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All Journal Jurnal Rekayasa Mesin AUSTENIT SITEKIN: Jurnal Sains, Teknologi dan Industri FLYWHEEL : Jurnal Teknik Mesin Untirta Jurnal Geocivic Indonesian Journal of Engineering and Science (IJES) Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) Jurnal Pelita Sriwijaya
Amir Arifin
Jurusan Teknik Mesin, Fakultas Teknik, Universitas Sriwijaya
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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INTERGRANULAR CORROSION AND DUCTILE-BRITTLE TRANSITION BEHAVIOUR IN MARTENSITIC STAINLESS STEEL Gunawan Gunawan; Amir Arifin
Indonesian Journal of Engineering and Science (IJES) Vol. 2 No. 3 (2021): Table of Contents
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/ijes.v2i3.23

Abstract

Material mechanical behavior is critical for both safety and economic considerations. Because engineering items are manufactured using appropriate grade materials, mechanical approval of the materials used must be completed before assembly. Petrochemicals, marine, and biomaterials are just a few of the industries that use stainless steel. Despite its extensive use, structural failure is still frequently caused by inadequate stainless steel type selection. As a result, dangerous conditions, resulting in personal harm or financial loss. Dangerous conditions is might result in accidents, resulting in personal injury or financial loss. Martensite stainless steel is a type of stainless steel with a high strength value but is brittle, necessitating careful handling. Intergranular corrosion, sensitization, tempering heat treatment, and the Ductile to Brittle Transition Temperature (DBTT) are topics still working on Martensite stainless steel for researchers.
WELDING ANALYSIS OF GRAY CAST IRON ASTM A48 CLASS 40 USING SMAW Diah Kusuma Pratiwi; Amir Arifin; Reza Andre Suhada
Indonesian Journal of Engineering and Science (IJES) Vol. 2 No. 3 (2021): Table of Contents
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/ijes.v2i3.26

Abstract

The mechanical and physical characteristics of gray cast iron are intricately bound to its application as an essential material in manufacturing various goods. SMAW (Shielded Metal Arc Welding) is the most simple and widely used electric arc welding method. In this work, ASTM A48 gray cast iron Class 40 was joining using the SMAW method with the welding position used was 1G or underhand position. The joining used is the Butt Joint using an open Singel V seam with a current of 120A. The joining of Welding was characterized through dye penetrant and hardness tests. Rockwell hardness tests on base metal and heat affected zone reveal that the heat affected zone has the highest hardness value of 56.5 HRC, while the base metal has the lowest hardness value (41 HRC). Graphite, pearlite, and pearlite were all visible in the microstructure study.
PEMANFAATAN BOILER MINI HEMAT ENERGI BERBAHAN BAKAR LIMBAH SERBUK GERGAJI DAN LIMBAH AMPAS TEBU UNTUK MEMASAK PADA INDUSTRI RUMAH TANGGA ISMAIL THAMRIN; IRSYADI YANI; GUNAWAN GUNAWAN; AMIR ARIFIN; NUKMAN NUKMAN; BARLIN BARLIN; DEWI PUSPITASARI; ASTUTI ASTUTI; DIAH KUSUMA PRATIWI; NURHABIBAH PARAMITHA EKA UTAMI
Jurnal Lentera Nusantara Vol 2 No 1 (2023): Jurnal Pelita Sriwijaya
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/jps.v2i1.114

Abstract

Boiler mini ini dapat juga berfungsi sebagai tungku masak biasa, yang sering digunakan masyarakat dengan menggunakan kayu sebagai bahan bakarnya. Bedanya boiler ini menggunakan limbah dari serbuk kayu dan ampas tebu sebagai bahan bakarnya. Cara kerja tungku ini menggunakan tekanan uap yang dihasilkan dari tangki air yang terdapat dalam tungku. Tekanan uap ini mendorong bahan bakar alternatif yang digunakan untuk langsung masuk kedalam ruang bakar. Kita hanya perlu mengontrol tingkat level air yang ada didalam tungku, agar tekanan uap yang dihasilkan selalu dalam kondisi tinggi. Dengan jumlah kalori bahan bakar yang sama, tungku ini dapat menghemat pengeluaran untuk membeli kayu.
PENYULUHAN PEMBUATAN KOPRA KEPADA IBU-IBU PKK KELURAHAN KARANGJAYA KECAMATAN GANDUS PALEMBANG Pratiwi, Diah Kusuma; Gunawan, Gunawan; Arifin, Amir; Eka Utami, Nurhabibah Paramitha; Prakoso, Akbar Teguh; Saputra, M. A. Ade; Kaprawi, Kaprawi; Chandra, Hendri; Ellyanie, Ellyanie; Sipahutar, Riman
Jurnal Lentera Nusantara Vol 3 No 1 (2024): Jurnal Pelita Sriwijaya: in progress
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/jps.v3i1.135

Abstract

Indonesia adalah salah satu negara penghasil kelapa terbesar di dunia. Kelapa merupakan bahan baku pembuatan minyak yang dipergunakan untuk berbagai keperluan. Kelapa diolah menjadi kopra yang bertujuan untuk mengurangi kandungan uap air dan menambah ringan, dan meningkatkan kandungan minyak didalamnya.Salah satu daerah di Palembang yang banyak terdapat kelapa adalah Kelurahan Karang Jaya Kecamatan Gandus. Penyuluhan cara mengolah kelapa dilakukan kepada ibu-ibu PKK dan penduduk dengan cara ceramah, diskusi, dan pemutaran video-video. Kegiatan ini telah berhasil dengan baik yang ditunjukkan oleh antusiasme peserta penyuluhan untuk belajar mengolah kelapa menjadi kopra dan nilai hasil evaluasi yang cukup signifikan.
Optimization of Hardness Improvement of Bucket Wheel Excavator (BWE) Trackplate Bushing Material Based on the Taguchi Method Hendryanto, Refdinal Latif; Hendryanto, Refaldy Yusuf; Arifin, Amir
SITEKIN: Jurnal Sains, Teknologi dan Industri Vol 22, No 1 (2024): December 2024
Publisher : Fakultas Sains dan Teknologi Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/sitekin.v22i1.33221

Abstract

trackplate’s bushing material made of AISI 4340 steel through heat treatment designed using the Taguchi method. The heat treatment process includes several key parameters, namely austenitizing temperature, austenitizing time, quenching media, and tempering time, which are systematically evaluated to maximize the increase in material hardness. The experimental design employs the Taguchi method with an L9 orthogonal array to determine the optimal combination of parameters from four factors and three levels of variables, including austenitizing temperatures of 870°C, 900°C, and 925°C; austenitizing times of 25, 30, and 35 minutes; quenching media of water, salt water, and oil; and tempering times of 1.5, 2, and 2.5 hours. Hardness testing conducted using the Rockwell HRC scale shows that the optimal combination is achieved at an austenitizing temperature of 925°C, an austenitizing time of 35 minutes, salt water as the quenching media, and a tempering time of 2.5 hours. This combination successfully increases the material hardness to 56.9 HRC, representing an increase of 67.84% from the initial hardness of 33.9 HRC. S/N ratio analysis reveals that quenching media and austenitizing temperature significantly impact the increase in hardness. At the same time, tempering time plays a role in stabilizing the martensitic structure without reducing the achieved hardness. The results of this study demonstrate that the Taguchi method effectively determines the optimal heat treatment parameters for bushing materials, thus producing material hardness that meets the required technical specifications.Keywords: AISI 4340 Steel, bushing, hardness improvement, heat treatment, Taguchi method, S/N ratio analysis.
PENERAPAN MODEL QUANTUM LEARNING UNTUK MENINGKATAKAN HASIL BELAJAR SISWA PADA PEMBELAJARAN IPS PADA POKOK BAHASAN KEDUDUKAN DAN PERAN ANGGOTA KELUARGA SISWA KELAS III SD NEGERI 81 KOTA TERNATE Arifin, Amir
Jurnal GeoCivic Vol 7, No 2 (2024): EDISI OKTOBER
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/geocivic.v7i2.9053

Abstract

This type of research is classroom action research (PTK). The research was carried out in two cycles, each cycle consisting of four stages, namely planning, implementation, observation, reflection. The research subjects were class II students at SD Negeri 81 Ternate City, totaling 32 students consisting of 17 girls and 15 boys. Data collection was carried out through observation, tests, and documentation. The data collection instruments used are observation sheets, test assessment guidelines, and documentation. Data analysis techniques are descriptive qualitative and quantitative.In cycle I all actions can be carried out according to the action plan. Of the 32 students who completed, 12 students or 37.5, while 22 students or 62.5 did not complete. So an average of 65.5 can be obtained (cycle I). Meanwhile, in cycle II with the same material, all actions were carried out according to the action plan. This is proven by the number of 32 students who completed as many as 24 students or 75.0 while those who did not complete were 8 students or 25.0 with an average of 83.75 (cycle II). Meanwhile, the results of student learning activities were with a percentage of 67.5 (cycle I) and 85.0 (cycle II) and the results of teacher activities were with a percentage of 65.0 (cycle I) and 84.61 (cycle II). The results of the research show that the application of the QL (Quantum Learning) model is to improve student learning outcomes in social studies learning on the subject of the position and role of family members of class II students at SD Negeri 81 Ternate City.
THE OPTIMIZATION OF STAINLESS STEEL 304 AND 316 WELDED JOINTS ON CORROSION RATE BY THE TAGUCHI METHOD Wijaya, Muhammad Agus; Arifin, Amir; Gunawan, Gunawan
Indonesian Journal of Engineering and Science Vol. 6 No. 1 (2025): Table of Contents
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/ijes.v6i1.150

Abstract

The Water Treatment Plant (WTP) is a water purification system designed to meet the water demands for power generation and operational requirements in the petrochemical industry. The current pipeline network in the Demin Plant unit employs carbon materials with rubber cladding, which presents drawbacks, such as extended recovery times during system failures. To address the issue, the research explored welding SS 304 and SS 316 materials as an alternative to the existing carbon pipes with rubber cladding. The study utilized the Taguchi experimental design method, employing an orthogonal array (L9) table to optimize quality improvement while minimizing costs. The experiment included 9 test specimens with three repetitions, examining four welding parameters, each with three levels. Variance (ANOVA) was analyzed using the Minitab software and manual calculations in Microsoft Excel. The results indicated that the factors influencing the corrosion rate of the specimens include the welding method, electrode type, welding speed, and welding current. ANOVA results showed that the welding method (F-value = 5.9176) and welding current (F-value = 8.3492) significantly affected the corrosion rate, whereas the electrode type (F-value = -3.5949) and welding speed (F-value = -2.8321) did not. A confirmation experiment yielded an optimal corrosion rate of 3.0231 mm/y, lower than experiment number 7.
FEASIBILITY ANALYSIS OF HALF BEAD TECHNIQUE TO REPLACE POST-WELD HEAT TREATMENT IN WELDING A335 GRADE P22 PIPES Haryadi, Haryadi; Arifin, Amir
Indonesian Journal of Engineering and Science Vol. 6 No. 1 (2025): Table of Contents
Publisher : Asosiasi Peneliti Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51630/ijes.v6i1.151

Abstract

This work evaluates the feasibility of using the Temper Bead Welding (TBW) method with the Half Bead technique as an alternative to Post-Weld Heat Treatment (PWHT) for welding A335 Grade P22 pipes. Three treatment methods were compared: preheating, preheating with TBW, and preheating with PWHT. Hardness testing is carried out using the Vickers microhardness testing method. The only preheat method showed the highest hardness values in the HAZ (342 HV), fusion zone (357 HV), and weld metal (334 HV). TBW with the half bead technique had higher hardness only in the base metal (191 HV). PWHT provides the most uniform hardness distribution, effectively relieves residual stresses, and homogenizes the microstructure. TBW reduced HAZ size by 50% more than preheating. The microstructure observed in all methods was ferrite and pearlite, with differences mainly in grain size. Although TBW is a viable alternative for repair, this method is unsuitable for application in early fabrication processes.
Palm Stearin as Alternative Binder for MIM: A Review Arifin, Amir; Sulong, Abu Bakar; Gunawan, Gunawan; Mohruni, Amrifan Saladin; Yani, Irsyadi
Journal of Ocean, Mechanical and Aerospace -science and engineering- Vol 7 No 1 (2014): Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse)
Publisher : International Society of Ocean, Mechanical and Aerospace -scientists and engineers- (ISOMAse)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36842/jomase.v7i1.496

Abstract

Palm stearin is one of the fractionation process results from palm oil that is the largest commodities in the world. It has potentially as an alternative of binder in metal injection molding based on researches that conducted in Malaysia. Palm stearin can be combined with other binder to be a binder system with the function as lubricant and surfactant in a binder system. Based on experiments showed Palm stearin has fulfilled requirement as binder in MIM such as pseudoplastic behavior from rheological test and homogeneity of the feedstock. Palm stearin can replace conventional binders that commonly used in industry.
Studi Pengembangan Komposit Al/Al2O3 Berpori dengan Space Holder Latex terhadap Sifat Mekanik dan Fisik Gunawan, Gunawan; Sofyana, Reni; Arifin, Amir
Jurnal Rekayasa Mesin Vol. 22 No. 1 (2022): Jurnal Rekayasa Mesin
Publisher : Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jrm.v22i1.329

Abstract

Composite materials are combinations of multiple or more ingredients that have different materials used for materials and materials that have pores produced from space holder material. This study aims to identify aluminum metal as aluminum metal (aluminum metal foam) to the mechanical properties and physical properties (density and porosity) with the same temperature and holding time. Fabrication method is powder metallurgy, with compacting of 100 kg/cm2 and using a sintering temperature of 5000C with a holding time of 2 hours. Tests and observations made were Thermo Graviemetric Analysis (TGA) to determine the process of decreasing space space holder, X-Ray Diffraction (XRD) to characterize crystalline phases formed, test Density, Scanning Electron Microscopy (SEM).
Co-Authors Abu Bakar Sulong, Abu Ahmad Irham Jambak Amrifan Saladin Mohruni ASTUTI ASTUTI Barlin Barlin BARLIN BARLIN Buana Candra Mangku Dendy Adanta DEWI PUSPITASARI Diah Kusuma Pratiwi Diah Kusuma Pratiwi Diah Kusuma Pratiwi Eka Utami, Nurhabibah Paramitha Ellyanie Ellyanie GUNAWAN GUNAWAN Gunawan Gunawan Gunawan Gunawan Gunawan Gunawan Gunawan Gunawan Gunawan Gunawan Haryadi - helena astari Hendri Chandra Hendryanto, Refaldy Yusuf Hendryanto, Refdinal Latif IRSYADI YANI Irsyadi Yani ISMAIL THAMRIN Ismail Thamrin Junaidi Junaidi Kaprawi Kaprawi M Hendrianto MS, Firdaus Muhamad Machrus Muhammad Dahlan Nukman NUKMAN NUKMAN NURHABIBAH PARAMITHA EKA UTAMI Prakoso, Akbar Teguh Pratiwi, Diah K. Reza Andre Suhada Riman Sipahutar Saputra, M. A. Ade Sofyana, Reni Sulong, Abu Bakar Surya Adi Chandra Tommy Sulistyawan Wijaya, Muhammad Agus Zambri Harun, Zambri