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Priyagung Hartono
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Automotive Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Journal : RING Mechanical Engineering

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PEMANFAATAN LIMBAH TEMPURUNG KELAPA DAN GETAH NANGKA DALAM PEMBUATAN BIOBRIKET Rahman, Hairul; Priyagung Hartono; Mochammad Basjir
RING ME Vol 3 No 2 (2023): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v3i2.21439

Abstract

ABSTRACTBiomass is material obtained from plants, either directly or indirectly, and used as energy or materials in large quantities. Using plantation waste, namely coconut shells which will be processed into solid fuel, namely (briquettes). The coconut shell is carbonated into charcoal which will be mashed into a charcoal surge with mesh size 40, mesh 60 and mesh 80. Using charcoal powder as much as 28 grams, 26 grams, and 22 grams which will be mixed with nagka sap as much as 7 grams, 8 grams, and 12 grams. Briquettes are printed using hollow iron with a size of 3x3 cm and will be dried in the sun for 4 days of drying. Test parameters include moisture content test, combustion rate test, calorific value test. The results showed that the briquettes in mesh 80 with the addition of jackfruit sap adhesive of 28 grams of charcoal and 8 grams of jackfruit sap had the best calorific value of 6643.84 ccal/grammwith a burningg rate of 0.221 grams/minutee and a moisture content of 8.71%.Keywords : Biomass, Briquettes, Coconut Shell, Jackfruit Sap
PENGARUH LAPISAN SERAT dan RESIN EPOXY terhadap KEKUATAN UJI IMPACT KOMPOSIT SERAT ECENG GONDOK Zidan Septian Adisurya; Priyagung Hartono; Cepi Yazirin
RING ME Vol 3 No 2 (2023): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v3i2.21495

Abstract

A composite is a material structure formed from a combination of two or more materials, processed on a macroscopic scale and physically fused. To improve the characteristics of natural fibers in composites, a NaOH alkalization process is carried out which influences the fiber composites. Real experimental strength of the composite. The results showed that Alkalization of NaOH in water hyacinth fiber with variations in resin and fiber fractions (40%, 50%, 60%) and concentration (5% and 10%) affected the impact value. Specimens with a 60% resin and fiber fraction that experienced 5% alkalization showed the lowest impact, while a 40% resin and fiber fraction that experienced 10% alkalization had the highest impact. These findings indicate that NaOH alkalization significantly affects water hyacinth fibers, potentially increasing strength due to the removal of lignin, hemicellulose, and pectin. Loss of these components can make the fiber more brittle and susceptible to damage. In testing the resin and fiber fractions (40%, 50%, 60%) with varying concentrations (5% and 10%) when mixing fiber with matrix, it was found that the 60% resin and fiber fraction with a concentration of 5% had the lowest impact strength of 61 J/mm2, while the resin and fiber fraction of 40% with a concentration of 10% has the highest strength of 82 J/mm2. The results of this research highlight the importance of optimizing the volume fraction of fiber and epoxy matrix to improve the impact characteristics of water hyacinth fiber composites.Keywords: composite, alkalization, volume fraction, fiber, water hyacinth
ANALISIS PENGARUH PERLAKUAN PANAS HASIL PENGELASAN GMAW BAJA ST - 40 TERHADAP KEKERASAN DAN STRUKTUR MIKRO Muhammad Ikhwanul Munir; Priyagung Hartono; Artono Raharjo
RING ME Vol 3 No 2 (2023): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v3i2.21502

Abstract

ABSTRACT Currently, many welding elements are involved in construction, especially in the field of design, because welding is one way of making connections, and to obtain good quality connections requires the skills of technically advanced welders. One welding method that is often used in the manufacturing industry is Gas Metal Arc Welding (GMAW). This welding uses noble gases and carbon dioxide gas as a shield for the arc and molten metal from atmospheric influences. After testing the micro Rockwell hardness and micro structure, data was obtained that could be analyzed further. In this study, the material was ST 40 steel with a thickness of 10 mm, welding was carried out using GMAW welding with butt join welding and 1G position. Hardness testing uses the micro rockwell method at each time variation of 60 minutes, 90 minutes and 120 minutes at the Weld metal point and HAZ (Heat Affected Zone) with a maximum load of 650 g. Micro Rockwell hardness test results from the three time variations, the highest hardness value was found in welding with a time of 120 minutes with a value for weld metal of 71.3 HRN and a HAZ of 62.3 HRN. The lowest hardness value was found in welding using a time of 60 minutes with a value for weld metal of 68.6 HRN and HAZ of 59.1 HRN. Keywords: GMAW Welding, Rockwell Hardness, Microstructure
Analisis Pengaruh Variasi Heat Treatment Material Aluminium Alloy 6063 Terhadap Laju Korosi Asri Dilomo; Priyagung Hartono; Unung Lesmanah
RING ME Vol 4 No 1 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v4i1.21533

Abstract

Corrosion is material damage caused by comprehensive aspects, destruction or damage to the material due to reactions with its environment. Corrosion is a damage to materials (generally metals), the corrosion process occurs not only in the form of chemical reactions, but also electrochemical reactions. In the industrial world, the use of engineering materials is one of the most important for the application of various kinds of equipment, the use of alumininium alloy material which is very widely applied, especially in the development of the automotive sector that requires lightweight materials and is not susceptible to damage caused by corrosion, improving material properties by changing the atomic structure of the material by heat treatment of materials using the precipitation hardening method. Corrosion analysis on aluminum alloy 6063 material using weight loss method according to ASTM G31-72 standard, reweighing material after corrosion on pure seawater media to determine material weight loss caused by seawater
PENGARUH PELAPISAN SERAT KARBON PADA ALUMUNKUM 6061 TERHADAP SIFAT MEKANIK Muhammad Rafli; Priyagung Hartono; Mochammad Basjir
RING ME Vol 4 No 1 (2024): RING Mechanical Engineering
Publisher : Universitas Islam Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33474/rm.v4i1.21543

Abstract

ABSTRACT Knowledge about technology will continue to develop by itself through individual thoughts, the rapid progress of science and technology opens up thoughts and ideas in forming materials and even modifying them, which in general the frame or chassis of vehicles uses steel, steel is very heavy compared to aluminum. but changing a material will cause a lack of safety and comfort because aluminum is known to have a very low level of strength when compared to heavy metals. So carbon fiber was added to the surface of aluminum 6061 with carbon fiber thicknesses of 4 mm, 8 mm and 10 mm, in fiber directions of 45o and 90o by carrying out impact testing and bending testing to see the strength of the material when loaded. T The presence of 45o and 90o fiber directions slightly affects the maximum load on 6061 aluminum with a woven carbon fiber layer, where the average value in the 45o direction is 90.7 and 90o 80.8. However, by reducing the thickness of aluminum 6061, it reduces the bending strength value of the specimen due to the lack of moment of inertia, the coating specimen also appears to be coming off due to the lack of adhesion of the carbon fiber webbing to aluminum 6061. The attachment process is influenced by the hardness of the specimen so that the rougher the material structure, the higher the coefficient. high friction, Keywords: Aluminum 6061; Carbon Fiber; Impact Test; Bending Test.
Co-Authors Artono Raharjo Asri Dilomo Basjir, Mochammad Ghea Sandika Ismi Choirotin Muhammad Ikhwanul Munir Muhammad Rafli Rahman, Hairul Unung Lesmanah Yazirin, Cepi Zidan Septian Adisurya