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All Journal Science and Technology Indonesia Jurnal Konversi Energi dan Manufaktur JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI Nusantara Journal of Multidisciplinary Science Fortunate Business Review
Sopiyan
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Religion Aerospace Engineering Humanities Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Economics, Econometrics & Finance Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Physics

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Nichrome Dependency in Welding Layer Using In situ Fabrication on Hardness and Corrosion Properties Syaripuddin; Sopiyan; Muhammad Fauzan Perdana Putra; Maman Kartaman Ajiriyanto; Sigit Dwi Yudanto; Muhammad Yunan Hasbi; Susetyo, Ferry Budhi
Science and Technology Indonesia Vol. 9 No. 3 (2024): July
Publisher : Research Center of Inorganic Materials and Coordination Complexes, FMIPA Universitas Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26554/sti.2024.9.3.651-659

Abstract

The use of shielded metal arc welding (SMAW) equipment to synthesize alloys is one of the most promising methods as it can be used for in-situ fabrication. The hardness and corrosion properties of the deposited layer during the welding process can be enhanced by dilution of nichrome (NiCr) during the process. Therefore, the alloy was synthesized on the surface of the mild steel using SMAW equipment with various NiCr additions. The properties of the alloy were investigated using an X-ray diffraction (XRD), an Optical microscope, a Potentiostat, and a Vickers hardness apparatus. The appearance of martensite overlaps with the ferrite phase could be affected by the addition of NiCr to the alloy. An increase in NiCr content is followed by an increase in the lattice parameter value of the ferrite phase. The presence of a certain amount of nickel (Ni) contributes to the formation of lower transformation phases, including martensite. At the same time, the incorporation of chromium (Cr) also plays a significant role in promoting the formation of acicular ferrite. An increase in NiCr content in NiCr2 and NiCr3 samples results in a quantitative increase in martensite formation. Adding 0.434 g of NiCr to the weld deposited layer could result in the corrosion rate of the alloy being 0.1118 mm/y. Higher hardness is found in the NiCr3 sample, around 742.06 HV.
PERBANDINGAN PENGGUNAAN SINGLE INJECTOR DAN DOUBLE INJECTOR TERHADAP TORSI DAN DAYA PADA SEPEDA MOTOR EFI DENGAN KAPASITAS MESIN 110 CC MENGGUNAKAN BAHAN BAKAR PERTAMAX : Comparison of Using Single and Double Injector to Torque and Power on EFI Motorcycle with 110 cc Engine Capacity using Pertamax Fuel Darwin Rio Budi Syaka; Sopiyan; Alfian Dwi Prayogo
Jurnal Konversi Energi dan Manufaktur Vol. 8 No. 2 (2023)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.8.2.6

Abstract

Pertamax has the advantage of the pertatec compound protecting the engine from rust. In Pertamax fuel with an octane rating of 92 it works optimally and the rest of the combustion results. Meanwhile, an engine with a lower octane rating has the impact of burning fuel that explodes and has a risk of misalignment causing knocking symptoms. This research includes comparative research with experimental methods. The test results for a single injector (12 holes) have increased compared to a double injector (12 holes). 10.86 and on the double injector (12 holes) which is 12.25 so that the acceleration on the single injector is better than the double injector, the single injector (12 holes) which is 30.15 Kph/s and the double injector (12 holes) which is 29.37 Kph/s, resulting in greater torque and power values, namely single injector (12 holes) of 9.71 Nm and power of 10.19 HP and double injectors (12 holes) of 9.7 Nm and power of 8. 97 HP with the greatest speed obtained single injector (12 holes) 103.91 Km/h and Double injectors (12 holes) 103.68 Km/h. So that a single injector with 12 holes is better used on 110 cc vehicles seen from the aspect of the Dynotest.
Implementasi Pembuatan Website Company Profile Dan Menu Digital Pada Umkm Simalis Cafe Stefanus Eko Prasetyoi; Gautama Wijaya; Haeruddin; Sopiyan
Nusantara Journal of Multidisciplinary Science Vol. 2 No. 6 (2025): NJMS - Januari 2025
Publisher : PT. Inovasi Teknologi Komputer

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Abstract

SIMALIS Cafe merupakan sebuah usaha mikro kecil menengah (UMKM) di bidang kuliner yang berlokasi di Batam, Kepulauan Riau, menghadapi tantangan dalam meningkatkan efisiensi operasional dan daya saing di era digital. Sebagai solusi, proyek ini mengusulkan pembuatan website company profile dan menu digital untuk memudahkan akses informasi, meningkatkan visibilitas, dan mengoptimalkan pengalaman pelanggan. Metode penelitian yang digunakan adalah kualitatif, dengan tahapan identifikasi masalah, perancangan, implementasi, pengujian, dan analisis data. Website dikembangkan menggunakan WordPress dengan fitur-fitur seperti menu digital berbasis QR code, pemesanan online, dan informasi lengkap tentang cafe. Hasil implementasi menunjukkan peningkatan signifikan dalam visibilitas, efisiensi operasional, dan kepuasan pelanggan. Kesimpulannya, digitalisasi melalui website company profile dan menu digital terbukti efektif dalam mendukung pertumbuhan dan daya saing SIMALIS Cafe. Saran untuk pengembangan selanjutnya mencakup pemeliharaan rutin, pembaruan konten, dan pengumpulan umpan balik pelanggan untuk perbaikan berkelanjutan
Efek waktu tahan baja AISI 4140 terhadap struktur mikro, kekerasan, dan korosi Syamsuir; Syaripuddin; Sopiyan; Indriasti, Zulfah; Anggrainy, Rani; Lubi, Ahmad; Susetyo, Ferry Budhi
Jurnal Permadi : Perancangan, Manufaktur, Material dan Energi Vol 7 No 02 (2025): JURNAL PERMADI: PERANCANGAN, MANUFAKTUR, MATERIAL DAN ENERGI
Publisher : Universitas Nusa Putra

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52005/permadi.v7i02.197

Abstract

Baja AISI 4140 merupakan baja paduan menengah yang sering digunakan dalam aplikasi teknik, termasuk pada komponen kapal, karena memiliki kekuatan tinggi dan potensi untuk ditingkatkan sifat mekaniknya melalui perlakuan panas. Penelitian ini bertujuan untuk mengkaji pengaruh variasi waktu tahan pada proses perlakuan panas terhadap perubahan struktur mikro, kekerasan, dan laju korosi baja AISI 4140. Perlakuan panas dilakukan dengan memanaskan spesimen pada suhu 800°C selama 30 menit dan 45 menit, kemudian diikuti proses quenching menggunakan oli SAE 10W-40. Spesimen tanpa perlakuan panas digunakan sebagai pembanding. Struktur mikro diamati menggunakan mikroskop optik Olympus BX51M, kekerasan diuji dengan metode Vickers menggunakan beban 5 kg, dan korosi diuji dengan metode kehilangan berat dalam larutan NaCl 3,5%. Hasil pengamatan menunjukkan bahwa semakin lama waktu penahanan, struktur mikro didominasi oleh fasa martensit yang lebih halus dan homogen. Hal ini berdampak langsung pada peningkatan kekerasan material, di mana spesimen dengan waktu tahan 45 menit menunjukkan nilai kekerasan tertinggi 658,14 HV dibandingkan spesimen lainnya. Nilai laju korosi tertinggi diperoleh Q-30 melalui pengujian selama 96 jam sebesar 38,02 mpy
PENGARUH TITANIUM DALAM LAPISAN LAS TERHADAP STRUKTUR MAKRO-MIKRO, KEKERASAN, DAN LAJU KOROSI: Titanium Effect in Weld Layer on The Macro-microstructure, Hardness, and Corrosion Rate Sopiyan; Syaripuddin; Muhammad Hafidz Fatahillah; Muhammad Fauzan Perdana Putra; Muhammad Yunan Hasbi
Jurnal Konversi Energi dan Manufaktur Vol. 9 No. 2 (2024)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.9.2.2

Abstract

Low carbon steel cannot be hardened because of its low carbon content. Therefore, a hardfacing process is carried out to increase hardness. Apart from increasing hardness, the benefits of hardfacing can increase wear and corrosion resistance. The hardfacing process using the shielded metal arc welding (SMAW) process generally uses commercial electrodes. Therefore, it is necessary to add other elements such as titanium (Ti) to the weld layer to further increase its hardness. This research aims to study the influences of Titanium (Ti) addition in welding layers that were welded using HV 600 to micro and macrostructure, hardness, and corrosion rate. The hardfacing was conducted using the SMAW process with the various addition of Ti (0.115, 0.223, and 0.334 g) and cooled at room temperature. Macrostructure and microstructure were investigated using digital cameras and an optical microscope. Hardness and corrosion rate were investigated using the Vickers hardness test and weigh loss method. Based on macrostructure investigation, there is a perfect fusion between base metal and weld metal. The microstructure formed is a austenite, martensite and carbide phase. The lowest corrosion rate of 17.54 mpy was seen in the Ti1 sample. The lowest Ti addition would resulting higher hardness at 761.06 VHN.
PERILAKU DISTORSI, KEKERASAN DAN KOROSI HASIL HARDFACING PADA PERMUKAAN BAJA KARBON MENGGUNAKAN ELEKTRODA HV-800 DENGAN BERBAGAI KETEBALAN: Distortion, Hardness and Corrosion Behavior of Carbon Steel Hardfacing using HV-800 Electrodes with Various Thicknesses Syaripuddin; Sopiyan; Ahmad Nur Hisyam; Rani Anggrainy
Jurnal Konversi Energi dan Manufaktur Vol. 9 No. 2 (2024)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.9.2.7

Abstract

This research aims to look at the hardness and corrosion of the weld layer. In addition, distortions were also observed in the post-welding specimens. Weld layers were made with variations of one, two and three layers of welding using HV-800 electrodes. The first step in this research is a literature study, followed by preparing tools and materials, heating electrodes, welding process, observing distortion, cutting specimens for testing followed by hardness and corrosion testing, and data analysis and conclusions. From the results of observing the distortion, it can be seen that the thicker the weld layer, the greater the distortion that will occur. Distortions in specimens welded with one, two and three layers are 1.5, 4 and 6° respectively. Furthermore, based on the results of the hardness test, it can be seen that the thicker the weld layer, the greater the hardness. The hardness of the one, two and three layer welded specimens was 550.2, 632.82 and 650.68 HV respectively. Then, based on the weighing results, it can be seen that the longer the immersion time, the greater the reduction in mass during 120 hours of immersing. Finally, from the results of the corrosion rate calculation it can be seen that the thicker the weld layer, the lower the corrosion rate that will occur. The corrosion rates for specimens welded with one, two and three layers were 13.23, 11.02 and 10.29 mpy, respectively. All three specimens have good corrosion resistance because they fall into the "good" criteria.
Analisis Faktor yang Mempengaruhi Prestasi Akademik Mahasiswa yang Kuliah sambil Bekerja di Universitas Universal marliana; Gracea, Alvy; Anatasia, Christine; Khoesasi, Winchy; Ramli; Sopiyan
Fortunate Business Review Vol. 5 No. 2 (2025): Fortunate Business Review
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat - Universitas Universal.

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Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh manajemen waktu (X1) dan motivasi (X2) terhadap prestasi akademik (Y) mahasiswa yang berkuliah sambil bekerja penuh waktu di Universitas Universal. Penelitian ini menggunakan metode penelitian kuantitatif, di mana data dikumpulkan menggunakan kuesioner melalui Google Form. Sampel penelitian dipilih menggunakan metode purposive sampling, sehingga diperoleh sebanyak 189 mahasiswa aktif yang belajar sambil bekerja. Melalui analisis regresi linier berganda, hasil penelitian menunjukkan bahwa kedua variabel menunjukkan arah hubungan yang positif, tetapi keduanya tidak memberikan pengaruh signifikan secara statistik. Temuan ini menegaskan bahwa pencapaian akademik mahasiswa pekerja seringkali lebih bergantung pada tingkat usaha, dedikasi, dan faktor kontekstual terkait peran ganda, di mana fokus mahasiswa cenderung pada pemenuhan kebutuhan finansial atau mendapatkan gelar untuk kenaikan jabatan. Tantangan utama yang menghambat adalah ketegangan peran (role strain) akibat konflik antara tuntutan kerja dan kuliah yang intens yang memicu kelelahan fisik dan mental. Selain itu, kurangnya keterampilan self-management dan perilaku prokrastinasi juga menjadi faktor penghambat. Studi ini memberikan wawasan bahwa bagi mahasiswa zaman sekarang yang pragmatis, pencapaian prestasi akademik mungkin lebih ditentukan oleh efisiensi pemanfaatan teknologi digital dan Kecerdasan Buatan (AI) daripada dorongan motivasi intrinsik. Untuk memperdalam pemahaman, penelitian selanjutnya disarankan untuk menggunakan pendekatan campuran (mixed methods) guna mengeksplorasi persepsi subjektif dan meneliti peran variabel lain seperti self-management, prokrastinasi, dan dampak AI.
Co-Authors Ahmad Nur Hisyam Alfian Dwi Prayogo Anatasia, Christine Anggrainy, Rani Darwin Rio Budi Syaka Ferry Budhi Susetyo Gautama Wijaya Gracea, Alvy Haeruddin Indriasti, Zulfah Khoesasi, Winchy Lubi, Ahmad Maman Kartaman Ajiriyanto Marliana Muhammad Fauzan Perdana Putra Muhammad Hafidz Fatahillah Muhammad Yunan Hasbi Ramli Rani Anggrainy Sigit Dwi Yudanto Stefanus Eko Prasetyoi Syamsuir Syaripuddin