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All Journal Jurnal Teknik Mesin Rotasi Rekayasa Mesin FLYWHEEL : Jurnal Teknik Mesin Untirta Teknika: Jurnal Sains dan Teknologi DINAMIKA Jurnal Ilmiah Teknik Mesin Jurnal Rekayasa Mesin Jurnal Pendidikan Teknik Mesin Turbo : Jurnal Program Studi Teknik Mesin JURNAL DINAMIKA VOKASIONAL TEKNIK MESIN Journal of Energy, Mechanical, Material and Manufacturing Engineering INTEK: Jurnal Penelitian Barometer Jurnal Teknik Mesin Jurnal Mesin Nusantara Malikussaleh Journal of Mechanical Science Technology Al-Ijtima: Jurnal Pengabdian Kepada Masyarakat Jurnal Inovasi Teknologi Terapan Trends in Mechanical Engineering Research Al-Ijtimā: Jurnal Pengabdian Kepada Masyarakat Jurnal Pendidikan Teknik Mesin
Saefuloh, Iman
Jurusan Teknik Mesin Fakultas Teknik Universitas Sultan Ageng Tirtayasa
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences Transportation Other

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Evaluasi Partikel Cangkang Buah Maja Sebagai Filler Pada Komposit Kampas Rem Organik Yuda Permana, Ananto; Ula, Shofiatul; Listijorini, Erny; Saefuloh, Iman; Sudrajad, Agung; Sunardi, Sunardi
Jurnal Inovasi Teknologi Terapan Vol. 3 No. 2 (2025): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v3i2.349

Abstract

The exploration of natural resources as materials for engineering applications is increasingly important, as organic materials offer greater environmental benefits. The Maja fruit, a typical Indonesian plant, has not been fully utilized for engineering purposes, particularly its shells. The goal of utilizing this material is to contribute to sustainable development. In this study, Maja fruit particles were used as a filler in combination with rice husk ash. The particle compositions of Maja fruit were set at 20%, 30%, and 40%, respectively. The composite fabrication process was conducted under cold conditions at a pressure of 30 MPa. The results indicated that an increase in the composition of Maja fruit shell particles led to higher compressive strength in the composite, although this caused a decrease in surface hardness. The optimal composite performance was achieved with a composition of 40% Maja fruit shell particles and 60% epoxy resin, as determined by a weighting method. It was also observed that while the inclusion of rice husk ash tended to reduce compressive strength, it contributed to enhancing the hardness of the composite.
Fatigue Characteritics of Medium Carbon Steel after Heat Treatment Using Sand as Cooling Media Sunardi, Sunardi; Randu, Randu; Listijorini, Erny; Saefuloh, Iman; Notonegoro, Hamdan Akbar; Jannah, Miftahul
INTEK: Jurnal Penelitian Vol 8 No 2 (2021): October 2021
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/intek.v8i2.2817

Abstract

Stress concentrations cause many machine element failures. Failure will occur more rapidly if the machine elements obtain repeated and fluctuating loading. For this reason, the material for machine elements must have better fatigue life. There are various attempts made to increase material life and other mechanical properties. In this study, the research sample used is AISI 4140 steel. The samples obtain hardening followed by cooling and tempering. The hardening temperature is 8500C with a holding time of 17 minutes. The cooling media in this research are dry sand, semi-wet sand, and wet sand. Wet measurements based on volumetric ratios. Semi-wet sand with a ratio of sand and water 4: 1, sandy sand 4: 2. The final process is tempering treatment, with a temperature of 2500C. The material fatigue test refers to the JIS Z 2274 Standard. From this study, the heat treatment given can reduce the fatigue life of the material, even though the hardness increases. The higher the cooling rate, the hardness of the material increases, but the fatigue life is low.
Studi mechanical properties dan struktur mikro hasil variasi temperatur dan waktu aging pada alumunium matrix composite (AMC) hasil proses stir casting dengan kandungan matrix Berlebih Saefuloh, Iman
Jurnal Mesin Nusantara Vol 1 No 2 (2018): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v1i2.13503

Abstract

Alumunium matrix composite (AMC) banyak digunakan sebagai bahan di banyak bidang (otomotif, pertambangan, penerbangan, pertahanan) karena ringan, dipilih sebagai material ini ringan dan relatif murah dan mudah difabrikasi. Proses pembuatan AMC tidak mudah karena matrik dapat membentuk gumpalan. Proses Stir casting dipilih dalam proses ini karena dapat menghasilkan AMC lebih merata dan dapat memecah gumpalan tersebut. Setelah stir casting dilakukan proses perlakuan panas aging agar material hasil lebih baik. Penelitian ini bertujuan menggunakan alumunium sebagai matrik dan senyawa karbida SiC sebagai penguat dengan proses aging suhu 1000C dan 2000C dengan waktu penahanan selama 1, 2, 3 dan 4 jam untuk meningkatkan mechanical properties dan memperbaiki struktur mikro. Setelah melalui proses pengujian didapatkan waktu aging berpengaruh terhadap mechanical properties yang di hasilkan, semakin lama waktu aging semakin besar pula kenaikan mechanical properties, untuk nilai kekuatan tarik naik sampai 70% dan kekerasan naik sampai 31%.
Pengembangan Material Maju Superkonduktor Mg-B dengan Penambahan Graphene Oxide melalui Proses Powder in Sealed Tube Mahendra, Brillian Ardy; Herbirowo, Satrio; Saefuloh, Iman; Handayani, Murni
Jurnal Mesin Nusantara Vol 5 No 1 (2022): Jurnal Mesin Nusantara
Publisher : Universitas Nusantara PGRI Kediri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29407/jmn.v5i1.17894

Abstract

MgB2 is a high possible superconducting material that can be applied quite practically with the functionalization of Mg-B materials. Material development is carried out by adding carbon, namely Graphene Oxide (GO), which is a single atom layered material. The Powder in Sealed Tube (PIST) method is practically used to reduce oxidation. This study aims to analyze the effect of GO material doped with the PIST method made from MgB2 with a sintering temperature of 800℃ for 2 hours on its superconductivity, compound formation, and microstructure. The manufacturing process is carried out in a 1:2 ratio where 98% purity Mg is mixed with Boron, which is then added with 0, 0.3 and 3% wt GO doping, all ingredients are mixed stoichiometrically. The material that has been put in a tube and compacted sufficiently into SS316L which has been closed on one side to enter the powder, is then compacted with high pressure up to 1000 MPa. The material is sintered at a temperature of 800℃ for 2 hours which is then carried out by cooling in the furnace and taking bulk samples. The XRD results showed the formation of the dominant MgB2 phase and the formation of an impurity phase in the form of MgO and obtained a decent crystal size of 295 which was owned by the 3%wt GO PIST MgB2 sample. The SEM test shows the forms of formation (agglomeration) in each sample, with the presence of several axes. Cryogenic testing shows that with doping there is a movement of critical temperature to a lower direction where MgB2 0%wt GO has a TcOnset value of 39.4 K and a TcZero of 38.7 K, while MgB2 3%wt GO has a TcOnset value of 39.6 K and TcZero of 38 K.
RANCANG BANGUN PEMEGANG CAKRAM PADA TRIBOMETER PIN ON DISK BERBASIS MODIFIKASI PADA MESIN BUBUT KONVENSIONAL Abdul Aziz; Iman Saefuloh; Sidik Susilo; Indah Uswatun Hasanah; Daris Miftah Dzaky
Jurnal Pendidikan Teknik Mesin Vol. 8 No. 2 (2021): Jurnal Pendidikan Teknik Mesin
Publisher : Program Studi Pendidikan Teknik Mesin Fakultas Keguruan dan Ilmu Pendidikan Universitas Sriwiajaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36706/jptm.v8i2.15489

Abstract

Perancangan merupakan sebuah langkah awal dalam merealisasikan suatu produk yang dibutuhkan untuk mempermudah suatu pekerjaan atau kegiatan manusia. Tribometer atau Pin-On-Disk merupakan alat dari tribotester yang di gunakan untuk mengetahui gesekan dan keausan suatu bahan material yang saling bersentuhan. Dikarenakan alat Pin on disk membutuhkan biaya yang cukup mahal dan belum adanya uji keausan dengan memodifikasi mesin bubut. Maka dari itu penelitian ini bertujuan merancang pemegang cakram atau disk dengan memodifikasi mesin bubut konvensional sebagai alat pengganti Pin on Disk. Hasil pengujian ini diperoleh diameter poros yang cukup aman digunakan untuk pemegang cakram adalah 40 mm dan hasil pengujian keausan diperoleh nilai faktor keausan terbesar pada stainless steel 316 dengan beban 2 kg tanpa pelumas yaitu 0,000098 (mm³/N.m). Sedangkan untuk beban 3 kg diperoleh nilai faktor keausan terbesar terjadi pada pengujian tanpa pelumas sebesar yaitu 0,0003215 (mm³/N.m). Dan untuk nilai faktor keausan terkecil terjadi pada pembebanan 2 kg dengan pelumas SAE 40 adalah 0,0001006 (mm³/N.m)
Microstructure Features and Degradation Mechanisms of Low-Pressure Evaporator Tube Steels in Combined Cycle Power Plants Nugraha, YangYang Gilang; Erwin, Erwin; Listijorini, Erny; Dwinanto, Dwinanto; Alhamidi, Ahmad Ali; Satria, Dhimas; Saefuloh, Iman; Yusuf, Yusvardi; Sunardi, Sunardi
FLYWHEEL : Jurnal Teknik Mesin Untirta Vol 10, No 2 (2024): October
Publisher : Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fwl.v10i2.39002

Abstract

A leakage failure occurred in a low-pressure evaporator tube of a Heat Recovery Steam Generator (HRSG) in a combined cycle power plant. The failed tube, manufactured from ST 37.8 CL1 steel, was investigated to determine the root cause of failure. The analysis included visual inspection, metallographic examination, and hardness testing. Visual observation revealed localized leakage regions associated with material degradation. Metallographic analysis showed a ferrite–pearlite microstructure with pronounced pearlite growth and the presence of micro-cavities concentrated along grain boundaries. Hardness measurements indicated that the failed tube exhibited higher hardness values (average 83.3 HRB) compared to unused material (average 76.6 HRB), reflecting microstructural evolution during service. The tube operated at approximately 143.8 °C under continuous internal pressure. Long-term exposure to these conditions promoted creep damage, characterized by the nucleation of micro-cavities at ferrite–pearlite interfaces. Progressive cavity growth and coalescence reduced ductility and facilitated crack initiation, ultimately leading to leakage. The findings demonstrate that creep-induced cavity formation associated with pearlite growth was the primary failure mechanism of the low-pressure evaporator tube.
Pengaruh Perendaman Bambu Dengan Air Laut Terhadap Kekerasan dan Laju Keausan Komposit Kampas Rem Sunardi Sunardi; Hermawan Susanto; Rina Lusiani; Iman Saefuloh; Hamdan Akbar Notonegoro; Moh. Fawaid
TURBO [Tulisan Riset Berbasis Online] Vol 12 No 1 (2023): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v12i1.2444

Abstract

Bamboo is a natural material that is widely found in South Banten. Using bamboo as an alternative material for manufacturing brake pads is interesting to research. Bamboo resistance to attacks of organisms is so low that it is necessary to give initial treatment. Preservation of bamboo sticks is done by soaking them in seawater. This immersion is determined for 15 and 30 days. The comparison of the composite constituent composition is 30% bamboo fiber, 28% bamboo particles, 2% zinc, and 40% epoxy resin. Compaction pressure is carried out by 400 kg/cm2 for 10 minutes. The sintering process is carried out at a temperature of 150 °C for 60 minutes. From this research, it is known that the immersion of bamboo stems in seawater tends to decrease the hardness and the wear rate of composites.
Pengaruh Kandungan Partikel Cangkang Telur Terhadap Kekerasan dan Kekuatan Lentur Komposit Epoksi Setelah Paparan Panas Anugrah Surya Arya Pranata; Shofiatul Ula; Iman Saefuloh; Agung Sudrajad; Ahmad Ali Alhamidi; Sunardi Sunardi
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 1 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i1.411

Abstract

Heat exposure can influence the changes in hardness and flexural strength of composites made from eggshell particles and bamboo fibers. The composite samples were prepared through cold compaction at 5 MPa for 2 hours. The materials were combined based on the following volume fractions: 50% epoxy resin, 10% alumina, 10% graphite, 5% zinc oxide (ZnO), and a 25% mixture of eggshell particles and bamboo fibers. The composite samples were then heated to 200°C for 1 hour. The final step involved curing, which required heating the samples in an electric oven at 150°C for 1 hour. Using a weighting method, the composite containing 25% eggshell particles achieved the optimal result, with a multi response performance index (MRPI) of 42.43. This composite exhibited hardness, modulus of elasticity (MOE), modulus of rupture (MOR), and strain values of 70.24 Shore D, 37.65 MPa, 8.58 MPa, and 0.78%, respectively. Conversely, the sample with 25% bamboo fiber and no eggshell particles demonstrated the highest flexural strength at 12.06 MPa, while the sample containing 25% eggshell particles recorded the highest hardness of 70.24 Shore D.
Assessment of Carbon Black Weight Fraction on the Shear Strength of Polyurethane Adhesive Joints Muhamad Erlan Fahrizal; Sunardi Sunardi; Iman Saefuloh; Shofiatul Ula; Dwinanto Dwinanto; Irfan Santosa
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.450

Abstract

Adhesive bonding has become one of the most widely used joining techniques in engineering due to its ability to provide uniform stress distribution, minimize structural weight, and avoid the thermal distortion during welding processes. This study examines the effect of carbon black weight fraction on the shear strength of aluminum single-lap joints bonded with polyurethane adhesive. Aluminum 6061 specimens were prepared following ASTM D1002 standards and were reinforced with carbon black at weight fractions of 0, 8, 16, and 24 wt%. Fourier Transform Infrared (FTIR) spectroscopy was conducted to identify any chemical interactions, and lap shear testing was performed using a Universal Testing Machine (UTM). The results indicated that increasing the weight fraction of carbon black enhanced the shear strength and gradually shifted the failure mode from adhesive failure to cohesive failure. The specimen containing 24 wt% of carbon black exhibited the highest shear strength of 2.81 MPa, with 88% of the failures occurring cohesively. FTIR analysis revealed that carbon black did not introduce any new functional groups but functioned as a physical reinforcing filler within the polyurethane matrix. Therefore, carbon black is an effective reinforcing material for improving the mechanical performance of polyurethane adhesive-bonded aluminum single-lap joints.
Impact of Palm Frond Particle Size on the Characteristics of Biodegradable Particleboard Yudis Rahma Risky; Sunardi Sunardi; Shofiatul Ula; Iman Saefuloh; Yusvardi Yusuf; Agung Sudrajad; Saifudin Saifudin
Jurnal Inovasi Teknologi Terapan Vol. 4 No. 2 (2026): Jurnal Inovasi Teknologi Terapan
Publisher : Politeknik Manufaktur Negeri Bangka Belitung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33504/jitt.v4i2.452

Abstract

Particleboard is a composite material based on lignocellulose that can be produced from agricultural waste, serving as an alternative to traditional wood products. This study utilized waste from oil palm fronds and empty fruit bunches as raw materials for the production of particleboard. The oil palm fronds were processed into filler particles of varying sizes: 80-mesh, 60-mesh, and 35-mesh. The composition of the raw materials included 50% oil palm frond particles, 15% empty fruit bunch fiber, 20% PVAc adhesive, and 15% epoxy resin. The particleboard was manufactured using a single-punch cold-press process at a pressure of 0.30 MPa for 120 minutes, followed by curing at 150°C for 60 minutes. Various characteristics of the particleboard were tested, including density, water content, thickness swelling, modulus of rupture (MOR), and modulus of elasticity (MOE). The results indicated that the particle size of 80-mesh yielded the best properties, with a density of 0.88 g/cm³, a water content of 5.51.6%, thickness swelling of 1.13%, a MOR of 19.79 MPa, and a MOE of 1.08 GPa. All specimens met the standards set by SNI 03-2105-2006 for density, water content, thickness swelling, and MOR; however, the MOE value did not meet the required standards.
Co-Authors Abda Abda Abdurrofi Zahrawani Achmad, Zainuri Agung Sudrajad Agus Pramono Ahmad Ali Alhamidi Ahmad Bahrul Ulum Ahmad Rifa’i Alhamidi, A. Ali Alhamidi, Ahmad A Alhamidi, Ahmad Ali Anugrah Surya Arya Pranata Aris Munandar Aswata Aswata Aziz, Abdul Bintang Adjiantoro Brian Laksana Gemilang Burhani, Ichwan Daris Miftah Dzaky Deprilen Dacha Dhimas Satria Dwinanto Dwinanto Dwinanto Dwinanto Dwinanto, Dwinanto Edwin Prasetya Eko Surjadi Erni Listijorini Erny Listijorini Erwin, Erwin Gilang Aji Prayoga Hamdan Akbar Notonegoro Hamdan Akbar Notonegoro Haryadi Haryadi Haryadi Haryadi Haryadi Haryadi Haryadi Haryadi Haryadi Haryadi Haryadi Haryadi Haryadi Hermawan Susanto Hesti Istiqlaliyah Hidayat, Rahmat Imron Rosyadi Imron Rosyadi Indah Uswatun Hasanah Ipick Setiawan Ipick Setiawan Ipick Setiawan Ipick Setiawan Ipik Setiawan Irfan Santosa Jannah, Miftahul Latief, Muhamad Listijorini , Erny Listijorini, Erny Lusiani, Rina Lusiani, Rina Mahendra, Brillian Ardy Maulana Fazdri Miftahul Jannah Miftahul Jannah Moh Fawaid Muhamad Erlan Fahrizal Muhamad Rizki Mutaqien Muhamad, Ardani Muhammad Gema Winisuda Muhammad Nurul Huda Mujahid Mujahid Murni Handayani Ni Ketut Caturwati, Ni Ketut Notonegoro, Hamdan Akbar Notonegoro, Hamdan Akbar Nufus Kanani Nugraha, YangYang Gilang Nurwijayanti Oetomo, Pandoe Satria Panji Setyo Aji Permana Pinem, Mekro Pinem, Mekro Permana Putra, Rizky Kurnia Putra, Styven Handoyo Randu, Randu Rhaka Qudzsy Wening Praja Ricki Hikmatullah Rina Lusiani Rispan, Wahyu Rohmat, Agus Rosyadi , Imron Rosyadi, Imron S Sunardi S Suryana Saifudin salman, Salman Satrio Herbirowo, Satrio Shafnur Hamdi Shofiatul Ula Sidik Susilo sinarep, Sinarep Slamet Wiyono Slamet Wiyono Sudrajad, Agung Sunardi Sunardi Sunardi, Sunardi Sunardi, Sunardi Sunardi, Sunardi Suryana, Suryana Syarif Abdullah Ula, Shofiatul Wahyudi, Hadi Wijoyo Wijoyo Wijoyo Wijoyo Willy Jamaludin Wiyono , Slamet Yuda Permana, Ananto Yudis Rahma Risky Yusuf , Yusvardi Yusuf, Yusvardi Yusvardi Yusuf