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ARMATUR : Artikel Teknik Mesin dan Manufaktur
Published by Universitas Muhammadiyah Metro
ISSN : 2722080X     EISSN : 27220796     DOI : https://doi.org/10.24127
Core Subject : Engineering,
Aerospace Engineering Automotive Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
ARMATUR : Artikel Teknik Mesin dan Manufaktur [ISSN (online) : 2722-0796, ISSN (cetak) : 2722-080X], merupakan jurnal terbitan berkala yang diterbitkan oleh Program Studi Teknik Mesin, Fakultas Teknik, Universitas Muhammadiyah Metro. ARMATUR terbit 2 kali dalam setahun bulan Maret dan September, memuat hasil-hasil penelitian dalam bidang Teknik Mesin dan Manufaktur. Dalam sekali penerbitan, ARMATUR memuat 5-10 artikel dengan 5-10 halaman per artikel. Proses penerimaan naskah jurnal sepenuhnya dilakukan melalui Online Journal Sistem (OJS).
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 165 Documents
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Evaluasi Kinerja Cooling Tower Tipe Counter Flow Mechanical Induced Draft pada Pembangkit Listrik Tenaga Panas Bumi (Studi Kasus: PT Pertamina Geothermal Energy (Tbk), Area Ulubelu, Unit 4) Agus Apriyanto; Amrul; Hadi Prayitno; Hafizd Zakiyun Al Rasyid
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11089

Abstract

The cooling tower is one of the vital components in a Geothermal Power Plant (PLTP) system, functioning to cool the condensate water from the condenser before it is reused. This study aims to analyze the effectiveness of a counter flow mechanical induced draft cooling tower at PLTP Unit 4, PT Pertamina Geothermal Energy (Tbk), Ulubelu Area. The data were obtained from field measurements conducted over seven days at fourtime intervals each day. The parameters analyzed include range, approach, and effectiveness, calculated using inlet water temperature, outlet water temperature, and wet bulb temperature. The results show an average effectiveness value of 70.05%, with variations influenced by changes in range and approach values. This effectiveness is close to the design standards stated in the manufacturer’s specifications, indicating that the cooling tower operates with good performance. This analysis provides an overview of the actual equipment condition and can serve as a reference for maintenance and performance optimization in the future.
Analisis pengaruh ketebalan dan jenis Coating terhadap kekuatan Adhesi pada Pelat Baja SA 516 Gr 70 Muhammad Syauqi; Rachmad Syarifudin H; Wahyu Dwi K; Sigit N
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11093

Abstract

SA 516 Gr 70 carbon steel is often used in pressure vessels, requiring a coating system with good adhesive strength to prevent failure due to corrosion. This study analyzes the effect of coating type and thickness on the adhesive strength of SA 516 Gr 70 plates using the pull-off test method in accordance with ASTM D4541. The two coating systems tested were Interbond 2340 (UPC) and Interline 399, with variations in dry film thickness (DFT) of 75 µm, 125 µm, and 175 µm. Surface preparation was carried out through an abrasive blasting process with a cleanliness level of Sa 2½, accompanied by control of roughness profile, salt contamination, dust cleanliness, and control of application environmental conditions to maintain coating quality. Test results show that Interbond 2340 produces higher adhesion values than Interline 399 across all thickness variations, confirming the influence of coating type on coating adhesion performance. A maximum adhesion value of 17.09 MPa was obtained for Interbond 2340 with a thickness of 125 µm, indicating the optimal thickness for increasing the bond strength of the coating to the steel substrate. All specimens met the ASTM D4541 requirements, with Interbond 2340 at a thickness of 125 µm showing the most superior adhesion performance and can be used as a technical reference in selecting a coating system for pressure vessel applications.
Pengaruh Variasi Waktu Sputtering Terhadap Karakteristik Mekanik dan Evolusi Struktur Mikro Baja AISI 4140 Mutaqin, Niki Agastia; Amarullah
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11127

Abstract

AISI 4140 steel is a high‑strength, low‑alloy material commonly used in mechanical components subjected to high load and friction. Although its bulk properties are favorable, surface modification is often required to enhance wear resistance and prolong service life. This study investigates the influence of DC sputtering Titanium Nitride (TiN) deposition time on the mechanical performance and microstructural evolution of AISI 4140 steel. The experimental procedure varied sputtering times at 30, 60, 90, 120, and 150 minutes while maintaining constant processing parameters. Characterization techniques included Vickers hardness testing, wear testing, and SEM–EDX analysis to evaluate coating morphology and coating–substrate interface quality. The results indicate that TiN deposition significantly enhances surface hardness compared to the uncoated substrate. The maximum hardness value of 186.66 VHN was achieved at 60 minutes of deposition, corresponding to a dense, uniform coating with strong adhesion. Prolonged deposition times, however, led to decreased hardness and increased wear rate, attributed to excessive coating thickness, microstructural non-uniformity, and the formation of micro-defects. SEM observations corroborate these findings by revealing notable variations in coating morphology and interface integrity across deposition durations. Overall, the study concludes that sputtering time is a critical parameter in optimizing TiN coatings to improve the surface performance of AISI 4140 steel for engineering applications.
Analisis Sifat Mekanik Uji Tarik Material Komposit Serat Karbon–Epoksi 1011l dengan Metode Manufaktur yang Berbeda Utama, Agus Bayu; Abdurohman, Kosim; Habibullah, Moh.; Agustian, Rialdi
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11171

Abstract

Carbon fiber reinforced polymer composites are widely used in structural applications due to their high strength-to-weight ratio. Manufacturing methods significantly affect fiber impregnation quality, void content, and mechanical properties. This study investigates the effect of different manufacturing methods on the tensile properties of carbon fiber–epoxy 1011L composites with 0° fiber orientation. Three manufacturing methods were used: hand lay-up (HLU), vacuum bagging (VB), and vacuum assisted resin infusion (VARI). A total of 21 specimens were tested using a Universal Testing Machine (UTM) at the National Research and Innovation Agency (BRIN) following ASTM D3039. The results show that The VARI method showed the best mechanical performance with an average maximum point stress (MPS) of 774,31 MPa and an elastic modulus (ME) of 39.313 MPa, followed by the vacuum bagging and hand lay-up methods. The hand lay-up method produced the lowest MPS and ME values, at 507,72 MPa and 20.401 MPa, respectively. The VARI method produces the best mechanical properties compared to the hand lay-up and vacuum bagging methods.
Analisis Hidrodinamika dan Karakteristik Pressure Drop pada Fotobioreaktor Flat-Panel Sistem Closed-Loop Menggunakan Computational Fluid Dynamics hidayat, alif nur; Sena , Boni; Siswadi; Agustin , Aisyah; Aprellya, Putri; Herlambang, Pratikara
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11250

Abstract

Hydrodynamic performance plays a crucial role in determining flow distribution and hydraulic losses inside flat-panel photobioreaktor systems. This study aims to investigate the flow characteristics and pressure drop behavior of a closed-loop flat-panel photobioreaktor using a Computational Fluid Dynamics (CFD) approach. A three-dimensional steady and incompressible laminar model was employed with water as the working fluid. Inlet velocities of 0.01 m/s, 0.03 m/s, 0.05 m/s, and 0.1 m/s were applied to evaluate their influence on velocity distribution, streamline patterns, and pressure drop. A grid independence study was conducted using three mesh densities, and the final mesh with an element size of 0.015 m showed less than 1% variation in pressure drop, confirming mesh-independent results. The simulation results indicate that increasing inlet velocity significantly increases pressure drop and maximum velocity within the reaktor due to flow acceleration near the inlet region. Streamline analysis reveals the formation of recirculation zones in the lower section of panel.
Analisis Waste Pada Proses Produksi Chain Wheel Gear Menggunakan Pendekatan Lean Manufacturing Pada PT Sinar Agung Selalu Sukses pitapus rini; Maulana Fajrian; Ratna Agil Apriani
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11215

Abstract

The global automotive industry faces increasing pressure to improve productivity, quality, and cost efficiency to remain competitive. Manufacturing companies are therefore required to minimize waste and optimize production processes. This study analyzes waste reduction in the Original Equipment Manufacturer (OEM) production line at PT Sinar Agung Selalu Sukses, focusing on Chain Wheel Gear (CWG). Between January and July 2025, the production line recorded 9,903 defective units, indicating significant inefficiencies. Lean Manufacturing tools—Value Stream Mapping (VSM), the Borda method, and Fishbone Diagrams—were applied to identify dominant waste and root causes. The analysis revealed a Process Cycle Efficiency (PCE) of 35.9%, below the 50% benchmark, with defect waste identified as the most critical issue. The main contributing factors include material inconsistency, unstable process methods, operator performance, and machine conditions. A 5W+1H-based improvement plan is proposed, including operator mentoring, process standardization, preventive maintenance, and stricter material control. These improvements are expected to reduce defects, shorten lead time, and enhance production efficiency, strengthening competitiveness in Indonesia’s automotive component industry.
PEMANFAATAN POLIMER LDPE (LOW-DENSITY POLYETHELENE) LIMBAH PLASTIK SEBAGAI INHIBITOR KOROSI PADA MATERIAL BAJA JENIS LOW-CARBON ASTMA-53 PADA PIPA MINYAK FRAKSI BERAT Rikki Nababan; Randy Yusuf Kurniawan; Farid Nanda Syanur
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11317

Abstract

Penelitian ini membahas permasalahan korosi pada baja karbon ASTM A53 yang banyak digunakan dalam industri minyak dan gas. Tujuan penelitian adalah menganalisis efektivitas pelapisan berbasis limbah plastik Low Density Polyethylene (LDPE) dalam menurunkan laju korosi pada media air formasi. Metode yang digunakan meliputi preparasi spesimen, sintesis larutan LDPE menggunakan pelarut toluena, proses pelapisan методом pencelupan, serta pengujian korosi menggunakan metode kehilangan massa (weight loss) dengan variasi waktu perendaman. Karakterisasi dilakukan menggunakan FTIR untuk mengidentifikasi gugus fungsi pada lapisan pelindung. Hasil penelitian menunjukkan bahwa pelapisan LDPE mampu menurunkan laju korosi secara signifikan dibandingkan baja tanpa pelapisan, di mana peningkatan massa LDPE menghasilkan perlindungan yang lebih optimal.
Pelapisan Antikorosi berbasis LDPE dari Limbah Kantong Plastik melalui Metode Catalytic Liquefaction Dwi Miftha Kurnia; Randy Yusuf Kurniawan; Muhammad Rifqi Dwi Septian; Rikki Nababan; Pradeha Bnesari Fitrah Lanharto; Ummi Kulsum Hidayati
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11319

Abstract

Penelitian ini mengkaji pemanfaatan polimer LDPE yang berasal dari limbah kantong plastik sebagai inhibitor korosi pada besi. Proses pencairan LDPE dilakukan dengan menggunakan metode Catalytic Liquefaction dengan katalis ZnCl₂ pada suhu 300°C selama 30 menit. Pengujian karakteristik gugus fungsi dilakukan menggunakan spektrofotometer FTIR, sedangkan efektivitas inhibisi korosi dievaluasi melalui metode pengurangan berat (weight loss) dan Electrochemical Impedance Spectroscopy (EIS) dalam media NaCl 3%, NaCl 5%, HCl 3%, dan HCl 5%. Hasil penelitian ini menunjukkan bahwa polimer LDPE mampu secara signifikan menurunkan laju korosi besi. Efisiensi inhibisi tertinggi diperoleh sebesar 76,84% dalam larutan NaCl 5% dengan konsentrasi inhibitor 5 gram. Analisis EIS menunjukkan efektivitas LDPE ditandai dengan nilai total impedansi yang lebih tinggi dibandingkan tanpa penambahan LDPE (8,21 Ω vs. 5,29 Ω). Adsorpsi molekul LDPE pada permukaan logam mengikuti isoterm adsorpsi Langmuir. Penelitian ini menunjukkan potensi besar dalam pemanfaatan limbah plastik sebagai material antikorosi yang ramah lingkungan.
Analisis Sifat Mekanik Tarik Komposit Hybrid Matrik Epoxy Serat Rami (Boehmeria Nivea) Dan Serbuk Genteng. Endar Mukti; Sutrisno; Wahidin Nuriana
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11332

Abstract

Ramie fiber was chosen for its superior mechanical properties and environmentally friendly characteristics as a renewable material, while roof tile powder was used as an inorganic filler to increase stiffness and utilize abundant construction waste. This study aims to analyze the effect of the composition ratio used on the tensile strength of hybrid composites based on natural ramie fiber (Boehmeria Nivea) and roof tile powder with an epoxy matrix, focusing on mechanical testing, namely tensile testing, to analyze the effect of composite material combinations. The research will be conducted using the hand lay-up method, with variations in the volume fraction of epoxy resin (75%) and ramie fiber (0%; 5%; 10%; 15%; 20%; 25%) and roof tile powder (25%; 20%; 15%; 10%; 5%; 0%). The planned mechanical test include several types of test, including tensile test to analyse the effect of composite material combination.
Pengaruh Konsentrasi Perekat Kitosan Terhadap Sifat Fisik dan Mekanik Papan Partikel Tiga Lapis Berbahan Limbah Batang Jagung Untuk Aplikasi Meja Ramah Lingkungan Dicky Setyo Purnomo Dicky; Kardiman; Lilik Astari
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.11427

Abstract

The growing demand for eco-friendly composite materials has driven research into the use of agricultural waste as a substitute for wood-based raw materials. Conventional adhesives such as urea-formaldehyde (UF) and phenol-formaldehyde (PF) contain toxic formaldehyde compounds, making the development of natural alternatives essential. This study investigates the effect of chitosan adhesive concentration and layer arrangement on the physical and mechanical properties of particleboard made from corn stalk (Zea mays L.) waste, intended for environmentally friendly table applications. Corn stalk particles were processed using a hammer mill and bonded with chitosan adhesive at concentrations of 20%, 25%, and 30%. The boards were hot-pressed at 180°C under 30 MPa for 10 minutes and evaluated according to the Japanese Industrial Standard JIS A 5908:2003, covering density, moisture content (MC), water absorption, thickness swelling, Modulus of Elasticity (MOE), and Modulus of Rupture (MOR). Results showed that density values across all treatments (0.46–0.50 g/cm³) met the JIS standard, classifying the boards as medium density particleboard. Moisture content complied with the standard only at 20% and 25% chitosan concentrations. The 30% chitosan concentration yielded the highest mechanical performance (MOE = 654.98 N/mm²; MOR = 2.81 N/mm²), though all treatments fell below the minimum MOE threshold required by the standard. Water absorption and thickness swelling remained high across all treatments, indicating limited dimensional stability.

Page 16 of 17 | Total Record : 165

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