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All Journal Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Rekayasa Mesin Journal of Engineering and Management in Industrial System Journal of Environmental Engineering and Sustainable Technology Journal of Energy, Mechanical, Material and Manufacturing Engineering Pilar Teknologi : Jurnal Penelitian Ilmu-ilmu Teknik International Journal of Mechanical Engineering Technologies and Applications (MECHTA) GMPI Conference Series
Yudy Surya Irawan
Jurusan Teknik Mesin Fakultas Teknik Universitas Brawijaya
Humanities Automotive Engineering Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Physics Social Sciences

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Tensile Strength and Macro-microstructures of A6061 CDFW Weld Joint Influenced by Pressure and Holding Time in the Upset Stage Abdulla, Farg Abdulla M; Irawan, Yudy Surya; Darmadi, Djarot Bangun
Jurnal Rekayasa Mesin Vol 9, No 2 (2018)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (436.905 KB) | DOI: 10.21776/ub.jrm.2018.009.02.12

Abstract

This paper aims to analyze the effect of pressure and holding time in the upset stage on tensile strength and macro-microstructures of continuous drive friction welded (CDFW) joints of aluminum alloys A6061. Friction weld specimens were welded using variations of upset pressure (40, 80, 120 MPa). The upset holding time was varied from 3, 10, to 20 seconds. Tensile strength test was conducted based on the AWS standard. The result showed that the higher upset pressure and the longer holding time in the upset stage are able to reduce the porosity of the CDFW weld joint and cause a higher tensile strength of the specimens. Meanwhile, from macro-mic restructures observation results, it was found that the specimen with maximum tensile strength has a wider partly deformed area (ZPD) and finer grains in the center of the specimen longitudinal section compared to those of the specimens with minimum tensile strength. It was occurred due to plastic deformation as the result of the higher pressure and the longer holding time in the upset stage. Fracture surface observation results indicate that in the specimen with a higher upset pressure and a longer holding time, has inflated fracture surface and the fracture zone exists in the heat affected zone, not in the interface like that of the specimen with lower tensile strength due to the lower upset pressure and the shorter holding time.
Pengaruh Temperatur Pelat Landasan Selama Proses Friction Stir Welding Terhadap Kekuatan Tarik Sambungan Las Lembaran HDPE Setiawan, Agus; Irawan, Yudy Surya; Purnowidodo, Anindito
Jurnal Rekayasa Mesin Vol 2, No 3 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The purpose of this study was to determine the weld ability of HDPE sheets (High Density Polyethylene) through the method of welding FSW (Friction Stir Welding). FSW is a new welding process, where joined of the material occurs in the solid state. Samples were welded with vertical milling CNC machines, while the type of connection is a butt joint. This study used three process parameters, two parameters are combined and one parameter value is constant, the parameters combined are temperature backing plate (30; 70; 110 and 150 oC) and the welding tool rotation speed (2200; 2300 and 2400 rpm), while the parameters with constant value is the welding speed (30 mm / min). In this research experiment conducted observations and analysis of surface textures welded joints, weld surface temperature during the process in front of and behind the welding tools, macro-structure of the welded joints, the maximum tensile strength and fracture tensile test results. From the results of this study was obtained that temperature backing plate during FSW process affects the maximum tensile strength and homogeneity of HDPE sheets welded joints. The maximum tensile strength of welded joints higher is 28.52 MPa or 95.07% of the maximum tensile strength of HDPE material, the maximum ultimate tensile strength values were obtained on the condition temperature backing plate t = 150 oC and the welding tool rotation speed n = 2300 rpm. Heating the material HDPEby backing plate during FSW process insulator properties of the material that is an obstacle inthe process of forming a perfect weld can be resolved.Keyword: temperatur backing plate, friction stir welding, the tensile strength of welded joints,HDPE sheets.
Pengaruh Sudut Chamfer Dan Gaya Tekan Akhir Terhadap Kekuatan Tarik Dan Porositas Sambungan Las Gesek Pada Paduan Al-Mg-Si. Santoso, Eko Budi; Irawan, Yudy Surya; Sutikno, Endi
Jurnal Rekayasa Mesin Vol 3, No 1 (2012)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

to aluminum properties that make difficulty to produced good well joints.To overcome this problem,in this study,chamfer angles were used on both contact surfaces of friction welding specimens. Used chamfer angles were 15 0,30 0 45 0, 60 0 and 75 0, variation of upset load were 157 kgf, 185 kgf and 213 kgf. Specimen were friction welded with rotational speed of 1600 rpm, compressive force of 123 kgf for 120 seconds. Then porosity testing and tensile strength testing were performed. Result showed that tensile strength of friction welding joint becomes higher with decreasing of chamfer angel and increasing of upset load. Specimen with chamfer 15 0 and upset load of 213 kgf has maximum tensile strength of 140,45 MPa. Specimen with chamfer angel 75 0 and upset loading of 213 kgf has the smallest porosity of 0,21 %. Keywords: tensile strength, porosity, friction welding, chamfer angle, upset load and Al-Mg-Si
Reaksi Cairan Jeruk Lemon (C6H8O7) dan NaoH terhadap Tegangan dan Arus yang Dihasilkan dengan Penambahan Katalis Karbon Aktif Amiruddin, Muhammad Agung; Irawan, Yudy Surya; Wardana, I Nyoman Gede
Rekayasa Mesin Vol 11, No 1 (2020)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jrm.2020.011.01.13

Abstract

Lemon is an environmentally friendly electrolyte. However, an innovative concept is needed to improve the quality of lemon electrolytes. The purpose of this study is to investigate the effect of activated carbon catalyst addition on the voltage and current electric generated from liquid lemon (C6H8O7) and NaOH. Lemon juice group containing acetone (C3H5O) and 3 carboxylic acid group (COOH). The experimental study was performed using voltaic cells. The data measured is 125 ml of an electrolyte solution of lemon juice (C6H8O7) and NaOH 10 grams. To the solution was added 5 grams, 7.5 grams and 10 grams of activated carbon catalyst. The results showed that the addition of activated carbon can accelerate the breaking molecular bond NaOH and C3H5O (COOH)3 which decomposes into ions react with NaCH2COO + and Cu 2+ cathode into a reductant then OH- from NaOH reacts with the anode Zn2++2e be the oxidant While H2O react exothermically. Produces a voltage between 800-1130 mV second. It occurs when electrons flow from the anode interested Zn2+ + 2e react with H2O and of  Zn2+ + 2e electrons pass led and resistor toward the cathode Cu2+. Cathode Cu 2+ reacts with C6H8O7 and NaOH. The currents that produced ranged from 33.846 to 43.462 mA second. The mechanism of this voltage and current generation makes LED light was on.
EXPERIMENTAL STUDY ON MOLD-LAY FILAMENT INSTEAD OF WAX IN INVESTMENT CASTING PROCESS Kusyairi, Imam; Himawan, Helmy Mukti; Choiron, Moch. Agus; Irawan, Yudy Surya; Safari, Rachmat; Djuanda, Dagus Resmana
Journal of Energy, Mechanical, Material, and Manufacturing Engineering Vol 5, No 1 (2020)
Publisher : University of Muhammadiyah Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (736.278 KB) | DOI: 10.22219/jemmme.v5i1.10602

Abstract

Metal casting with investment casting method is metal casting which has the ability to produce accurate parts and has a controlled fineness. Current technological developments are very influential in the development of investment casting. One of them has been found mold-lay filament as a substitute for wax, which is now wax is one of the main components in investment casting process. Mold-lay filament is printed using a 3D Printer machine. In this study, the wax in the investment casting process was replaced by a mold-lay filament with the specifications 0.75kg / 0.55 lb of 1.75mm MOLDLAY filament, prints at temperatures of 170-180° C. The result show that mold-lay flutes are also able to come out well from slurry molds, but require more time than wax, this is because one of the plastic mold-lay compositions, which takes a long time for the moldlay fillment to come out of the mold. Further research suggestions are needed further testing in terms of roughness of the product with moldlay filament and compared with wax. This will also see if there are any remaining moldlay filaments from the mold.
Pengaruh Kuat Arus Dan Campuran Gas Argon – Co2 Pada Pengelasan Gmaw Terhadap Kekuatan Tarik Dan Impact Pada Baja Karbon Medium Fasa Ganda Suyono, Eko Hendry; Irawan, Yudy Surya; Purnowidodo, Anindito
Jurnal Rekayasa Mesin Vol 2, No 2 (2011)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

The function of shielding gas is the most importance in gas metal arch welding, because it protected the oxidation from out side. Argon and CO2 are the shielding gas that often used, choosing the CO2 on mixing shielding gas for some reasons that is readystock , cheap and good penetration.The aim of this research are to know the influence of welding current and mixing shielding gas Argon – CO2 against tensile strength and impact strength on weld of medium carbon steel dual phase. The method of this research as follow AISI 1045 steel forged on temprature 900°C - 950°C then dual phase on 770°C holding tome 90 minutes as dependent variables. The Welding currents are 80A, 100A and 120A , mixing shielding gas , Argon – CO2 : ( 0 – 100%), (100% - 0) and (50% - 50%). Both are as independent variables. Tensile strength and impact strength are as fixed variables.From this research, It can be concluded that welding current and shielding gas have the influenced toward heat input and caused the weld metal fusion or unfusion. This situation influenced toward tensile strength and impact strength.It was prooved that on 80A for the 3rd shielding gas had defect (incomplete fusion and porosity) so the tensile strength and impact strength was very low. On 120A, ArCO2 mixing shielding gas had the highest tensile and impact strength because no defect in it, good fusion. Keywords: Dual phase steel, welding current, mixing shielding gas Ar – CO2, GMAW, tensile strength, impact strength
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

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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.
Pengaruh Variasi Geometri Crash Box 2 Segmen terhadap Kemampuan Menyerap Energi Impak dengan Simulasi Komputer Awali, Jatmiko; Choiron, Moch. Agus; Irawan, Yudy Surya
Jurnal Rekayasa Mesin Vol 5, No 2 (2014)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Crash box is a passive safety system placed on four wheeled vehicle, the purposes it to absorb the impact energy due to bumper no longer able hold the impact happened. There have been many studies done with the type of segment, so it needs development especially segment additional, and in this study of two segments of crash box is expected to absorb more energy, the additional of this segment purposes to increase the critical load so can be reduced the buckling. The method in this study used is ANSYS Workbench 14.5 finite element software. The variables used are the section type crash box geometry of circle, square, and hexagon, with cross section area of 1492 mm2, 1771 mm2, and 2045 mm2 and uniform height of 100 mm, the material used is aluminum AA 7003-T7. Simulation process begins when the impactor collision with speed 16 km/hour. From the research result is that moment inertia of the cross section area were able an important role in the absorption of impact energy, the cross section area 2045 mm2 were able to absorb the higher energy for each type of crash box, and the section of hexagon term that can absorb highest impact energy.Keywords: Crash Box, Simulation, Energy, Section, Two Segments
Pengaruh Fraksi Volume Serat Pelepah Gebang (Corypha Utan Lamarck) Terhadap Sifat Mekanik Pada Komposit Bermatrik Epoksi Johanis Abanat, Jufra Daud; Purnowidodo, Anindito; Irawan, Yudy Surya
Jurnal Rekayasa Mesin Vol 3, No 2 (2012)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

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Abstract

Buri Palm trees (Corypha Utan Lamarck) is one of the many types of flora in Indonesia that has not been used optimally. At the leaf midrib of buri palm has fibers that have not been developed from the engineering side. There for in this study used buri palm leaf midrib fiber as an alternative reinforcement material for manufacturing of epoxy composites that can be useful for manufacturing the body of boat, the interior of boat and also for helmets. Thus, this study aims to determine the tensile strength and impact strength of the material in accordance with the desired application. Before being used the fiber from the buri palm leaf midrib should be tested of the tensile strength and the data obtained at 182,24 MPa. Then also tested Alkali treated fiber NaOH 5% and a maximum tensile strength obtained is 212,29 MPa on the sample by treatment for 2 hours. Base on these preliminary data then manufacturing of composite samples using fibers of alkaline NaOH 5% treatment for 2 hours. Variations of fiber volume fraction are from 0%, 10%, 20%, 30%, 40%, 50%, 60% and 70%. The tensile testing sample based on the ASTM D638-3 standard and impact test samples according to ISO 179-1 standard. From the test results is known that the tensile strength of composites increases with increasing fiber volume fraction up to 70% of fiber that is equal to 51,993 MPa. Impact strength also increased up to 70% fiber volume fraction and the maximum impact strength occured is 6,953 J.Keywords: composite, buri fiber, epoxy, volume fraction
Pengaruh Perendaman Serat Sabut Kelapa Pada Air Batu Kapur Terhadap Wettability Sutrisno, Sutrisno; Soenoko, Rudy; Irawan, Yudy Surya; Widodo, Teguh Dwi
JURNAL PILAR TEKNOLOGI : Jurnal Ilmiah Ilmu Ilmu Teknik Vol 5, No 1 (2020): JURNAL PILAR TEKNOLOGI
Publisher : LPPM Universitas Merdeka Madiun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33319/piltek.v5i1.47

Abstract

Abstract— Processing of natural fibers as a support material for composite materials has been widely carried out. Some studies use chemicals as a medium for processing fiber while the treatment with natural ingredients has not been done much. This study discusses the ability of the matrix to penetrate the coconut fiber. Coconut fiber that has been cleaned soaked in a solution of limestone water. Immersion is done with a variation of the lime mass percentage of 0; 2.5; 5; 7.5; 10% with 8 hours soaking time. The matrix used is unsaturated polyester yucalac 157 BQTN-EX. Wettability testing by dripping a matrix on coconut fiber. Coconut coir fibers that have been dripped with a matrix in the photo to determine the contact angle. The results of measurements and observations that with variations in mass percentage of 5% limestone with an immersion time of 8 hours have a contact angle of 11O˂Φ˂31O. Immersion with a percentage of 2.5% shows the surface of the fiber has not changed. Immersion of 7.5% and 10% of the surface of the fiber has been damaged, so the matrix can not absorb the coconut fiber to the maximum. Keywords—: coconut fiber; limestone water; contact angle; wettability; SEM.
Co-Authors Abdulla, Farg Abdulla M Achmad As’ad Sonief Achmad Noerkhaerin Putra Agung Sugeng Widodo Agus Setiawan Alfeus Sunarso Amiruddin, Muhammad Agung Anindito Purnowidodo Arief, Saifullah Dagus Resmana Djuanda Darmadi, Djarot Bangun Devi Andriani Dian Fitria Agus Aristiyono Dicky Adi Tyagita Djarot B. Darmadi, Djarot B. Djuanda, Dagus Resmana Dwi Prasetyo Eko Budi Santoso Eko Hendry Suyono Endi Sutikno Fauzi, Katanda Fajar Helmy Mukti Himawan Helmy Mukti Himawan, Helmy Mukti Heru Suryanto Hidayati, Nafisah Arina I Nyoman Gede Wardana Ihsan, Muhammad Alif Imam Kusyairi Imam Kusyairi, Imam Ishardita Pambudi Tama Jatmiko Awali Jatmoko Awali Josef Matheus Jufra Daud Johanis Abanat Kris Witono Kustriyanto, Eddy Kustriyanto, Eddy Kusumaningdyah, Widha Moch. Agus Choiron Moch. Agus Choiron Mochammad Hannats Hanafi Ichsan, Mochammad Hannats Muharom Muharom Murti Astuti Musyaffa, Dzikri Amali Nadya, Mesti Nanse Henny Pattiasina Pah, Jack Carol Adolf Pambuditama, Ishardita Pratikto Pratikto Pungky Eka Setyawan Rachmat Safari Roesiana Dewi, Aisshah Rudy Soenoko Rudy Soenoko Rudy Soenoko Safari, Rachmat Sanjiwani, Yudistira Sri Mulyo Bondan Respati Sudjito Soeparman Sutrisno Sutrisno Sutrisno, Sutrisno Taryono, Taryono Teguh Dwi Widodo Tjuk Oerbandono Venusa Abriandika Wahyono Suprapto Wakhidah, Delia Hani Yeni Sumantri