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All Journal Rotasi Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Jurnal Ilmu-Ilmu Peternakan (Indonesian Journal of Animal Science) Journal of Environmental Engineering and Sustainable Technology Jurnal Ternak Tropika International Journal of Mechanical Engineering Technologies and Applications (MECHTA) Proceeding ISETH (International Summit on Science, Technology, and Humanity)
Wahyono Suprapto
Universitas Brawijaya
Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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Pengaruh Tekanan Vacuum terhadap Kekuatan Tarik dan Kekuatan Lentur pada Biokomposit Serat Purun Tikus (Eleocharis Dulcis) Fauzi, Yusuf Rizal; Sonief, Achmad As’ad; Suprapto, Wahyono
Jurnal Rekayasa Mesin Vol 7, No 3 (2016)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (471.806 KB) | DOI: 10.21776/ub.jrm.2016.007.03.4

Abstract

In particular composite materials made from polymer biocomposite material which is now becoming an alternative to the metal and is very widely applied in the manufacturing industry because of its corrosion resistance and high strength ratio of specific gravity. Natural fiber began to be used for reinforcement in composites instead of synthetic fiber such as glass fiber because of its environmental friendly and widely available in nature. Meanwhile, the application of the natural fiber is still not optimized. The method to produced the composite is by isolate and vacuuming mold composite specimens (biocomposites) in a container (the media) to reduce the pressure around, so that the composite (biocomposite) is not in direct contact with the air, void in composite can decrease the strength of the composite. The matrix is 157 BTQN Polyester and the catalis is MEKPO with concentration of 1%. Specimens have been tested mechanically those are tensile testing and flexure testing and the specimen was evaluated using SEM and fracture was observe using macro photos. The results showed that there are significant effect of vacuum pressure level to the biocomposite tensile strength and flexural strength. Specimens with angular orientation 0/90/0/90 shows the tensile strength of 54.7 MPa and bending strength of 243 MPa.
Modus Pelunakan dan Pengerasan HAZ pada Manual GMAW Welded Joint Yurianto, Yurianto; Pratikto, Pratikto; Soenoko, Rudy; Suprapto, Wahyono
ROTASI Vol 21, No 2 (2019): VOLUME 21, NOMOR 2, APRIL 2019
Publisher : Departemen Teknik Mesin, Fakultas Teknik, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1261.768 KB) | DOI: 10.14710/rotasi.21.2.127-133

Abstract

Las manual gas metal arc welding banyak digunakan dalam industri manufaktur konvensional. Akhir proses pengelasan menghasilkan produk las yang diinginkan. Pada baja dengan tebal dan jenis yang sama, dan metode pengelasan yang sama tetapi operator berbeda menghasilkan kekuatan las yang berbeda. Keseragaman produk las antara satu dan operator lain dapat diperoleh dengan welding procedure specification. Namun prosedur ini tidak menjamin kekuatan sambungan sama meskipun operator berbeda. Kekuatan daerah terpengaruh panas tergantung pada parameter las yang digunakan seperti diameter elektroda; arus listrik; tegangan listrik, kecepatan pengelasan; logam tebal dan panas masuk. Selain itu, perlu dipertimbangkan unsur kimia baja yang dilas. Parameter pengelasan akan mempengaruhi dimensi daerah terpengaruh panas. Semakin lebar daerah terpengaruh panas akan menurunkan kekuatan sambungan las. Pernyataan masalah dalam penelitian ini adalah "bagaimana menurunkan dimensi daerah terpengaruh panas yang dipengaruhi oleh proses pembekuan logam las." State of the art dari penelitian ini adalah analisis pelunakan daerah terpengaruh panas dengan melibatkan pembekuan logam las. Tujuan dari penelitian ini adalah untuk mencari penyebab terjadinya pelunakan dalam daerah terpengaruh panas sambungan las gas metal arc welding manual. Hasil penelitian adalah kekerasan standard dan heat treated welded joint. Parameter perlakuan panas untuk mendapatkan kekerasan HAZ tertinggi.
Kekuatan Tarik dan Porositas Hasil Sambungan Las Gesek Aluminium 6061 dengan Berbagai Suhu Aging Setyawan, Pungky Eka; Irawan, Yudy Surya; Suprapto, Wahyono
Jurnal Rekayasa Mesin Vol 5, No 2 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (438.104 KB)

Abstract

Aluminum alloy is one of materials that is difficult joining with fusion welding. Friction welding is solution to solve engineering problems in joinning with fusion welding. The parametersthat influence onfriction weldingare frictiontime, rotational speed, compressive force, and upset force. In this study, specimens were friction welded with rotation speed of 1600 rpm, compressive force during friction welding 123 kgf for 120 seconds, and upset force 202 kgf for 120 seconds.The weakness of the friction welding process is a decline in strength, it is due to friction welding is done in solid condition. In order to increase tensile strength of friction welding joint, precipitation hardening methods can be used.Precipitation hardening methods carried out in three stages, solution heat treatment, quenching and agingwith artificial aging process. The artificial aging temperature variated by 150 C, 185 0 C 200 0 C, and 225 0 C with a holding time in 7 hours. The results showed that precipitation hardening cause porosity decreasedin the weld joint. Specimens with a aging temperature 150 0 C and holding time for 7 hours has the smallest porosity of 0,11 % and it has maximum tensile strength of 186,65 MPa.Keywords: Tensile Strength, Pososity, Friction Welding, Aging Treatment.
TORSION STRENGTH OF ROUND BAR A6061 FRICTION WELD JOINT INFLUENCED BY FRICTION TIME, UPSET FORCE AND ONE-SIDE CONE GEOMETRY Yudy Surya Irawan; Wahyono Suprapto; Tjuk Oerbandono
Journal of Environmental Engineering and Sustainable Technology Vol 4, No 2 (2017)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2017.004.02.3

Abstract

ABSTRACTEffect of friction time, upset force and one-side cone geometry on torsion strength of A6061 round bar friction weld joint was studied. Round bar commercial A6061 was friction welded with initial compression force of 2.5 kN on stationary part and the rotated part had revolution speed of 1600 rpm with variation of friction time of 45, 50 and 55 minutes. In the upset stage, the variation of upset force of 5 kN, 7.5 kN and 10 kN with the same upset holding time of 110 seconds. The stationary part of the specimen had friction area with variation of cone geometry that represented with ratio of upper diameter, D1 and lower diameter, D2, D1/D2. It was found friction time and the ratio of D1/D2 affected torsion strength in the upset force below 10 kN. In case of the higher upset force of 10 kN, the upset force more dominant to affect torsion strength of the continuous drive friction weld (CDFW) joint. The specimen with maximum torsion strength has more precipitates in grains of microstructures compared to that of specimen with lower torsion strength. Keywords: Continuous drive friction welding, aluminum, friction time, upset force, one-sdie cone geometry, torsion strength.
PENGARUH PERSENTASE ZEOLIT ALAM TERHADAP SHRINKAGE MATRIK ALUMINA ZEOLIT ALAM KERAMIK KOMPOSIT Sri Mulyo Bondan Respati; Rudy Soenoko; Yudy Surya Irawan; Wahyono Suprapto
Prosiding SNST Fakultas Teknik Vol 1, No 1 (2014): PROSIDING SEMINAR NASIONAL SAINS DAN TEKNOLOGI 5 2014
Publisher : Prosiding SNST Fakultas Teknik

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Abstract

Kajian tentang shrinkage pada alumin zeolit alam komposit telah dilakukan. Pengukuran volume green part dan volume keramik serta berat spesimen berbentuk tangkai spesimen pullout dilakukan berdasarkan hasil dari sintering menggunakan burner furnace. Penelitian ini bertujuan untuk mencari berat jenis dari spesimen green part dan spesimen keramik serta menghitung shrinkage yang terjadi akibat sintering pada suhu 1250OC. Penelitian ini menggunakan bahan alumina A12 dan zeolit alam produksi Batu Malang dengan campuran 10, 20, 30, dan 40 % berat zeolit yang dikompaksi pada 90 Mpa untuk menghasilkan green part. Penelitian ini menghasilkan berat jenis green part 1,21-1,36 gr/cm3, berat jenis keramik 1,20-1,33 gr/cm3 dan shrinkage 2,31-6,55 %. Hasil penelitian diharapkan dapat untuk menghitung dalam perencanaan pembuatan spesimen uji pullout dengan penambahan serat kontinyu stainless steel. Kata Kunci: alumina, natural zeolite, ceramic, matrix composite, sintering, burner furnace
Peranan aerasi dan silika serta lama pemeraman terhadap kandungan pupuk cair lumpur organik unit gas bio Mochammad Junus; Agung Sugeng Widodo; Wahyono Suprapto; Windi Zamrudy
Jurnal Ilmu-Ilmu Peternakan (Indonesian Journal of Animal Science) Vol 24, No 1 (2014)
Publisher : Faculty of Animal Science, Universitas Brawijaya

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Abstract

Organic Sludge Biogas Unit (OSBGU) is a product that was generally less noticed by the owner. Filtering solids and liquids of OSBGU would be very helpful for feedstuffs and fertilizer plants. Giving aeration and silica in the fluid of OSBGU as long ripening treatment with 1, 2, 3, 4 and 7 days was expected to transform the liquid into a better liquid fertilizer of OSBGU. The results showed that the effect of treatment, fermentation time and the interaction among them on the content of liquid OSBGU manure on pH, organic C, N total, C/N ratio, and organic matter was highly significant (P<0.01), except for total N did not have differences (P>0.05). The study concluded that the role of aeration and the addition of silica and long ripening and their interaction was very influential on the content of liquid OSBGU manure on pH, organic C, C/N ratio and organic ingredients, except the N total. The study suggested to use aeration and if necessary by adding silica and fermentation time until on day 7 to improve the content of liquid OSBGU manure.   Keywords: organic sludge biogas unit, pH, organic C, total N, C/N ratio, material organic, fermentation time
INCREASED TENSILE STRENGTH OF DISSIMILAR FRICTION WELD JOINT OF ROUND BAR A6061/S15C USING UPSET FORCE AND ONE-SIDE CHAMFER ANGLE Yudy Surya Irawan; Dwi Prasetyo; Teguh Dwi Widodo; Wahyono Suprapto; Tjuk Oerbandono
Journal of Environmental Engineering and Sustainable Technology Vol 6, No 1 (2019)
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jeest.2019.006.01.2

Abstract

An effort to increase the tensile strength of dissimilar friction weld joint of round bar A6061/S15C was done in this study using upset force and one-side chamfer angle. Commercial round bar aluminum alloy A6061 and carbon steel S15C were used as rotated and a stationary part, respectively in continuous drive friction welding (CDFW) process. Upset force variations of 10.5, 14, and 17.5 kN were used. CDFW process used burn of length of 15 mm for all CDFW specimens. Chamfer angle was machined on friction area of the S15C stationary part with the variation of 0 (without chamfer angle), 30 and 45 degrees. Tensile strength test, macrostructure observation and micro Vickers hardness testing, SEM-EDX analysis were performed. It was found that the smaller chamfer angle (30 degrees) produced maximum tensile strength of A6061/S15C CDFW joint. It occurred due to smaller formed flash, the lower temperature of the flash that indicate lower heat input and caused smaller heat affected zone and higher hardness in the CDFW joint. The higher upset force also yields higher tensile strength of CDFW joint due to the higher degree of plastic deformation during the upset stage of CDFW joint and this state contributes to higher hardness and tensile strength of A6061/S15C CDFW joint. SEM-EDX analysis result also confirmed that more aluminum existed on the fracture surface of the A6061/S15C CDFW specimen with maximum tensile strength.
PERANAN AERASI DAN SILIKA SERTA LAMA PEMERAMAN TERHADAP KANDUNGAN UNSUR HARA PUPUK CAIR LUMPUR ORGANIK UNIT GAS BIO Mochammad Junus; Agung Sugeng Widodo; Wahyono suprapto; Windi Zamrudy
TERNAK TROPIKA Journal of Tropical Animal Production Vol 15, No 1 (2014): TERNAK TROPIKA
Publisher : Jurusan Produksi Ternak, Fakultas Peternakan, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (824.449 KB) | DOI: 10.21776/ub.ternaktropika.2014.01.1

Abstract

Organic sludge biogas unit (OSBGU) is an organic product that is generally overlooked by the owner. Giving aeration and silica as treatment with longer curing 1, 2, 3, 4 and 7 days for prospective OSBGU liquid fertilizer is expected to change the percentage of the nutrient content of liquid manure OSBGU candidates become better liquid fertilizer. The results showed that the effect of treatment, curing time and the interaction between the percentage of liquid manure nutrient content OSBGU on posphor (P), potassium (K), sodium (Na) and calcium (Ca) was significantly different. Conclusion: The role of aeration and the addition of silica as well as their interactions and their long ripening turns very significant effect on the percentage of the nutrient content of liquid fertilizer OSBGU. Suggestion: to make the aeration and the addition of silica to the fermentation time to increase the percentage of liquid manure nutrient content OSBGU should use aeration and if necessary by adding silica and brooded until on day 7
Lap Joint Carbon Steel ST 37 and Aluminum 6061 with Friction Stir Welding (FSW) Widia Setiawan; Djarot B. Darmadi; Wahyono Suprapto; Rudy Soenoko
Proceeding ISETH (International Summit on Science, Technology, and Humanity) 2016: Proceeding ISETH (International Conference on Science, Technology, and Humanity)
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

In this research, Aluminum 6061 and Carbon steel ST 37 sheet were lap joined by friction stir welding. A hardened medium carbonese steel (EMS 45) was used as rotary Probe. The microstructures of the joining inter-metallic compounds were observed by scanning electron microscopy, microstructure photograph, and micro-hardness tests. The joint strength was evaluated by shear stress tests. The experiment was performed with varied length of pin probe 6, 7, and 8 mm, equal rotational speed of 2500 rpm, and welding speed (15 mm/minutes). The Inter-metallic compounds of aluminums sheet was cut off the pin probe and the mixture on the Carbon steel ST 37. Intermetallic compounds were analyzed on its micro sructure in this region aluminum and carbon steel mixed, the value joint tensile shear 6.2KN.
PENGARUH TEMPERATUR CETAKAN TERHADAP STRUKTUR MIKRO DAN KEKERASAN PISTON HASIL PENGECORAN MENGGUNAKAN 3D PRINTING Devi Andriani; Wahyono Suprapto; Yudy Surya Irawan; Alfeus Sunarso
Jurnal Rekayasa Mesin Vol. 14 No. 1 (2023)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v14i1.1136

Abstract

Motorcycle users in 2019 reached 133,617,012 units in Indonesia. The impact of a large number of motorcycle certainly attracts the interest of the industry to produce two-wheeled automotive vehicles. The piston is part of the engine that functions as a compression barrier in the combustion chamber, the piston material is aluminum alloy. Therefore, research was carried out on making pistons with investment casting methods, physical and mechanical patterns from 3D printers on pistons. This research starts from drawing the piston using CAD (computer-aided design), making a printed pattern from a 3D Printer machine with PLA (polylactide acid) material. The mold pattern is coated with a mixture of gypsum cement and silica powder. The casting process with a pouring temperature of 750ᵒC and a mold temperature of 200 ᵒC, 250 ᵒC, 300 ᵒC, 350 ᵒC, and 400 ᵒC. The results showed the largest grain size at a mold temperature of 400ᵒC. The highest hardness at 200 ᵒC mold temperature is 47.00 HRB and the lowest hardness at 400 ᵒC mold temperature is 40.56 HRB. The higher the temperature of the mold used, the level of porosity of a material will decrease. This is due to the temperature difference when pouring the molten metal and the lower mold temperature. This makes the metal solidification time longer. The higher the mold temperature, the slower the solidification time, the larger the grain structure, and the decreased hardness.
Co-Authors Achmad Noerkhaerin Putra Agung Sugeng Widodo Ahmad Multazam, Ahmad Ahmad Robittah Alfeus Sunarso Anindito Purnowidodo Devi Andriani Dicky Adi Tyagita Djarot B. Darmadi Dwi Prasetyo Fauzi, Yusuf Rizal Imammuddin, Azam Muzakhim Moch. Agus Choiron Mochammad Junus Mohamad Irkham Mamungkas Pah, Jack Carol Adolf Pratikto Pratikto Pungky Eka Setyawan Putra, Muhammad Rezki Fitri Rudy Soenoko Rudy Soenoko Rudy Soenoko Sabitah, A'yan Setiawan, Widia Slamet Wahyudi Sonief, Achmad As'ad Sonief, Achmad As’ad Sri Mulyo Bondan Respati Sudjito Soeparman Tawaf, Nanang Teguh Dwi Widodo Tjuk Oerbandono Windi Zamrudy Wirawan , Willy Artha Yudy Surya Irawan Yurianto Yurianto Yustian Bella