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All Journal ROTOR: JURNAL ILMIAH TEKNIK MESIN Journal of Mechanical Engineering Science and Technology STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal Elemen Agroteknika Mechanical Engineering for Society and Industry Automotive Experiences Journal of Fibers and Polymer Composites Medani : Jurnal Pengabdian Masyarakat Jurnal Polimesin
Salahuddin Junus
Teknik Mesin Fakultas Teknik Universitas Jember
Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Transportation

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PENGARUH BESAR ALIRAN GAS TERHADAP CACAT POROSITAS DAN STRUKTUR MIKRO HASIL PENGELASAN MIG PADA PADUAN ALUMINIUM 5083 Junus, Salahuddin
ROTOR Vol 4, No 1 (2011)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (505.687 KB)

Abstract

The amount of gas flow speed is a parameter of classification that can affect the quality of results of the classification and structure of the micro. One of the functional use of protective gas to protect the molten metal (weld pool) of elements in atmosfer. The use of high-speed gas flow is used to examine the influence of gas flow to the disabled porosity that occurred in the classification of MIG on aluminum alloy 5083. There are three variations gas flow speed is used to examine the influence of impaired quality of welded porosity that occurred in the classification of MIG. Test results obtained by the largest defect porosity occur at the speed of gas flow 12 liters/minute with a density of 2.2 g / cm ³ and the porosity as much as 46% with the lowest value of pull strength 51.150 MPa. Grants flow speed gas is an increasingly large number of particles of magnesium silicate (mg2si) and will mg2al3 reliability increased material, the content of zirconium (Zr) and some titanium (Ti) role as the resultant refiner details (grain-refiner), increased levels of refinement details with increasing heat input and speed welding. Keywords: aluminium welding 5083, gas flow, radiography test, penetran test, density, porosity, tensile strenght, micro structure
KARAKTERISTIK PHISIK DAN STRUKTUR MIKRO KOMPOSIT LOGAM ALUMINIUM-GRAFIT HASIL PROSES METALURGI SERBUK Pramono, Agus; Junus, Salahuddin
ROTOR Vol 4, No 1 (2011)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (335.758 KB)

Abstract

Composite graphite alluminium represent the material with the nature of good mechanic and also light mass so that able to economize the fuel. Composite graphite alluminium made with the method of powder metallurgy with the step of making mixing powder, compaction and sintering. Composite this upon which for the application of bearing self-lubricating, so that have to measure up to the high mechanic. Nature of the will not be reached when matrix by reinforce do not tying. To improve that matter, need the drenching and detention of time sintering. This research use the volume faction 92% alluminium and 8% graphite and 10% Magnesium as wetting agent. At drenching process conducted by a graphite veneering as reinforce use the condensation HNO3 to yield metal oxide which variation 20 ml, 40 ml and 50 ml HNO3 with the time sintering 15 minute, 30 minute and 60 minute. At this research done by examination density, porosity and micro structure perception. Result of research indicate that the time hold up the sintering progressively mount hence density go up and porosity descend so that yielded a closer micro structure but accompanied also deffect becoming initial crack from composite material, optimum variable yielded at 20 ml HNO3 and time sinter 60 minute with the value density 2,48 g /cm3 and porosity 17,2 %. Keywords: composite, sintering and powder metallurgy
PENGARUH WAKTU AGING TERHADAP KEKERASAN DAN STRUKTUR MIKRO KOMPOSIT Al-Si-Mg/Al2O3 DENGAN METODE STIR CASTING Junus, Salahuddin; Zulfia, Anne; Melisa, Melisa; Mariani, Lilis
ROTOR Vol 7, No 2 (2014)
Publisher : ROTOR

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (237.589 KB)

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
KARAKTERISTIK PHISIK DAN STRUKTUR MIKRO KOMPOSIT LOGAM ALUMINIUM-GRAFIT HASIL PROSES METALURGI SERBUK Agus Pramono; Salahuddin Junus
ROTOR Vol 4 No 1 (2011)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (335.758 KB)

Abstract

Composite graphite alluminium represent the material with the nature of good mechanic and also light mass so that able to economize the fuel. Composite graphite alluminium made with the method of powder metallurgy with the step of making mixing powder, compaction and sintering. Composite this upon which for the application of bearing self-lubricating, so that have to measure up to the high mechanic. Nature of the will not be reached when matrix by reinforce do not tying. To improve that matter, need the drenching and detention of time sintering. This research use the volume faction 92% alluminium and 8% graphite and 10% Magnesium as wetting agent. At drenching process conducted by a graphite veneering as reinforce use the condensation HNO3 to yield metal oxide which variation 20 ml, 40 ml and 50 ml HNO3 with the time sintering 15 minute, 30 minute and 60 minute. At this research done by examination density, porosity and micro structure perception. Result of research indicate that the time hold up the sintering progressively mount hence density go up and porosity descend so that yielded a closer micro structure but accompanied also deffect becoming initial crack from composite material, optimum variable yielded at 20 ml HNO3 and time sinter 60 minute with the value density 2,48 g /cm3 and porosity 17,2 %. Keywords: composite, sintering and powder metallurgy
PENGARUH WAKTU GESEK FRICTION WELDING TERHADAP KARAKTERISASI BAJA AISI 1045 DENGAN SUDUT CHAMFER 15 DERAJAT Riko Septian; Gaguk Jatisukamto; Salahuddin Junus
ROTOR Vol 9 No 2 (2016)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (233.081 KB)

Abstract

Friction welding is a technique by rubbing between two metal surfaces to produce a heat source, causing the union between the two metal surfaces without using filler metal. The purpose of this research is to improve the mechanical strength of metal welded joints 1045. The research method is done by rubbing between the two metal surfaces with the time variation of friction 25 seconds, 35 seconds, 45 seconds and 55 seconds. Friction time in 45 seconds able to get the highest tensile strength about 703,835 N/mm2 and get fracture in main metal. In other, at the time of friction 25 seconds reach its low tensile strength about 429,671 N/mm2 and occured a fracture in connection welds. Best hardness distribution obtained at the time of friction 55 seconds with a value of 270 BHN in hardness weld metal, the hardness value inleft part of HAZ reach 252 BHN and hardness value of right part of HAZ reach 247.6 BHN. Lowest hardness obtained at Friction time in 25 seconds with welding metal hardness of 250 BHN, hardness value in left side HAZ reach 240.3 BHN and the right sideof reach 236.6 BHN. Time friction affect to the microstructure and mechanical properties of AISI 1045. Smaller crystal structure will be block the movement of the dislocation, so that the mechanical properties of the metal are getting better, and conversely when crystal structuresare formed getting greater, the mechanical properties of the material will decreases. Keywords: friction welding, friction time, tensile strength, hardness, metallography.
PENGARUH BESAR ALIRAN GAS TERHADAP CACAT POROSITAS DAN STRUKTUR MIKRO HASIL PENGELASAN MIG PADA PADUAN ALUMINIUM 5083 Salahuddin Junus
ROTOR Vol 4 No 1 (2011)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (505.687 KB)

Abstract

The amount of gas flow speed is a parameter of classification that can affect the quality of results of the classification and structure of the micro. One of the functional use of protective gas to protect the molten metal (weld pool) of elements in atmosfer. The use of high-speed gas flow is used to examine the influence of gas flow to the disabled porosity that occurred in the classification of MIG on aluminum alloy 5083. There are three variations gas flow speed is used to examine the influence of impaired quality of welded porosity that occurred in the classification of MIG. Test results obtained by the largest defect porosity occur at the speed of gas flow 12 liters/minute with a density of 2.2 g / cm ³ and the porosity as much as 46% with the lowest value of pull strength 51.150 MPa. Grants flow speed gas is an increasingly large number of particles of magnesium silicate (mg2si) and will mg2al3 reliability increased material, the content of zirconium (Zr) and some titanium (Ti) role as the resultant refiner details (grain-refiner), increased levels of refinement details with increasing heat input and speed welding. Keywords: aluminium welding 5083, gas flow, radiography test, penetran test, density, porosity, tensile strenght, micro structure
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (237.589 KB)

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
Experimental Study on the Effect of Nano Additives γAl2O3 and Equivalence Ratio to Bunsen Flame Characteristic of Biodiesel from Nyamplung (Calophyllum Inophyllum) Setyo Pambudi; Nasrul Ilminnafik; Salahuddin Junus; Muh Nurkoyim Kustanto
Automotive Experiences Vol 4 No 2 (2021)
Publisher : Automotive Laboratory of Universitas Muhammadiyah Magelang in collaboration with Association of Indonesian Vocational Educators (AIVE)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (989.874 KB) | DOI: 10.31603/ae.4569

Abstract

Nano γAl2O3 has been one of the nanometal oxides that has improved the characteristics of biodiesel. The effect of γAl2O3 nanoparticles addition on premixed flame combustion is investigated with an experiment on the laminar flame speed of Calophyllum inophyllum methyl ester 30% and 70% petrodiesel mixtures, at atmospheric pressure and preheated temperature T = 473K. The γAl2O3 nanoparticles added to CIME30 biodiesel were 0ppm, 100ppm, 200ppm, and 300ppm. Experiments were carried out on a bunsen burner. The equivalent ratio of the mixture between ϕ = 0.67 to 1.17. Experiments revealed that the addition of nanoparticles to CIME30 biodiesel expands the flammability limit and increases the laminar flame speed. CIME30 without nanoparticles, flame stable between ϕ = 0,76 -1,17. CIME30 with nanoparticles, flame stable between ϕ = 0,67 -1,17. Combustion of CIME30 required a lot of air. The highest laminar flame speed occurred at the equivalent ratio ϕ = 0.83. The highest laminar flame speed of CIME30 0, 100, 200, and 300 ppm were 30.77, 34.50, 35.90, 38.45 cm/s respectively. The higher the nano γAl2O3 concentration the higher the laminar flame speed. This occurs due to the catalytic effect of γAl2O3 on biodiesel and its mixtures.
PENGARUH FRAKSI VOLUME FIBER GLASS TERHADAP SIFAT MEKANIK KOMPOSIT FIBER GLASS/EPOXY DENGAN METODE VARI Mohammad Alfian Ilmy; Ahmad Adib Rosyadi; Salahuddin Junus
STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 1 No 1 (2018): JURNAL STATOR
Publisher : STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin

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Abstract

The purpose of this study was to determine the optimal volume fraction in obtaining the highest tensile strength and impact resistance. In this study, the composite material consisted of an Epoxy AB777 resin as a matrix and 300 mat fiberglass as a reinforcement, with variations in vacuum pressure (0.2 and 0.5 bar) as well as fiberglass volume fraction (Vf = 30%, 35%, 40%, 45 %, 50%) to tensile strength and impact resistance. Application of Vacuum Assisted Resin Infusion (VARI) method is by drain the resin into the reinforcement which is placed in airtight mold by using vacuum pump. From the test result, the highest tensile strength is owned by composite with Vf 50% and 0.5 bar pressure is 138,18 MPa and the lowest is owned by Vf 30% with pressure 0,2 bar is 96,60 MPa. While the highest impact resistance is owned by a composite with Vf 45% with a 0.5 bar pressure is 0.191 J / mm2 and the lowest one is owned by Vf 30% with a 0.2 bar pressure is 0.098 J / mm2. It can be concluded that, (1) Greater the vacuum pressure used, greater the mechanical strength of the composite. (2) Greater the fiber volume fraction, will increase the tensile strength of fiberglass / epoxy composites. However, 45% fiber volume fraction is the optimum volume fraction for composite impact resistance. Keywords: Fiberglass / Epoxy Composite, Mechanical properties, VARI.
PENGARUH PENAMBAHAN Mg DAN Sr TERHADAP KEKERASAN KOMPOSIT ADC12/nano-Al2O3 DENGAN METODE STIR CASTING Ahmad Al Kautsar; Salahuddin Junus; Aris Zainul Muttaqina
STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Vol 1 No 1 (2018): JURNAL STATOR
Publisher : STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin

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Abstract

Metal matrix composites generally use Aluminum (Al) as its matrix because of its low density, high processing, and high ductility. Ductility is an important factor that must be possessed on the metal matrix composite because the amplifier used is rigid and brittle. Alumina (Al2O3) is used as a reinforcing particle in a metal matrix composite because it has good thermal stability and hardness as well as a high Young modulus. Aluminum-silicon alloys (Al-Si) are excellent alloys of good melting, which have a good surface, without brittleness, and are excellent for cast alloys. The addition of magnesium (Mg) resulted in a modified rate of silicone eutectic for Al-Si-Mg, with enhanced magnesium (Mg) levels, increased alloy tensile strength but a decreasing percent elongation value. Strontium (Sr) is a common element used to modify eutectic and Si-shaped phases of rough acicular into finer and rounded fibrous forms. A metal matrix composite with a nano-sized Al2O3 particle amplifier can be fabricated using stir casting method with the addition of Mg as a Al2O3 wetting agent. Test results of the addition of Mg, Sr, and nano-Al2O3 to the highest hardness of ADC12 / nano-Al2O3 composites were found in ADC12-8Mg-0.03Sr / 2.5nano-Al2O3 variation at 78.92 HRB. Keywords : Composite Al/nano-Al2O3, alumina, magnesium, strontium, stir casting, hardness
Co-Authors Achmad Murdiono Afril Priyanto Agung Budi C Agung Budi Cahyono Agus Pramono Agus Triono Ahmad Adib Rosyadi Ahmad Al Kautsar Ahmad Al Kautsar Ahmad Wafi Alahmadi, Mohammed Alfi Hasan Andi Sanata Andi Sanata Anne Zulfia Anuary Dwi Rosyid, Wafa Prasetia Aris Zainul Muttaqin Aris Zainul Muttaqin Bambang Sugiharto Danang Yudistiro Dedi Dwi Laksana Dedi Dwilaksana Deny tomy andrianto Devita Amelia Digdo Listyadi, Digdo Dwi Djumhariyanto Gaguk Jatisukamto Gindeka Bimara Aryantaka Haidzar Nurdiansyah Hary Sutjahjono Ilminafik, Nasrul Ilyas, Rushdan Ahmad Imam Rudi Sugara Imam Sholahuddin Imam Sholahudin Intan Hardiatama Jannah, Betriqil Koekoeh KW, Robertoes L Rajeshkumar Lilis Mariani Lilis Mariani, Lilis M Edoward Ramadhan M Trifiananto M. Fahrur Rozy M. Fahrur Rozy Hentihu m. Fahrur Rozy R M. R. M. Asyraf M.Ginanjar Widodo Mukti Mahros Darsin Masfeya Eka Hermiansyah Melbi Mahardika Melisa Melisa Mochamad Asrofi Mochammad Edoward R Mohammad Alfian Ilmy Muh Nurkoyim Kustanto Muh Nurkoyim Kustanto Muhammad Abduh Muhammad Kurniawan Nashrullah, M Dimyati Nasrul Ilminnafik Nasution, Annio Indah Lestari Novi Nur H Novi Nur Hamimah Pieter Muhammad Iko Marrendra Pradiza, Revvan Rifada Puranggo Ganjar Widityo Puranggo Ganjar Widityo R. A. Ilyas Rahma Rei Sakura Rahman, Purnama Auliya Rahmatullah Tites Wicaksono Ramadhan, M Edoward Reza Marinanda Fajar Rika Dwiqoryah Riko Septian Riko Septian Rizky Akhmad Prayogi Robertoes Koekoeh KW Robertus Sidartawan Robertus Sidhartawan Santoso Mulyadi Setyo Pambudi Setyo Pambudi Sujito Sujito Sumardi Sumardi Sumarji Syuhri, Skriptyan Noor Hidayatullah Taufik Taufik Wiradika, Yudha Wisnu Kuncoro Yanuar Alditya Nugraha Yayang Saif Izzudin Yudhistiro, Danang Yuni Hermawan