International Journal of Mechanical Engineering Technologies and Applications (MECHTA)
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.
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<![CDATA[Quality Analysis of 5.56 mm Ammunition Defect using Taguchi Method: A Review ]]>
<![CDATA[Anggamawarti, Merlina Fitri]]>;
<![CDATA[Alviari, Luana Putri]]>;
<![CDATA[Sanjiwani, Yudistira]]>;
<![CDATA[Risonarta, Victor Yuardi]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/mechta.2020.001.01.5
<![CDATA[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.]]>
<![CDATA[The Effect of Sand Blasting on Shear Stress of Fiberglass - Shorea spp. Composite ]]>
<![CDATA[Widodo, Teguh Dwi]]>;
<![CDATA[Raharjo, Rudianto]]>;
<![CDATA[Risonarta, Victor Yuardi]]>;
<![CDATA[Bintarto, Redi]]>;
<![CDATA[Kusumaningsih, Haslinda]]>;
<![CDATA[Saputra, Muhamad Hendra]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/mechta.2020.001.01.1
<![CDATA[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.]]>
<![CDATA[The Influence of Homogenization on Corrosion Rate of Zinc as Sacrificial Anode for API 5L X65 Steel ]]>
<![CDATA[Fitriani, Siti Noor]]>;
<![CDATA[Setyarini, Putu Hadi]]>;
<![CDATA[Risonarta, Victor Yuardi]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/mechta.2020.001.01.2
<![CDATA[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.]]>
<![CDATA[Influence of Surface Roughness and Paint Coating on Corrosion Rate ]]>
<![CDATA[Akbar, Dekrit H.]]>;
<![CDATA[Purnami, Purnami]]>;
<![CDATA[Budio, Sugeng Prayitno]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
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DOI: 10.21776/mechta.2020.001.01.3
<![CDATA[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)]]>
<![CDATA[Classification of Impact Damage on A Rubber-Textile Conveyor Belt: A Review ]]>
<![CDATA[Alviari, Luana Putri]]>;
<![CDATA[Anggamawarti, Merlina Fitri]]>;
<![CDATA[Sanjiwani, Yudistira]]>;
<![CDATA[Risonarta, Victor Yuardi]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
Show Abstract
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DOI: 10.21776/mechta.2020.001.01.4
<![CDATA[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.]]>
<![CDATA[The Effect of Sand Blasting on Shear Stress of Fiberglass - Shorea spp. Composite ]]>
<![CDATA[Widodo, Teguh Dwi]]>;
<![CDATA[Raharjo, Rudianto]]>;
<![CDATA[Risonarta, Victor Yuardi]]>;
<![CDATA[Bintarto, Redi]]>;
<![CDATA[Kusumaningsih, Haslinda]]>;
<![CDATA[Saputra, Muhamad Hendra]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
Show Abstract
|
Download Original
|
Original Source
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Check in Google Scholar
|
DOI: 10.21776/mechta.2020.001.01.1
<![CDATA[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.]]>
<![CDATA[The Influence of Homogenization on Corrosion Rate of Zinc as Sacrificial Anode for API 5L X65 Steel ]]>
<![CDATA[Fitriani, Siti Noor]]>;
<![CDATA[Setyarini, Putu Hadi]]>;
<![CDATA[Risonarta, Victor Yuardi]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[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
<![CDATA[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.]]>
<![CDATA[Influence of Surface Roughness and Paint Coating on Corrosion Rate ]]>
<![CDATA[Akbar, Dekrit H.]]>;
<![CDATA[Purnami, Purnami]]>;
<![CDATA[Budio, Sugeng Prayitno]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[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
<![CDATA[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)]]>
<![CDATA[Classification of Impact Damage on A Rubber-Textile Conveyor Belt: A Review ]]>
<![CDATA[Alviari, Luana Putri]]>;
<![CDATA[Anggamawarti, Merlina Fitri]]>;
<![CDATA[Sanjiwani, Yudistira]]>;
<![CDATA[Risonarta, Victor Yuardi]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[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
<![CDATA[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.]]>
<![CDATA[Quality Analysis of 5.56 mm Ammunition Defect using Taguchi Method: A Review ]]>
<![CDATA[Anggamawarti, Merlina Fitri]]>;
<![CDATA[Alviari, Luana Putri]]>;
<![CDATA[Sanjiwani, Yudistira]]>;
<![CDATA[Risonarta, Victor Yuardi]]>
<![CDATA[ International Journal of Mechanical Engineering Technologies and Applications Vol. 1 No. 1 (2020) ]]>
Publisher : <![CDATA[Mechanical Engineering Department, Engineering Faculty, Brawijaya University ]]>
Show Abstract
|
Download Original
|
Original Source
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Check in Google Scholar
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DOI: 10.21776/mechta.2020.001.01.5
<![CDATA[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.]]>
