Ti-5Sn and Zr-25Ti-3Sn-2Geindicated that corrosion resistance of Zr-25Ti-5Snincreased when no addition of Germanium to Zr-25Ti-5Snalloy.
Classification of Impact Damage on A Rubber-Textile Conveyor Belt: A Review Luana Putri Alviari; Merlina Fitri Anggamawarti; Yudistira Sanjiwani; Victor Yuardi Risonarta
International Journal of Mechanical Engineering Technologies and Applications Vol 1, No 1 (2020)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/mechta.2020.001.01.4

Abstract

A conveyor belt is one type of goods transportation in technological processes, particularly in the mining industry. The belt is the important material and principal part of the conveyor belt. The overall quality of the conveyor belt as its service life and impact loads are very important factors. Therefore, the purpose of this paper is to classify the types of impact damage that may occur in rubber-textile conveyor belts. In many works, many types of conveyor belts are tested at various levels and the type of impacting material. The level of damage occurred is investigated by using probability theory. Particularly, the evaluation of experimental test data and predictive modeling is carried out using the Naïve Bayes classification.

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