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All Journal Rotasi Rekayasa Mesin Jurnal Desiminasi Teknologi Arena Hukum Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin INDONESIAN JOURNAL OF APPLIED PHYSICS JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) Az Zarqa': Jurnal Hukum Bisnis Islam Cantilever: Jurnal Penelitian dan Kajian Bidang Teknik Sipil Jurnal Vokasi Mekanika Jurnal Lingkungan Binaan Indonesia Metalurgi Jurnal Polimesin
Ari Siswanto, Ari
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Religion Aerospace Engineering Arts Humanities Astronomy Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation

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PENGARUH VARIASI TEMPERATUR FURNANCE BRAZING TERHADAP SIFAT MEKANIK DALAM PEMBUATAN GRINDING ROLL MATERIAL FCD 500 DAN NI-HARD1 Siswanto, Ari; Hanaldi , Kus; Purwadi , Wiwik; Nadi, M. Rizki Gorbyandi
Jurnal Rekayasa Mesin Vol. 15 No. 2 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i2.1639

Abstract

This research was conducted on nodular cast iron FCD 500 and white cast iron Ni-Hard1 in the manufacturing of grinding rolls. These rolls were joined together using the furnace brazing method, with CuZn 35 filler metal placed between the two parent metals. The pressure applied in this experiment was 26,000 N using a pressure aid. The assembled parts of the grinding rolls were heated in a muffle furnace with temperature variations of 900, 950, and 1000 °C, with a holding time of 120 minutes. The results of the furnace brazing process revealed that the grinding roll sample achieved the highest shear strength at a temperature of 900 °C, with a shear strength of 6.52 MPa. The observed low shear strength is due to the penetration bonding between the metals. This was confirmed by the line analysis test, which indicated no diffusion process occurring between the metals. As the holding temperature of the brazing furnace increased, the shear strength decreased, primarily due to the melting of the CuZn 35 metal at temperatures above 900 °C, resulting in micro porosity. During the furnace brazing process, changes were observed in the microstructure of the FCD 500 parent metal. There was an increase in the amount of pearlite fraction, which in turn increased the hardness value. Additionally, the microstructure of Ni-Hard1 changed from austenite to martensite, leading to an increase in the hardness value.
Pengaruh temperatur terhadap struktur mikro dan sifat mekanik dalam proses fussion brazing Ni-Hard 4 dengan S45C menggunakan CuZn 35 sebagai logam pengisi. Siswanto, Ari; Purwadi, W.
Dinamika Teknik Mesin Vol 10, No 1 (2020): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v10i1.309

Abstract

This research was conducted on white cast iron (Ni-Hard 4) and medium carbon steel (S45C) cast iron materials using a thin brass plate (CuZn 35) 0.3 mm as filler metal by heating at temperatures of 850 to 1050 0C for 120 minutes with a pressure of 2 Mpa in the muffle furnace. The effect of temperature on the microstructure was observed using an optical microscope and scanning electron microscopy equipped with energy dispersive X-ray system (EDS) to determine the chemical composition that occurred between the three meterial layers. The thickness of the interface layer increases with increasing holding temperature. The highest shear strength (79.86 Mpa) was obtained at a temperature of 950 0C.
Struktur Unik Candi Muaro Takus, Riau Siswanto, Ari; Ardiansyah
Jurnal Lingkungan Binaan Indonesia Vol. 9 No. 4 (2020): JLBI
Publisher : Ikatan Peneliti Lingkungan Binaan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (784.676 KB) | DOI: 10.32315/jlbi.v9i4.75

Abstract

Kompleks percandian Muara Takus memiliki empat candi yang berdekatan tetapi mempunyai langgam arsitektur dan dimensi yang berbeda. Material utama candi adalah batu bata dan batu pasir dengan menggunakan kombinasi yang berbeda sehingga dapat menghasilkan struktur candi yang berbeda dengan candi lainnya di Sumatera. Penggunaan material batu bata dan batu pasir yang memiliki karakter dan ukuran yang berbeda selain memunculkan permasalahan tetapi juga menciptakan suatu keunikan pada bentuk dan detail candi. Metode studi kasus yang dipergunakan dengan kegiatan penelitian yang meliputi observasi, pengukuran, penggambaran serta wawancara. Keempat candi yaitu Tuo, Bungsu, Mahligai dan Palangka menggunakan kombinasi batu bata dan batu pasir yang berbeda serta pada bagian candi yang berbeda. Bentukan stupa menara dari candi Mahligai yang menggunakan sebagian besar batu bata dan sedikit batu pasir menimbulkan kesan unik yang elegan. Penggunaan batu bata dan batu pasir secara bersamaan atau terpisah di kompleks percandian Muaro Takus telah menghadirkan karya arsitektur candi Buddha dengan struktur yang unik dan menawan.
Tata Spasial Candi Bahal I, II dan III di Padang Lawas Utara, Sumatera Utara Siswanto, Ari; Ardiansyah; Wargadalem, Farida R.; Indriastuti, Kristantina
Jurnal Lingkungan Binaan Indonesia Vol. 9 No. 3 (2020): JLBI
Publisher : Ikatan Peneliti Lingkungan Binaan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32315/jlbi.v9i3.107

Abstract

Situs percandian Bahal di Padang Lawas Utara yang terdiri dari tiga kompleks yang berdekatan memberikan gambaran pola tata spasial yang terkait dengan lingkungannya. Masing-masing kompleks percandian memiliki tata spasial yang berbeda karena jumlah massa yang berbeda. Tujuan penelitian adalah mengkaji tata spasial kompleks percandian Bahal I, II dan III serta menganalisis keterkaitannya dengan karakteristik candi. Penelitian kualitatif dengan pendekatan studi kasus digunakan melalui kegiatan observasi, pengukuran, penggambaran dan wawancara di lapangan. Layout candi Bahal I, II dan III membentuk konfigurasi massa dan spasial yang jelas. Ketiga kompleks percandian tersebut menunjukkan axis yang kuat serta hierarkhi yang jelas berdasarkan pada jumlah massa candi Perwara dan dimensi candi utama. Axis yang terbentuk dari pola tata spasial telah mempertegas candi sebagai bangunan suci yang memiliki formalitas dan keseimbangan yang sangat kuat.
Perubahan Orientasi Permukiman Tepi Sungai sebagai Pengaruh Eksistensi Sungai Musi Palembang Wicaksono, Bambang; Siswanto, Ari; Kusdiwanggo, Susilo; Anwar, Widya Fransiska Febriati
Jurnal Lingkungan Binaan Indonesia Vol. 8 No. 3 (2019): JLBI
Publisher : Ikatan Peneliti Lingkungan Binaan Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32315/jlbi.v9i3.126

Abstract

Eksistensi Sungai Musi pada awalnya menjadi orientasi bangunan rumah yang menghadap ke sungai. Ruang air mulai di persempit dengan kehadiran bangunan baru yang menempati area diatas lahan yang tertutup air. Perubahan budaya sungai ke darat berpengaruh kepada kehadiran bangunan baik yang lama maupun yang baru. Hal ini menyebabkan hilangnya potensi lokal dan identitas arsitektur lokal dan berakibat hilangnya eksistensi sungai tersebut. Tujuan penelitian ini untuk mengetahui pengaruh eksistensi sungai Musi dalam perubahan orientasi permukiam tepi sungai dari ruang air ke ruang darat. Untuk mencapai tujuan tersebut, studi mengidentifikasi jejak arsitektur permukiman, mengekplorasi aktivitas dan gagasan masyarakat tepian sungai. Pengumpulan data dilakukan melalui observasi lapangan, wawancara mendalam, dan studi pustaka. Analisis dilakukan secara kualitattif terhadap variabel, orientasi, posisi, bentuk, dan tata letak hunian tepi sungai. Hasil menunjukkan bahwa sebagian besar rumah tepian sungai yang dibangun pada area aliran anak sungai masih memiliki orientasi ke sungai. Sedangkan rumah yang dibangun pada area yang dekat dengan jalan bergeser lebih orientasi ke darat. Studi menyimpulkan bahwa Perubahan orientasi permukiman tepian sungai disebabkan oleh perubahan eksistensi Sungai Musi Palembang.
Investigation of Failure Mechanisms in the U-Bend Tubes of Shell and Tube Heat Exchangers Achyarsyah, Mochamad; Hanaldi, Kus; Purwadi, Wiwik; Hermana, Gita Novian; Siswanto, Ari; Ruskandi, Cecep; Nadi, Muhammad Rizki Gorbyandi
Metalurgi Vol 39, No 3 (2024): Metalurgi Vol. 39 No. 3 2024
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2024.775

Abstract

The U-bend tubes of a shell-and-tube heat exchanger made of SA-234 Grade WPB carbon steel failed prematurely within 14 days after replacement and welding. This study investigates failure mechanisms through an integrated failure analysis that includes visual inspection, dye penetrant testing, chemical composition analysis, hardness measurements, and microstructural characterization. The results reveal that the tube contained 0.324 wt.% C, exceeding the maximum limit specified by the standard, which promoted the formation of Widmanstätten ferrite and reduced toughness. The welded joint exhibited multiple defects, including porosity and lack of fusion, which acted as stress concentration sites. Hardness measurements showed average values of 205 HV in the weld metal, 199 HV in the HAZ (heat-affected zone), and 184 HV in the base metal. Under operating conditions of 275 °C and 58.48 barg, these defects progressively opened, leading to fluid leakage. The escaping high-pressure fluid accelerated erosion-corrosion, as evidenced by oxygen-rich corrosion products detected by EDS analysis. The findings demonstrate that the combined effects of material non-compliance, poor welding quality, and unfavorable microstructural evolution governed the premature failure. This study provides quantitative insights to improve welding practices and material selection, thereby enhancing the reliability of U-bend tubes in shell-and-tube heat exchangers.
The Analisis Pengaruh Arus Listrik Pada Proses Pengelasan Tig Terhadap Kekuatan Sambungan Las Material Logam Aluminium 6061 Khalilullah, Ilham; Gunawan, Iwan; Siswanto, Ari
JTRM (Jurnal Teknologi dan Rekayasa Manufaktur) Vol 7 No 2 (2025): Volume: 7 | Nomor: 2 | Oktober 2025
Publisher : Pusat Penelitian dan Pengabdian kepada Masyarakat (P3M) Politeknik Manufaktur Bandung (Polman Bandung)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.48182/jtrm.v7i2.189

Abstract

The selection of current in aluminum welding has a significant impact on the quality of the weld joint. Too high a current can cause increased penetration, potential distortion and the risk of overmelting. On the other hand, too low a current can produce a weak weld joint, lack of penetration, and increase the risk of porosity formation. The main focus of this study is to understand the effect of current variations in the Tungsten Inert Gas (TIG) welding process on the strength of 6 mm thick aluminum 6061 welds and using ER4043 filler. The tensile strength and flexibility of the weld joint are very important in construction because they determine the strength, stability, and toughness of the joint to withstand static loads. This study shows that a welding current of 160 Ampere produces the highest tensile strength with an average value of 207.49 MPa, while a current of 100 Ampere has the lowest tensile strength with an average of 132.85 MPa. For a current of 130 Ampere, the average tensile strength was recorded at 154.128 MPa. The bending test results revealed that only welding with a current of 160 Ampere met the standard criteria, while currents of 100 Ampere and 130 Ampere experienced cracks and fractures that exceeded the standard limits. Microstructural analysis showed that in the heat affected zone (HAZ), the Mg2Si phase was most dominant at a current of 160 Ampere, which also applied to the weld metal. This Mg2Si phase contributed to the increase in the mechanical strength of the material. Based on these results, this study emphasizes the importance of choosing the right current in welding aluminum 6061, with a current of 160 Ampere as the best choice to produce strong weld joints.
Microstructural evolution and mechanical performance of Ni-modified sand-cast excavator bucket teeth Hidayat, Ery; Siswanto, Ari; Hermana, Gita Novian; Kusnowo, Roni; Ruskandi, Cecep; Gunara, Sophiadi; Komara, Asep Indra
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8744

Abstract

Excavator bucket teeth require high strength, hardness, and impact toughness to withstand severe service conditions involving abrasion and repeated impact. Achieving this combination of properties in sand-cast low-alloy steels remains challenging. This study investigates the microstructural evolution and mechanical properties of nickel-modified sand-cast bucket teeth subjected to a five-step heat treatment process. The material was produced by sand casting with the addition of 0.6 wt.% Ni, followed by sequential heat treatment consisting of normalizing, pre-tempering, quenching, and double tempering. Microstructural characterization and mechanical testing were conducted to evaluate the effects of the heat-treatment sequence on material performance. The applied heat treatment produced a lath martensite as the dominant microstructure with the presence of retained austenite. After the final tempering stage, the tensile strength reached 1206 MPa, with a hardness of 51 HRC, and an impact toughness of 26.1 J/mm2. The improved impact resistance is associated with retained austenite promoted by nickel addition. Fractographic analysis revealed predominantly ductile fracture characterized by dimple formation, followed by crack propagation involving intergranular and secondary cracking features. These results demonstrate that nickel modification combined with heat treatment effectively improves the mechanical performance of sand-cast bucket teeth.
Pendekatan Hukum Stokes Pada Proses Terjadinya Slag Untuk Meningkatkan Efektifitas Pembersihan Cairan Logam Pada Proses Peleburan Besi Cor Nadi, Muhammad Rizki Gorbyandi; Ruskandi, Cecep; Siswanto, Ari; Koswara, Eko
INDONESIAN JOURNAL OF APPLIED PHYSICS Vol 12, No 2 (2022): October
Publisher : Department of Physics, Sebelas Maret University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.13057/ijap.v12i2.57997

Abstract

Tujuan dari penelitian ini adalah untuk meningkatkan efektifitas pembersihan slag pada proses peleburan besi cor. Penelitian ini menghasilkan perhitungan kecepatan terminal slag muncul ke permukaan tanur induksi berdasarkan pendekatan Hukum Stokes pada masing-masing slag yang muncul saat proses peleburan besi cor. Setiap pengecoran besi cor diambil tiga buah sampel berdasarkan waktu tercepat pada slag yang sangat ringan, waktu terlambat yang dimiliki oleh slag terberat dan waktu ekstrem sebagai pembanding. Hasil dari setiap sampel dilakukan pengujian karakterisasi seperti bentuk, ukuran dan komposisi kimia pada setiap sampel yang kemudian disesuaikan dengan perhitungan yang telah dibuat. Karakterisasi dianalisa dengan menggunakan X-ray diffraction, Scanning micrsocope elektro dan energy dispersive spectroscopy micro analysis. Hasil menunjukkan bahwa pendekatan hukum stokes untuk memprediksi slag mencapai permukaan mendapatkan hasil yang sesuai bahwa seluruh slag mencapai permukaan pada waktu t = 230 s. Slag yang muncul pada waktu t = 300 s merupakan slag yang terbentuk akibat interaksi cairan dengan permukaan yang bukan merupakan slag yang terjadi dari raw material yang digunakan. Penelitian ini berhasil untuk meminimalisir terbentuknya slag pada setiap pengecoran besi cor menggunakan tanur induksi.
Co-Authors Achyarsyah, Mochamad Anwar, Widya Fransiska Febriati Ardiansyah Asep Indra Komara Edward Saleh Gita Novian Hermana Gunara, Sophiadi Hanaldi , Kus Hanaldi, Kus Hidayat, Ery Ika Juliantina Iwan Gunawan Khalilulah, Ilham Khalilullah, Ilham Koswara, Eko Kristantina Indriastuti, Kristantina Kusnowo, Roni Maulid M. Iqbal, Maulid M. Nadi, M. Rizki Gorbyandi Nadi, Muhammad Rizki Gorbyandi Novianti, Yuniar Purwadi , Wiwik Purwadi, W. Purwadi, Wiwik Putri, Amalia Dwi Ramadisu Mafra, Ramadisu Ruskandi, Cecep Susilo Kusdiwanggo, Susilo Wargadalem, Farida R. WICAKSONO, BAMBANG