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All Journal Jurnal Dedikasi Jurnal Gamma R.E.M (Rekyasa Energi Manufaktur) Jurnal Journal of Energy, Mechanical, Material and Manufacturing Engineering Society: Jurnal Pengabdian Masyarakat
Murjito Murjito
Mechanical Engineering Department Universitas Muhammadiyah Malang
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Mechanical Engineering Public Health Social Sciences

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REKAYASA PROSES IRON SOFT MAGNETIC MELALUI MECHANICAL ALLOYING POWDER METALURGY BERBASIS SERBUK BESI LOKAL Murjito .
Jurnal Gamma Vol. 8 No. 1 (2012): September
Publisher : Jurnal Gamma

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Abstract

REKAYASA PROSES IRON SOFT MAGNETIC MELALUI MECHANICAL ALLOYING POWDER METALURGY BERBASIS SERBUK BESI LOKALMurjitoStaf Pengajar Jurusan Teknik Mesin, Fakultas Teknik Universitas Muhammadiyah Malang Email: moerjit@gmail.com, murjito@umm.ac.idABSTRACTSoft magnetic materials is a phenomenon that is interesting and unique, this uniqueness needs to be studied more deeply. Soft magnetic material (magnetic ferro) has been known since hundreds of years ago, but until now this process is still the process of making traditional process that is commonly used casting process. Casting process is still much to experience weaknesses and limitations, namely, melting energy is so high that no efficient, long process, the results can not be maximal, low dimensional accuracy, there is still further processes, and limited to certain elements, so that when it wants to make magnetic alloy of various elements or particles are still difficulties.To seek alternative production process of soft magnetic materials it is necessary to a solution or process engineering, on this occasion the researchers manipulate the process of soft magnetic material is iron with powder metalurgy mechanical alloying, in order to obtain the good soft magnetic iron and has high accuracy.In this study, researchers make the engineering process of soft magnetic iron production by mechanical alloying process based yan powder metalurgy local iron sands. Basis that the use of local sand backdrop of the results of the data that we can from raw materials and foundry industries penunjangsebagian materials are still imported. The ingredients are 100% pengadaanya still relies imported iron ore and materials are alloys (Alloy).The purpose of the study is the reverse process of soft magnetic iron by mechanical alloying of powder metalurgy process so that we will know the characteristics thermadinamika properties and mechanical properties of materials at various particle sizes up to the size of the micro / nano powder.Key word : soft magnetic materials, process engineering, mechanical alloying powder metalurgy
Rancang Bangun Electrolyzer Sistem Dry Cell untuk Penghematan Bahan Bakar Kendaraan Bermotor Murjito .
Jurnal Gamma Vol. 9 No. 1 (2013): September
Publisher : Jurnal Gamma

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Rancang Bangun Electrolyzer Sistem Dry Cell untuk Penghematan Bahan Bakar Kendaraan BermotorElectrolyzer Dry System Design for Saving Fuel Cell VehicleMurjitoJurusan Teknik Mesin, Fakultas teknik, Universitas Muhammadiyah MalangEmail: murjito1967@gmail.comABSTRACTHHO gas is the result of the electrolysis of water which has been used as a fuel mixture in combustion engines. The application of HHO gas injection regardless of the uncontrolled burning can degrade the quality. In this research, design and manufacture of Dry Cell Elektrolyzer system and testing the characteristics of electrolysis HHO gas. This tool uses only pure distilled water medium is inserted into the tube available. In addition, NaOH or KOH is also used as an ingredient. The addition of HHO gas on combustion engines to improve the quality of combustion because gas has a calorific value and high octane. Current setting is done via Pulse Width Modulation (PWM) to vary the gas production. Gas production can be setup became active at rpm above idle and the gas flow rate can be varied based on the spin machine.Keywords: Elektrolyzer, Electrolysis, Dry Cell, HHO Gas ProductionABSTRAKGas HHO adalah hasil dari elektrolisis air yang telah digunakan sebagai campuran bahan bakar dalam mesin pembakaran. Penerapan injeksi gas HHO terlepas dari pembakaran yang tidak terkontrol dapat menurunkan kualitas. Dalam penelitian ini, desain dan pembuatan sistem Dry Cell Elektrolyzer dan menguji karakteristik gas HHO elektrolisis. Alat ini hanya menggunakan media air suling murni dimasukkan ke dalam tabung yang tersedia. Selain itu, NaOH atau KOH juga digunakan sebagai bahan. Penambahan gas HHO pada mesin pembakaran untuk meningkatkan kualitas pembakaran karena gas memiliki nilai kalori dan oktan tinggi. Pengaturan saat ini dilakukan melalui Pulse Width Modulation (PWM) untuk memvariasikan produksi gas. Produksi gas bisa diseting menjadi aktif pada rpm atas menganggur dan laju aliran gas dapat bervariasi berdasarkan putaran mesin.Kata kunci: Elektrolyzer, Elektrolisis, Dry Cell, Produksi Gas HHO
Pengaruh Variasi Holding Time Peleburan terhadap Karakteristik Logam Al-Si Menggunakan Cetakan Pasir Muhammad Taufiq; Murjito Murjito; Dini Kurniawati
R.E.M. (Rekayasa Energi Manufaktur) Jurnal Vol 3 No 1 (2018): June
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/r.e.m.v3i1.1590

Abstract

Molten metal is a method to form metal to be base material of making equipment and give great advantages to human life. Purpose of this research is to find out impact value, hardness, macro defect, and micro structure as the result of holding time in molten Al-Si. Impact value of Al-Si due to molten holding time by variation of 0, 10,20, and 30 minutes are respectively 0.37 joule/mm2, 0.29 joule/mm2, 0.30 joule/mm2, and 0.26 joule/mm2. Meanwhile, hardness value of 0, 10, 20, and 30 minutes holding time are respectively 65.886 kg/mm2, 81.681 kg/mm2, 88.86 kg/mm2 and 86.265 kg/mm2. Brittle fracture occurred in all specimens and granule size of micro structure is smaller with the holding time. This research confirms that impact value has inverted correlation to hardness value. The lower of impact value, the higher hardness value. Based on micro structure observation on Al-Si casting due to molten holding time in 0, 10, 20, and 30 minutes variation, it is obtained smaller granule size.
Effect of magnesium addition in aluminum A1100 casting process on its hardness Rigel, Muhammad; Murjito, Murjito; Mamungkas, Mohamad Irkham
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol. 9 No. 1 (2024)
Publisher : University of Muhammadiyah Malang

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This study investigated the effect of adding magnesium to the hardness of aluminum A 1100 in the casting process using Rockwell testing. Aluminum A 1100 is known to have relatively low mechanical strength but has good corrosion properties. The addition of magnesium is done to increase the hardness of aluminum A 1100. Aluminum A 1100 samples are made with variations of adding 0%, 2%, 4%, and 6% by weight. Casting is carried out using prepared sand molds, and the resulting A 1100 aluminum specimens are tested by Rockwell testing. The findings could guide industries that use aluminum A 1100 in applications requiring higher hardness, such as automotive or manufacturing. In addition, this research may serve as a foundation for further studies on the effect of magnesium addition on the mechanical properties of aluminum A 1100 using different test methods.
Introduction to Energy and Energy Saving Culture for ABA 25 Malang Kindergarten Students Mamungkas, Mohamad Irkham; Subekti, Nur; Murjito, Murjito
Society : Jurnal Pengabdian Masyarakat Vol 4, No 4 (2025): Juli
Publisher : Edumedia Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55824/jpm.v4i4.590

Abstract

This community service departs from the lack of basic understanding of ABA 25 Malang kindergarten students about the concept of energy and the importance of an energy-saving culture, a crucial issue given the challenges of the energy crisis and global climate change. To overcome this problem, we implemented a solution in the form of an interactive educational program designed specifically for early childhood. The methods used include storytelling, simulation games, educational songs, and hands-on practices (e.g. turning off lights when leaving the room or closing the water tap after use) that are presented in an interesting and digestible manner. The results of this community engagement activity showed a significant increase in students' awareness and understanding of various energy sources as well as the benefits of energy saving, as evidenced by the positive responses and simple behavioral changes that began to be demonstrated in daily activities at school. The conclusion of this service confirms that a fun and practical educational approach at an early age is very effective in instilling energy conservation values and building the foundation of environmental awareness for future generations.
Introduction to Energy and Energy Saving Culture for ABA 25 Malang Kindergarten Students Mamungkas, Mohamad Irkham; Subekti, Nur; Murjito, Murjito
Society : Jurnal Pengabdian Masyarakat Vol. 4 No. 4 (2025): Juli
Publisher : Edumedia Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55824/jpm.v4i4.590

Abstract

This community service departs from the lack of basic understanding of ABA 25 Malang kindergarten students about the concept of energy and the importance of an energy-saving culture, a crucial issue given the challenges of the energy crisis and global climate change. To overcome this problem, we implemented a solution in the form of an interactive educational program designed specifically for early childhood. The methods used include storytelling, simulation games, educational songs, and hands-on practices (e.g. turning off lights when leaving the room or closing the water tap after use) that are presented in an interesting and digestible manner. The results of this community engagement activity showed a significant increase in students' awareness and understanding of various energy sources as well as the benefits of energy saving, as evidenced by the positive responses and simple behavioral changes that began to be demonstrated in daily activities at school. The conclusion of this service confirms that a fun and practical educational approach at an early age is very effective in instilling energy conservation values and building the foundation of environmental awareness for future generations.
Co-Authors Ali Mokhtar Dini Kurniawati Mohamad Irkham Mamungkas Muhammad Taufiq Nur Subekti Rigel, Muhammad