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Nevada. J. M. Nanulaitta
Jurusan Teknik Mesin, Politeknik Negeri Ambon
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ANALISA PENGARUH VARIASI KUAT ARUS PENGELASAN FLUX CORED ARC WELDING (FCAW) TERHADAP SIFAT KEKERASAN PADA DAERAH HAZ BAJA KARBON RENDAH Graciadiana. I. Huka; Josef Matheus; Nevada JM. Nanulaitta; Erwin Bravor Pattikayhatu
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2579

Abstract

Welding is a process of joining metals by utilizing electric power as a source of welding heat. Flux-Core Arc Welding (FCAW) is a welding process that uses a heat source from electricity that is converted into a heat source in an electric arc, in this FCAW welding the type of protection used is flux or powder that is in the core of the welding wire (the welding wire is rolled in a roll). This research aims to observe changes in hardness values after welding, both low carbon steel hardness in the HAZ (Heat Affected Zone) area and outside the HAZ (Heat Affected Zone) area. Welding using V-joints with angles of 45° and 60° and varying the voltage strength at 16 volts, 18 volts and 20 volts. Hardness testing using the Rockwell method where the highest hardness value of the HAZ area for 45 is 22.95 HRD at a voltage strength of 20 volts. For V-joints for an angle of 60°, the highest hardness value of the HAZ area is also at a voltage strength of 20 volts with a value of 24.10 HRD. The highest increase in hardness value is at the V-angle 60° joint with a voltage of 20 volts with a hardness value of 21 HRD while the lowest is the V-angle 45° joint with a voltage of 16 volts at 18.67 HRD. Keywords: Hardness Value, HAZ (Heat Affected Zone), FCAW (Flux Cored Arc Welding)
PENGARUH VARIASI METODE DRYING PROSES TERHADAP KEKERASAN PENGECATAN BODY KENDARAAN BERMOTOR F. Demmatacco; Hermon. Latumaerissa; J.M Nanulaita
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2582

Abstract

Coating is a process of applying paint in liquid form to an object, to create a thin layer which then forms a hard layer or paint layer. Factors that affect the quality of painting are the materials used, the viscosity of the paint, the painting temperature, and the skill in applying the paint. This study is to observe the process of changing the hardness value on the surface of the paint from coating. The drying process of painting uses 4 forms, namely drying indoors, outdoors, in an oven at a temperature of 50°C and 60°C with a mixture of paint, 100% base: 50% hardener + Thinner (10% of the base) Based on the study of the effect of the paint drying process on the hardness value of the coating, it can be concluded that the results of the average hardness value obtained, namely the use of the drying method using an oven with a temperature of 60°C has the highest hardness value of 84.10 HV followed by 82.90 HV and 81.93 HV for oven drying with a temperature of 50°C and drying indoors with a temperature of 35°C - 36°C, while the lowest hardness value is in outdoor drying with a temperature of 37°C - 39°C with a value of 80.68 HV. Keywords: Hardness Value, Coating, Temperature.
ANALISA VARIASI KAMPUH DAN ARUS LISTRIK LAS PADA MATERIAL BAJA KARBON MENENGAH TERHADAP KEKUATAN TARIK DAN STRUKTUR MIKRO SAMBUNGAN LAS Lasamahu, Stevanno B D; Huka, Graciadiana I; Nanulaitta, Nevada. JM
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study aimed to investigate the effects of weld groove variations and welding current on the tensile strength and microstructure of medium carbon steel joints using FCAW (Flux-Cored Arc Welding). The researcher employed a quantitative approach with an experimental method. The specimens used in this research include FCAW with V-groove and 90 A current, FCAW with V-groove and 70 A current, FCAW with X-groove and 70 A current, FCAW with X-groove and 90 A current, raw material specimens, and microstructure specimens. The data analysis reveals that the highest average tensile stress value among the welded specimens was 463.50 MPa, observed in the FCAW X-groove with 90 A current specimen, while the FCAW V-groove with 70 A current specimen showed the lowest value at 295.1 MPa. Regarding the strain values, the FCAW X-groove with 90 A current specimen had the lowest average strain of 4.15%, whereas the FCAW V-groove with 70 A current specimen had the highest at 5.36%. In terms of microstructure, the FCAW V-groove with 70 A current specimen exhibited martensite, pearlite, and ferrite structures in the weld zone, and ferrite and pearlite structures in the heat-affected zone (HAZ) and base metal. For the FCAW X-groove with 90 A current specimen, pearlite and ferrite structures were found in the weld zone, HAZ, and base metal. Keywords: Carbon Steel, Weld Groove, Welding Current, Tensile Test, Microstructure
ANALISA PENGARUH VARIASI KECEPATAN PUTARAN DAN FEED RATE PROSES PEMBUBUTAN TERHADAP KEKASARAN PERMUKAAN DAN LAJU KOROSI BAJA KARBON SEDANG Ramadhan, Fahri; Matheus, J; Nanulaita, Nevada. JM; Malakauseya, J. J
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2887

Abstract

a machine tool used to remove part of a rotated object is called a lathe. In the turning process, surface roughness often occurs on the workpiece, this roughness will later have an impact on the corrosion rate. In the oil and gas industry, corrosion is something that is very undesirable, because it can cause losses and also slow down a production process. This study aims to obtain the value of surface roughness and corrosion rate on medium carbon steel through the turning process with variations in rotation speed, namely at Rpm 350 and Rpm 460 with Vf 17 mm/minute, 21 mm/minute, 23 mm/minute, and 28 mm/minute. The results of this study are that the rotation speed and feed rate affect the roughness value on the surface of medium carbon steel, the average for Rpm 350 with Vf 17 the Ra value is 6.57 µm and Rz 31.2 µm, for Rpm 350 with Vf 21 the Ra value is 10.12 µm, and Rz 42.8 µm, for Rpm 460 with Vf 23 the Ra value is 6.53 µm and Rz 26.2 µm, and for Rpm 460 with Vf 28 the Ra value is 7.65 µm and Rz 34.4 µm. High Rpm but low Vf can produce lower surface roughness compared to low Rpm but high Vf. The surface roughness of the object also affects the corrosion rate, the specimen with the highest surface roughness, namely Rpm 350 with Vf 21, gets the highest corrosion rate value, namely 0.01086 mm/year. for the lowest surface roughness, namely Rpm 460 with Vf 23, gets a value of 0.00890 mm/years. it is proven that the higher the surface roughness value, the higher the corrosion rate value. Keywords: lathe, medium carbon steel, surface roughness, corrosion rate
ANALISIS SISA UMUR PAKAI PIPA PENYALUR FUEL B.35 DI PLTMG AMBON PEAKER 30 MW Leatemia, Josua M.; Nanulaitta, Nevada J.M; Pelasula, Berthy
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2888

Abstract

Pipeline systems are one way to deliver fuel from refineries to distribution points before it reaches consumers. The system consists of a number of pipes that transport the fluid over a considerable distance. An underground pipeline system is the system used in this design analysis. The technical requirements for the construction and planting of underground pipe systems will have an impact on the pipeline pressure. In this study is how to determine the Remain life of the fuel B.35 pipeline at the PLTMG Ambon Peaker 30 MW. Conducting a thickness testing method with an ultrasonic thickness gauge measuring instrument. In this test, researchers will carry out a series of stages, starting from pipe preparation and characterization to understand the initial condition of the pipeline. Afterwards, testing is carried out using an ultrasonic thickness gauge that not only focuses on the thickness of the pipe, but also on the overall structural integrity.This study was conducted by measuring the thickness of the pipe to obtain preliminary data to measure the remaining service life of the B.35 fuel distribution pipe from the holding tank to the daily tank. Measurement using ultrasonic thickness gauge. The length of the inspected pipe is 78 m divided into 13 staff, with 624 measurement points divided into 48 points per staff. The lowest remaining pipe life value is 13,5 years and the highest is in the 10th staff pipe worth 20,1 years. Keywords: pipe thickness, corrosion rate and remaining pipe service life
ANALISIS PENGARUH VARIASI ARUS PENGELASAN TERHADAP KEKUATAN TARIK DAN STRUKTUR MIKRO PADA SAMBUNGAN LAS SMAW DAN FCAW DENGAN MATERIAL BAJA KARBON RENDAH Picanussa, Jovancko. S. S.; Nanulaitta, Nevada. JM; Huka, Graciadiana I
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2889

Abstract

Carbon steel is a type of alloy steel consisting of various elements, especially iron (Fe) and carbon (C). In general, the properties of steel are influenced by the percentage of carbon and the microstructure of the steel which is influenced by the composition of the steel and heat treatment. The welding process can change the structure and composition of the steel. In this study, the welding process used is SMAW and FCAW welding. Then the testing process is carried out, namely tensile testing and microstructure to see the effect of variations in the welding current used. In this study, the author will analyze the effect of variations in welding current on tensile strength or mechanical properties as well as the structure and composition of the specimen to be tested in this case medium carbon steel. The welding methods used are FCAW (Flux Core Arc Welding) and SMAW (Shield Metal Arc Welding). The results of this study, the author found that the welding current has an effect on the tensile strength and microstructure of medium carbon steel. Where for tensile strength, the greater the welding current used, the greater the tensile strength of the specimen where the current range used must be adjusted to the thickness of the workpiece used. In FCAW 90A the value obtained is 438.30 MPa and the strain value is 6.20% and SMAW 90A the value obtained is 438.20 MPa and the strain is 7.20%. Likewise, the Pmax and ΔL values where in SMAW 90 ampere the Pmax value is 43.82 KN and ΔL 3.60mm, FCAW 90 ampere the Pmax value is 43.83 KN and ΔL 3.10mm. With this, the author concludes that with a material thickness of 8mm and a current variation of 70 amperes and 90 amperes, it was found that at a larger welding current of 90 amperes, the tensile strength obtained was greater and for the microstructure, the author found changes in the structure of the welding results in FCAW welding where in the raw material the structure found was ferrite and pearlite while for the FCAW welding results, a beanite structure was found. Keywords: Welding, tensile strength, microstructure.
ANALISA PENGARUH VARIASI PUTARAN DAN FEED RATE PADA MESIN FRAIS TERHADAP KEKASARAN PERMUKAAN DAN LAJU KOROSI PADA BAJA KARBON SEDANG Latuconsina, Muhammad Jen; Nanulaitta, Nevada. J. M.; Matheus, Josef
Journal Mechanical Engineering Vol. 2 No. 3 (2024): Desember
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i3.2890

Abstract

A milling machine or milling machine is a machine tool used in the manufacturing process to produce components or parts with the desired shape and size. Milling machines have an important role in the oil and gas industry, especially in the manufacture of components used in oil and gas industry equipment such as grooves on shafts and gears used in drilling equipment and oil and gas production are often made of medium carbon steel because of its strength and durability. This study aims to obtain roughness values and corrosion rates on medium carbon steel through the milling process with variations in rotation of 900 rpm and 1100 rpm and feed rates of 42 mm / min and 76 mm / min with dromus cooling media. The results of this study obtained the highest average roughness value at a rotation speed of 900 rpm and a feed rate of 42 mm/minute, which is 6.64 µm (Ra) and 31.1 µm (Rz), while the lowest average roughness value at a rotation speed of 1100 rpm and a feed rate of 42 mm/minute is 6.23 µm (Ra) and 30.8 µm (Rz), for a rotation speed of 1100 rpm and a feed rate of 76 mm/minute is 7.92 µm (Ra) and 37.1 µm (Rz). The higher the rotation speed and the lower the feed rate, the lower the roughness value, and vice versa. The highest corrosion rate is at 900 rpm and 76 mm/minute feed rate, which is 0.02194 (mm/y), while the lowest corrosion rate is at 1100 rpm and 42 mm/minute feed rate, which is 0.01555 (mm/y). The higher the surface roughness, the faster the corrosion rate, and vice versa. Keyword : milling machine, surface roughness, corrosion rate, medium carbon steel
ANALISA REMAINING LIFE DAILY STORAGE TANK DI PLTMG SERAM PEAKER 20 MW MASOHI – MALUKU TENGAH Kelian, Nur Aisyah Utami; Patikayhattu, Erwin; Nanulaitta, Nevada. J. M.; Leatemia, Meiti
Journal Mechanical Engineering Vol. 2 No. 2 (2024): Agustus
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i2.2911

Abstract

Increased global energy demand has resulted in rapid growth in the oil and gas industry, including in Indonesia. Storage tanks play an important role in the storage of large quantities of liquids and must comply with strict technical standards and government regulations, such as American Petroleum Institute (API) 650, 653, and 575 and Permen of ESDM No. 32 of 2021. Seram Peaker 20 MW Masohi-Maluku Tengah MHP, as a vital asset for providing electrical energy, has a fuel storage tank that has never been inspected since the beginning of its operation. Non-compliance with API 653 standards potentially poses a risk of structural damage, leakage, and disruption to fuel supply. This research identifies the importance of periodic structural integrity evaluation using an Ultrasonic Thickness Gauge GM 100 to measure the decrease in plate thickness due to corrosion and predict the remaining service life of the tank. The results of the calculation show that each course starting from course 1-5 is 109.4 years, 72.3 years, 56.9 years, 43.6 years, 38 years, this shows that the Daily Storage Tank PLTMG Seram Peaker 20 MW Masohi-Central Maluku can operate for the next 38 years. Keywords : Storage Tank, Remaining Life, Inspections, UTG, Corrosion Rate
PENGARUH PENGUJIAN KEKERASAN DAN PENGUJIAN TEKAN TERHADAP KARAKTERISTIK GAYA TUMBUKAN PADA CANGKANG KENARI (CANARIUM INDICUM L) Loppies, Leslie S.; Patty, Alexander A.; Pelasula, Berthy; Lekatompessy, Roy R.; Nanulaitta, Nevada Mario
Jurnal Rekayasa Mesin Vol. 15 No. 1 (2024)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/jrm.v15i1.1227

Abstract

Kenari (Canarium indicum L) belongs to the Burseraceae family and is one of the endemic fruits in Indonesia, especially Maluku. Walnuts have a tough shell that encloses the flesh, to get the flesh without damaging it careful effort is needed. This study investigated the strength of walnut shells through mechanical testing to determine the amount of impact force needed to break the walnut shell. The mechanical test carried out is a compression test and impact test. The values of these tests assist in determining, measuring, and analyzing the minimum and maximum force loads required to crack a walnut shell. Tests were carried out on walnut shells from 6 different villages on Ambon Island and Saparua Island. The impact test where the highest impact absorption energy value was found in walnut shells from Booi Village, namely 23.18 J/mm2, and the lowest in walnut shells from Morela Village, 22.40 J/mm2. In the compression test where the lowest value was found in walnut shells from Morela village with a value of 3.61 MPa while the highest value was found in walnut shells from Booi village, namely 5.24 MPa. Whereas the minimum compressive force is 16.22 kgf/mm2 and the maximum compressive force is 17.61 kgf/mm2.
ANALISA PENGARUH VARIASI KUAT ARUS PENGELASAN FLUX CORED ARC WELDING (FCAW) TERHADAP SIFAT KEKERASAN PADA DAERAH HAZ BAJA KARBON RENDAH Huka, Graciadiana. I.; Matheus, Josef; Nanulaitta, Nevada JM.; Pattikayhatu, Erwin Bravor
Journal Mechanical Engineering Vol. 2 No. 1 (2024): April
Publisher : Jurusan Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/jme.v2i1.2579

Abstract

Welding is a process of joining metals by utilizing electric power as a source of welding heat. Flux-Core Arc Welding (FCAW) is a welding process that uses a heat source from electricity that is converted into a heat source in an electric arc, in this FCAW welding the type of protection used is flux or powder that is in the core of the welding wire (the welding wire is rolled in a roll). This research aims to observe changes in hardness values after welding, both low carbon steel hardness in the HAZ (Heat Affected Zone) area and outside the HAZ (Heat Affected Zone) area. Welding using V-joints with angles of 45° and 60° and varying the voltage strength at 16 volts, 18 volts and 20 volts. Hardness testing using the Rockwell method where the highest hardness value of the HAZ area for 45 is 22.95 HRD at a voltage strength of 20 volts. For V-joints for an angle of 60°, the highest hardness value of the HAZ area is also at a voltage strength of 20 volts with a value of 24.10 HRD. The highest increase in hardness value is at the V-angle 60° joint with a voltage of 20 volts with a hardness value of 21 HRD while the lowest is the V-angle 45° joint with a voltage of 16 volts at 18.67 HRD. Keywords: Hardness Value, HAZ (Heat Affected Zone), FCAW (Flux Cored Arc Welding)
Co-Authors Agustinus O. Lopuhaa Annafiyah Annafiyah Basri Katjo Berthy Pelasula Berthy Pelasula Clara Sekeroney Cley Talkua Erwin B Pattikayhatu Erwin Bravor Pattikayhatu Erwin Patikayhattu F Demmatacco F. Demmatacco Faizatur Rohmah Frederick Dematacco Fredrick Demattacco Fredrik Demataco Graciadiana I Huka Graciadiana I Huka Graciadiana. I. Huka H. S. Latumaerissa Helen Riupassa Hendry de Fretes Hendry Y. Nanlohy Herman Tjolleng Taba Hermon Latumaerissa Hermon. Latumaerissa Huka, Graciadiana I Huka, Graciadiana. I. Ike Dayi Febriana Imam A Hanifah Josef Matheus Josef Matheus Josef Matheus Julian Salakory Kelian, Nur Aisyah Utami Laily Ulfiyah Lasamahu, Stevanno B D Latuconsina, Muhammad Jen Leatemia, Josua M. Leatemia, Meiti Lekatompessy, Roy R. Lilipaly, Eka Rahmat Mahayani Anthonio Putera Loppies, Leslie S. Loppies, Leslie. S. Lukman Hadiwijaya Malakauseya, J. J Marthina Mini Masaki Yamaguchi Matheus, J Meiti Leatemia Mohammad Anas Fikri Muhammad Jen Latuconsina Nanse H. Pattiasina Nur Aisyah Utami Kelian Patikayhattu, Erwin Pattikayhatu, Erwin Bravor Patty, Alexander A. Pelasula, Berthy Picanussa, Jovancko. S. S. R.R Lekatompessy R.R. Lekatompessy Ramadhan, Fahri Ratna Ayu Dewi Ratna Ayu Pawestri Kusuma Dewi Rey Joy Toding Padang Roy R Lekatompessy Rumaday , Gahsar Semuel M.J.S Tuny Steanly R.R. Pattiselanno