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ROTOR: JURNAL ILMIAH TEKNIK MESIN
Published by Universitas Jember
ISSN : 1979018x     EISSN : 24600385     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering
ROTOR merupakan jurnal yang diterbitkan oleh Jurusan Teknik Mesin Universitas Jember yang memuat artikel ilmiah dalam bidang Konversi Energi, Design/Perancangan, Teknik Produksi, Material serta bidang lain yang terkait dengan Teknik Mesin. Semua naskah yang diterima ROTOR diterbitkan secara global dalam bentuk elektronik. Hasil penelitian yang diterbitkan dalam jurnal ini diharapkan dapat menambah khasanah pengetahuan di bidang Teknik Mesin serta menjadikan sarana bagi para profesional baik dari dunia usaha, pendidikan, ataupun peneliti untuk menyebarluaskan perkembangan ilmu pengetahuan dan teknologi di bidang Teknik Mesin melalui publikasi hasil penelitian.
Arjuna Subject : Teknik (semua kategori) - Teknik Mesin
Articles 333 Documents
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ANALISIS SIFAT MEKANIK DAN STRUKTUR MIKRO ALUMINIUM PADUAN Al-Mg-Si HASIL PENGELASAN FRICTION WELDING DENGAN VARIASI KECEPATAN PUTAR Setyawan F.W.; Dedi Dwilaksana
ROTOR Vol 7 No 2 (2014)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

All metals can be done, but welding on some metals, especially aluminum alloys with certain hard to do welding . Various ways and development has been carried out to obtain an alternative method which can connect the hard metal welded. Friction welding (friction welding) is one of the solutions to solve difficult problems connecting metal done with fusión welding (welding liquid). Greatly affect the temperature distribution of welding friction welding results, by varying the rotational speed of the obtained heat more evenly. So that welding can be achieved maximal results. From the results of the largest study of tensile strength at a speed of 1169 rpm is 18.67 MPa, while the tensile strength of the lowest rotational speed of 867 rpm is 16.38 MPa. For the highest hardness values contained in the base metal region (Zud) is 114.5 VHN. while the lowest violence occurred in the HAZ (ZPD) is 52.28 VHN. Keywords: friction welding, rotation speed, hardness, Al-Mg-Si
PENGARUH WAKTU AGING TERHADAP KEKERASAN DAN STRUKTUR MIKRO KOMPOSIT Al-Si-Mg/Al2O3 DENGAN METODE STIR CASTING Salahuddin Junus; Anne Zulfia; Melisa Melisa; Lilis Mariani
ROTOR Vol 7 No 2 (2014)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

Aluminum composite needs proper aging period to achieve its optimum mechanical properties through  precipitation hardening process. In this research, alumina (Al2O3) particulate reinforced aluminum alloy 6061 composite which is fabricated by stir casting method, undergoes T6 treatment in 175°C for 2 hours, 4 hours, 6 hours, and 8 hours. Mechanical properties evaluations such as tensile testing, hardness testing,  and wear rate testing; also microstructure and SEM observation are conducted. Research shows that the  optimum  artificial aging period for the aluminum composite is 6 hours in 175°C. Wear rate decreases after T6 treatment  applied. Hardness  increases after T6 treatment applied with aging period of 4 and 6 hours. Tensile strength decreases compared to as-cast composite due  to  formation  of  void  at  interface  when T6 treatment conducted. Manufacturing factors will affect the mechanical properties of composite. Keywords: Aluminum composite, billet Al.6061, T6, aging period, stir casting
FABRIKASI DAN KARAKTERISASI NANOGENERATOR BERBASIS NANOFIBER-NANOWIRE ZnO Imam Sholahuddin; M. Fahrur Rozy Hentihu
ROTOR Vol 8 No 1 (2015)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

Fiber diffusion process when the fiber is still green on a plate collector and the thermal decomposition process followed by the formation of ZnO crystal nucleation has a very large role of the morphology of the final form of fiber products. Conversely, a positive result occurs in nanowire growth process. At the time of natural air pressure conditions and the presence of oxygen in the air in the process of sintering for 2 hours without using a catalyst, ZnO crystals can grow by itself (self-growth) into a nanowire. As a material nanogenerator, this situation provides an additional active area to excite the tap-off force into electrical voltage of up to 234.55 mV (2 μℓ / min).
STUDI PERBANDINGAN KETAHANAN KOROSI STAINLESS STEEL TIPE SS 304 DAN SS 201 MENGGUNAKAN METODE U-BEND TEST SECARA SIKLIK DENGAN VARIASI SUHU DAN PH Sumarji Sumarji
ROTOR Vol 4 No 1 (2011)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

There are many failures in a structure that is caused by the damage of the metal that support them. One of the problem which can cause the damage of the metal is corrosion. With its action, corrosion can make a metal  become thin, and in some cases can make a crack and fracture. Some factors are determine how fast the process is occured in corrosion process, for examples are the oxygen concentration, degree of acidity, and temperature. The purpose of this research is to know how is the role of that factors in corrrosion process. This research is implemented in three condision of temperatures (300 C, 500 C, 700 C), variation of HCl’s pH (0, 1, 2), and cycle environments condition. That will be combined and will be tested for about 7 days. After this execution, material will be measured for the decrease of the weight to give the value of corrosion rate. From this experiment, the rate of corrosion rises by increasing temperature and the decreasing pH condition. In all condition of this experiment, the SS 304 Stainless Steel has the better resistant to the corrosion in HCl environment.  The highest corrosion rate of cycle condition is 36.119,4 mpy for SS 201 Stainless Steel, and 515,5 mpy for SS 304 Stainless Steel. Form the micro photographs of corrosion happened on SS 201 Stainless Steel is pitting corrosion and SS 304 Stainless Steel is uniform corrosion. Keywords: Stainless Steel, Cycle and Corrosion
ANALISIS SIFAT MEKANIK HASIL PENGELASAN ALUMINIUM AA 1100 DENGAN METODE FRICTION STIR WELDING (FSW) Mahros Darsin; Sumarji Sumarji; Angger Sudrajat
ROTOR Vol 5 No 1 (2012)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

Aluminum and aluminum alloys have properties that are less well when coMPared to steel, such as specific heat and has a high conductivity. They are also easily oxidized and form an aluminum oxide Al2O3 which have a high melting point. Consequently, when they are welded the fusion between base and weld metal will be blocked. Moreover, if the cooling process is too fast it will form a smooth cavity ex-pouch of hydrogen. Friction stir welding (FSW) is a challenging alternative for joining aluminum alloy. In FSW, process occur in the solid state (solid state joining). In this research, some attempts were carried out to find the best quality of welding, in term of mechanical properties and microstructure. Tool rotation speed was varied at 780, 980, 1120 rpm. Whereas, feed rate used was keep constantly at 15 mm/min. The material to be welded is a- 4.0 mm thick aluminum AA 1100 strips. Result showed that the highest strength obtained is 56.528 MPa at 1120 rpm and the lowest strength obtained is 38.472 MPa at 980 rpm. Wormholes and the lack of penetration defects are the main things that reduce the tensile strength. From micro observations known on the grains shape of the stir zone, FeAl3 particles is spread more evenly in matrix of Al  due to the stir process during the welding process. Hardness tests showed that the weld metal is softer than the base metal. Keywords: Aluminum, welding, FSW
PENGARUH VARIASI TEMPERATUR TERHADAP MASSA DAN ENERGI YANG DIHASILKAN PIROLISIS SERBUK KAYU MAHONI (SWITENIA MACROPHYLLA) PADA ROTARY KILN Ikhwanul Qiram; Denny Widhiyanuriyawan; widya wijayanti
ROTOR Vol 8 No 2 (2015)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

Pirolysis is thermochemical decomposition process of biomass into useful product. A method that can be used is a rotary kiln pirolyzer which consist a heating cylinder that rotate with a certain rotation speed. This research is aimed to get the effet of temperature due to char product quantity of switenia macrophylla rotary kiln pirolysis.The research is done by pirolysis experiment with 200 gram of switenia macrophylla in dust form. Temperature heating is varied 250 C, 350 C, 450 C, 500 C, dan 600 C. The heating temperature is provide by eletric heater with control system. Temperatur is measured with K type thermocouple. The heating process is taken for 180 minutes using stopwatch. The measurement is done for biomass and char volume using measuring cup. Mass is measured using scale. Low heating value is measured using bomb calorimeter.The result show that temperatur has effect due to char product of switenia macrophylla rotary kiln pirolysis. Char mass loss tend to increase due to temperature increasing. Low heating value and char porosity tend to increase due to mass loss percentage increasing. Shrinking factor and percentage of yield energy tend to decrease due to mass loss percentage increasing. Keywords: pirolysis, rotary kiln, char, temperature
SINTESIS BIODIESEL DARI MINYAK KESAMBI (Schleichera Oleosa L.) MENGGUNAKAN KATALIS BASA HETEROGEN DARI LIMBAH KARBIT Mohammad Syarif; Yuana Susmiati; Michael Joko Wibowo
ROTOR Vol 9 No 2 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

Biodiesel is a kind of alternative fuels to replace fossil fuels as form as diesel can be obtain through out transesterification process of vagetable oils and methanol with catalyst. One of all vegetables oil that able to use as biodiesel’s material is kesambi seeds oil. The objective of this study is to determine the number of calcium carbide residual catalyst effect to the number of biodiesel’s production. Biodiesel produce by esterification-esterification-transesterification (EET) method. Esterification process using methanol amount of 20% w/v, sulfuric acid is 5% w/v, while the reactive temperature is 60oC and stirring duration about 60 minutes. Transesterification process using methanol amount of 75% w/v while the reactive temperature is 60oC, stirring duration is 120 minutes and calcium carbide residue will be variated to 2,3,4,5 and 6% w/v. The highest biodiesel’s production in amount of 51.4% is achieved by 6% catalyst number. While the lowest number in amount of 34.32% is achieved by 2% catalyst number. R2 number is about 93% which positive correlation slope number reached 475,7x according to correlation between calcium carbide catalyst number and biodiesel’s production number. Therefore it has more and more catalyst calcium carbide residue used will obtain the greater biodiesel yield. Keywords: : Biodiesel, Kesambi seeds oil, Calcium Carbide Residue,Esterification,Transesterification
ANALISIS DIAMETER GELEMBUNG PADA KERUGIAN TEKANAN ALIRAN FLUIDA Rachmat Subagyo; I.N.G. Wardana; Eko Siswanto
ROTOR Vol 9 No 2 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

In the development of science studies have been conducted to observe the losses that occur in piping systems. During the fluid flowing through the pipe friction losses will occur between the fluid with the walls of the pipes, which are called by major losses. In general, the greater the loss of majorlosis on rough surfaces and can be reduced by using a more smooth surface such as glass, acrylic or with other coating materials. Gas bubbles that occur from the reaction of water with very influential magnesium in lowering the pressure in a turbulent flow. With the gas bubbles in the fluid flow creates the effect of two-phase flow. This study reviewed the effect of gas bubbles to the pressure drop (pressure drop) that occurs. The working fluid used is water that flowed through the channel with a square acrylic 18´9 mm size. The bottom of the channel is mounted ribbon mg powder grain size 160mm to create the effect of bubbles in the fluid flow. The powder iron (Fe) used as comparison with the same grain size. The results showed when the turbulent flow mg tape coating is more effective to reduce pressure losses due to flow into two phases and some bubbles that can survive will shrink the size of its diameter so it does not impede the flow rate. Keywords: Piping systems, major losis, bubbles of gas, two-phase flow, bubble effect.
PENGARUH SUDUT KELENGKUNGAN SUDU SAVONIUS PADA HORIZONTAL AXIS WATER TURBINE DI ALIRAN DALAM PIPA Taufan Apha Sanditya; Syamsul Hadi; D. Danardono Dwi Prija Tjahjana
ROTOR 2016: ROTOR Special Edition
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

Water turbine is a device that works to convert water energy into mechanical energy in the form of a torque in turbine shaft. In this study, the angle of attack of Savonius water turbine with horizontal axis (HAWT), simulated using “Solidworks Flow Simulation” software, is obtained by applying the model in a flow through a pipe. The angle of attack used in this simulation is varied from 110°, 120°, 130° and 140°. The aims of this research are to obtain the optimum angle of attack with a debit of 0,0122 m3/s. Then the angle of attack of the blade is evaluated based on the torque, pressure contour and fluid velocity distribution. The results show that the optimum angle of attack is found at 120° with the torque about 3,8 Nm. Keywords: picohydro, angle of attack, solidwork, savonius, torque
PENGARUH VARIASI WAKTU SHOT PEENING TERHADAP STRUKTUR MIKRO DAN KEKERASAN PERMUKAAN PADA MATERIAL IMPLAN AISI 304 Trio Nur Wibowo; Priyo Tri Iswanto; Bambang Hari Priyambodo; Nur Amin
ROTOR 2016: ROTOR Special Edition
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

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Abstract

AISI 304 stainless steel is a type of implant material with a relatively low cost. However, its mechanical properties need to be improved so it can compensate the AISI 316L and titanium alloy materials. Fatigue characteristic is also one of the important criteria that must be evaluated in order to achieve overall service performance when the material is under dynamic loads. The hardness surface and the nano-structures formation can delay the propagation of fatigue crack initiation and can reduce the corrosion rate. This study is conducted to determine the changes in microstructure and hardness of AISI 304 for shot peening process. The surface treatment by shot peening process is performed by setting the variation of the shooting time of 0, 5, 10, 20, 30 and 40 minutes at a shooting pressure of 7 bar using the Steel Shot diameter of 0.6 mm with a hardness of 40-50 HRC. The distance between the nozzle and the specimen surface is set at 100 mm. The microstructure is analyzed by optical microscope with a magnification of 100 times and photographed using optilab, which is connected to a computer. Surface hardness is tested using a Micro Vickers with indentation load of 10 grams for 10 seconds. The results show that refined microstructure layer is formed in the shot peening surface and the hardness is also increased gradually as well as shot peening time of 0, 5, 10, 20, 30 and 40 minutes. This also increase the hardness number of 241, 404, 418, 437, 481 and 496 VHN. To sum up, the shot peening can be used to refine the grain and to increase the hardness. Keywords: AISI 304, shot peening, microstructure, Vickers hardness

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