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Mirza Yusuf
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Redaksi Quantum Teknika, Gedung D Lantai Dasar Kampus Terpadu Universitas Muhammadiyah Yogyakarta, Jl. Brawijaya, Tamantirto, Kasihan, Bantul, DI Yogyakarta, 55183
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Quantum Teknika
Published by Universitas Muhammadiyah Yogyakarta
ISSN : -     EISSN : 27211932     DOI : 10.18196
Core Subject : Engineering,
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering
Quantum Teknika : Jurnal Teknik Mesin Terapan or Quantum Teknika is a peer-reviewed journal published by Universitas Muhammadiyah Yogyakarta. Quantum Teknika journal publishes twice a year in April and October. Mechanical engineering is a branch of engineering focusing on mechanical engineering research. Despite of that, the development of the mechanical engineering does not solely encompass machinery science but also other machine-related field such as the automotive science which is composed of energy conversion, design and the forming materials. Quantum Teknika journal accommodates these fields in order to spark various innovations in Indonesia. In the journal Quantum Teknika, accommodate these fields in this period, the year of innovation began in Indonesia. - Automotive Research - Research in The Field of Energy Conversion - Materials Engineering - Design and Manufacture
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 122 Documents
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Analisis SFC Campuran Biodiesel B35 Beraditif Imagina pada Mesin PLTD Luwuk Eksperimental Kinerja Energi Anwar, Mohammad Syaiful; Ahmadi, Nur; Yusuf, Mirza
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 7 No. 2 (2026): April
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v7i2.31550

Abstract

The use of B35 biodiesel in diesel engines often faces constraints related to performance and component durability, necessitating additives to improve fuel performance. Imagina® Dex Ultimate is an essential oil-based additive claimed to improve stability, cetane number, and lubrication properties, and to reduce deposits and corrosion. This study aims to analyze the characteristics of specific fuel consumption (SFC) in the use of B35 with the addition of Imagina additives in the Luwuk Diesel Power Plant (PLTD). The research method involved field testing on a diesel engine with a 1:1000 liters mixture ratio, mixing ±2 hours before testing, and operating the engine at three load levels (900, 700, and 500 kW). The test was carried out by comparing fuel without and with additives. The results showed that the addition of additives did not significantly reduce SFC across all load variations. At a load of 900 kW, energy production was relatively stable, with an increase of 0.07 kWh, while SFC increased by 0.0013 liters/kWh compared to the case without additives. Analysis of the fuel's physical properties shows that the density and flash point still meet B35 standards, while the FAME content is slightly above 35%. The calorific value did not increase significantly, and it even decreased by 0.18 MJ/kg in the Mitsubishi engine and by 0.06 MJ/kg in the Deutz engine. Based on these results, the use of the Imagina additive in B35 at the Luwuk Diesel Power Plant has not demonstrated technical feasibility in improving fuel consumption efficiency.
Evaluasi Pengaruh Temperature Solution Treatment terhadap Ketahanan Aus dan Kekerasan Baja Hadfield Faizal, Imam; Pratiwi, Swandya Eka; Yudhistira, Gilang Awan; Burhanuddin, Yanuar; Heltha, Fahri; Wahyudi, Haris
Quantum Teknika : Jurnal Teknik Mesin Terapan Vol. 7 No. 1 (2025): October
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jqt.v7i1.27082

Abstract

Hadfield steel is a high-manganese steel characterized by a high manganese content and is often referred to as high-manganese steel. Its alloy composition is generally maintained at a carbon-to-manganese ratio of approximately 1:10. This steel is known for its superior mechanical characteristics, including toughness, hardness, and wear resistance. In the as-cast condition, however, Hadfield steel initially exhibits inferior mechanical properties owing to the formation of carbide precipitates along grain boundaries caused by slow cooling during solidification. These grain-boundary carbides generate localized stresses and act as potential crack-initiation sites, thereby reducing toughness and ductility. Consequently, subsequent heat treatment, particularly solution treatment, is required to dissolve the carbides back into the austenitic matrix. The present results show that solution treatment significantly affects the mechanical properties and wear resistance of Hadfield steel. Hardness decreased after solution treatment (224.6 → 206.1 → 196.2 HV) because of the reduction of grain-boundary carbides. Nevertheless, the wear rate decreased, indicating improved wear resistance, after solution treatment: 0.299 → 0.179 → 0.119 ×10⁻³ mm³/N·m. After wear testing, the surface hardness increased owing to strain hardening, particularly in the heat-treated (HT) specimens: 230.2 → 262.8 → 272.2 HV. These findings indicate that solution treatment improves wear resistance through microstructural homogenization and enhanced strain-hardening response during wear loading.

Page 13 of 13 | Total Record : 122

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