cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota padang,
Sumatera barat
INDONESIA
Jurnal Teknik Mesin
Published by Politeknik Negeri Padang
ISSN : 18298958     EISSN : 26555670     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering
Jurnal Teknik Mesin adalah sebuah jurnal peer review yang didedikasikan untuk publikasi hasil penelitian yang berkualitas dalam bidang teknik mesin.
Arjuna Subject : -
Articles 204 Documents
 12   13   14   15   16 
Pengaruh Variasi Temperatur Tempering Terhadap Struktur Mikro Dan Struktur Kristal Pada Baja Karbon Sebagai Bahan Mandrill Ikhrar Damai Tullah; Yulius Nanang; Budiarto Budiarto
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1102

Abstract

This writing begins with a mandrill that cannot be modified in a company, so the author wants to know the crystal structure and microstructure of the steel, as well as explain the composition contained in the steel being tested. Tests were carried out by observing the crystal structure using an X-Ray Diffractometer (XRD), observing the microstructure and material composition using Scanning Electron Microscopy – Energy Dispersive X-ray (SEM-EDX). The results show that the crystal structure and microstructure are strongly influenced by the quenching and tempering processes. The increase in crystal size occurred after the tempering process at 425° C from 34.33 nm to 52.31 nm. There was a decrease in dislocation density after tempering at 425° C from 0.00085 lines/mm2 to 0.00085 lines/mm2. Likewise, the micro strain after the tempering process at 425°C decreased from 0.25 (ε) to 0.19 (ε). The test material has several compositions such as iron (Fe), oxygen (O), manganese (Mn), sodium (Na), chromium (Cr), calcium (Ca) and carbon (C). Microstructure testing showed a decrease in iron Fe atoms after the tempering process from 65.79% to 42.96%, a decrease in atoms also occurred in manganese from 0.51% to 0.34% after the tempering process. There was an increase in oxygen atoms after the tempering process from 33.31% to 54.23%, an increase in the atomic presentation also occurred in sodium (Na) from 0.33% to 2.46% after the tempering process
Optimasi Pemanfaatan LPG Sebagai Bahan Bakar Genset Untuk Mendukung Program Penghematan Energi yovan witanto; Benny Dwika Leonanda
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1113

Abstract

The use of LPG as a generator fuel needs to be optimized. For this reason, the correct LPG gas flow rate needs to be studied so that it becomes economical. The purpose of this study is to analyze the effect of fuel flow rate variation and Choke Valve variation on the performance of a 4-stroke generator. Gas enters the carburetor with varying gas flow rates of 3 L/minute, 4 L/minute, 5 L/minute and 6 L/minute. Then the generator is set to run stably on fully open, half and closed Choke Valve variations. From these variations, a combination is then sought to produce the smallest LPG flow rate with optimum power. The generator can operate well at flow rates of 4 L/min and 5 L/min with the Choke Valve variation position fully open. This shows that the ratio of LPG and air reaches the ideal condition so that the combustion process is complete. Optimization of LPG consumption in the generator is set at a flow rate of 4 L/minute with the Choke Valve fully open. Thus the excessive use of LPG can be saved.
Pengaruh Perbedaan Ukuran Intake Kontraksi Terhadap Laju Aliran Di Ruang Uji Wempi Geovano Iribaram; Vina N Van Harling
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1132

Abstract

The contraction cone or intake is a very important part of wind tunnel design because it has a high impact on the quality of airflow in the test section. The design of the contraction cone aims to create the air pressure required at the time of entry of the test section without experiencing much turbulence. This research was conducted using an experimental method, where in this study it was carried out by testing, making 3 intake components or funnels of different sizes. The calculation results obtained funnel 1 contraction with a value of 11,466 m3 / s, funnel 2 contraction with a value of 12,266 m3 / s, and funnel 3 contraction with a value of 12,533 m3 / s. These results show that the size of the contraction affects the wind flow rate inside the test chamber. Where changes in the size of contractions will increase the wind flow rate, which is caused by the increasing size of the contraction cross-sectional area so that the shelter area or wind flow area that will move towards the test room increases in size or area
Turbin Crossflow untuk PLTMH di Sungai Karuah, Kelurahan Lambung Bukit, Kec Pauh, Padang Nota Effiandi; Yuliarman Yuliarman; Ichlas Nur
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1149

Abstract

Utilization of electrical energy has been applied in almost all fields of life. One of them is the use of electricity to repel plantation pests. In the hills of Batu Busuk, around the Padang Karuah River, Kel Lambung Bukit, Kec. Pauh, Padang is one of the communities that has implemented the application. The people who are gardening there have worked together in making a Micro Hydro Power Plant (PLTMH) type waterwheel with a power of 1 kW with the current condition has been damaged and can not be used anymore. Seeing the potential of water owned according to the results of the field survey with a flowrate of 100 L / s and a head of 5 m, the use of crossflow turbines is one type of turbine that is suitable for replacing a windmill that has been damaged with a power generated of 3.7 kW. The crossflow turbine has an outer diameter of runner (D1) 0.3 m, runner width (L) 0.2 m and the number of blades (z) 28 pieces. With the use of the crossflow turbine, the potential of water will be maximally utilized.
Pembuatan Cetakan Pellet Elektroda Super Kapasitor Untuk Penyimpan Energi yuli yetri; Eka Sunitra; Ali Siddik; Rakiman Rakiman; Haris Haris
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1150

Abstract

The design of a tool for printing supercapacitor electrodes has been completed. The basic material for the electrode is cocoa pod skin. The purpose of this research is to manufacture and assemble a laboratory-scale supercapacitor chip mold, which is used to facilitate the manufacture of the chip that functions as an electric current store. After the design process is complete, it is continued to manufacture supercapacitor chips using a press system. The actuator/pressurizer uses a hydraulic jack with a capacity of 50 tons, and a mold made of ST 37 and ST 60 steel. The mold is above the jack assisted by a steel frame as a pressure barrier. And a dial indicator as a marker to stop pressing by the jack. The process of making supercapacitor chip molds starts from cutting, drilling, turning, surface grinding, and welding. After the process of making components and assembling is complete, a trial of the tool is carried out to find out whether the tool works well. After a series of tests were carried out, it turned out that this pellet mold was able to print well without any cracks.
Optimalisasi Temperatur Sintering Pada Sintered Body Hidroksiapatit Dengan Penambahan Silika Sebagai Material Penguat Erdinal - Febri; Azisyam Pajri; Ade Indra
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1181

Abstract

Sintered body hydroxyapatite (HA) in the form of pellets has been made by adding silica as a reinforcing material (ratio 60:40 wt.%) by varying the sintering temperature. HA and silica were subjected to a dry mixing process for 2 h, then a wet mixing process was carried out for 2 h with the addition of PVA and alcohol as a binder. The mixing process uses a rotary drum with the addition of zirconia balls with the aim of making the mixture more homogeneous. After the mixing process, the samples were dried for 48 h to remove the alcohol contained. The green body was made using the uniaxial pressing method at a pressure of 100 MPa and held for 3 minutes. The sintering process is carried out variously at temperatures of 800°C, 900°C, 1000°C, 1100°C, 1200°C, 1300°C, and 1400°C. with a heating rate of 5ºC/minute and holding time of 4 h. Next, the temperature was lowered to 300ºC with a cooling rate of 5ºC/minute. The results showed that linear shrinkage increased significantly (weight shrinkage increased 12.83% - 25.08% and diameter shrinkage increased 3.26% - 23.21%). The results of the relative density calculation show that there is a significant increase with each variation in sintering temperature, where the increase occurs from 44.4% - 85.6%. The compressive strength value also shows an increase with increasing sintering temperature, namely from 21.2 MPa at 800 oC to 65.9 MPa at 1300 oC. Meanwhile, at a sintering temperature of 1400°C, compressive strength values decreased and oxidation occurred as evidenced by color changes. It can be concluded that the optimization of the sintering process occurs at a temperature of 1300 oC which is proven by the highest compressive strength value and no oxidation occurs.
Perancangan dan Analisis Daya Turbin Air Piko Hidro untuk Aliran Arus Rendah Nia Nuraeni Suryaman; Raden Herdian Bayu Ash Siddiq; Neris Peri Ardiansyah
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1185

Abstract

Over time, the consumption of electrical energy needed in Indonesia is getting bigger. Various efforts continue to be made either by seeking new energy potential or by developing existing technologies. Apart from the increasing need for electrical energy, efforts are made to supply the needs of electrical energy by utilizing the potential and conditions that exist in certain areas. Water energy has been widely utilized and used for power generation. The potential of water as an energy source can be used as a provider of electrical power. One of the uses of water energy is to make hydroelectric power plants. The purpose of this study is to design a portable water turbine design and find out the results of the calculation of the analysis of electrical power produced. The research method used is the analysis of water turbine design using the SolidWorks application to be able to find out the shape of the turbine that has simple, portable properties and can be carried anywhere. The size that meets the desired criteria is 10 cm for diameter and 4 cm for height. After designing the turbine design, then the calculation and analysis of the power released by the water turbine is carried out. The data needed to perform the calculation are water discharge 1.48×10-5 m3/s, head 6×10-2 m, water density 1000 kg/m3, gravity acceleration 9.81 m/s2, turbine efficiency 12.6%. Using the turbine power formula, the turbine power with a water discharge value of 1.48×10-5 m3/s is 11 Watts. Then the 2nd calculation was carried out with the value of the water discharge used of 9.6×10-5 m3/s and turbine efficiency of 24.9%. After calculation, the turbine power value of 14 Watts was obtained.
Pengaruh Penambahan Filler Al2O3 dan TiO2 pada Resin Polyester terhadap Sifat Fisik dan Mekanik Ahmad Hasnul Fajri; Ilhamdi Ilhamdi; Ismet Hari Mulyadi; Jon Affi
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1187

Abstract

Polyester composites have been developed to have high strength and light density, but the fracture occurs due to very little plastic deformation or low strain values, pre-failure detection is difficult in these composites due to the rapid propagation of cracks in the composite system. To increase the strength and delay failure, the addition of filler in the form of Al2O3 and TiO2 particles is carried out. The use of particles as fillers in polymer composite materials is increasingly being developed. In this study, Al2O3 and TiO2 particles (0%, 2%, 4%, 6%, 8%, 10% vol.) were added in polyester matrix BQIN EX 157. by casting method; the liquid homogeneous mixture was carefully poured into a simple mould to be air dried. The composites were cut to serve as specimens for density test, mechanical tests such as tensile and compressive tests. The results showed a density of 1.23 g/cm3, a maximum strength of 47 MPa for 2% additional Al2O3 filler, (tensile, decreasing ̴11%) and 120 MPa (compressive) for a maximum of 2% additional Al2O3 (compressive, decreasing ̴3%) with TiO2 filler. The decrease in strength was caused by uneven particle dispersion, voids and agglomeration that occurred during the casting process.
Pengaruh Sputtering TiN Terhadap Kekerasan Permukaan dan Struktur Mikro Pada Material Stainless Steel 316L Jemssy Ronald Rohi; Elkana Bilak Lopo; Boy Bistolen
Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.17.1.1196

Abstract

Metal-based biomaterials are highly rust-resistant. A key property that metal-based biomaterials must possess is excellent biocompatibility with living cells. AISI 316L is widely used for implantation purposes in orthopedic surgery due to its good mechanical properties and low price, but AISI 316L lacks good biocompability with the body so that implant materials with AISI 316L material cannot be used for a long period of time. This research aims to study the effect of TiN sputtering process on AISI 316L stainless steel material and titanium target material as a coating on the surface. The sputtering process was carried out on the 316L surface a variation of sputtering time of 60, 90, 120 and 150 minutes with a gas variation ratio of 20% N2 and 30% N2, using a voltage of 5 kV and the current used was 5-10 mA at a pressure of 0.079 mbar. The results of hardness testing on 316L material with TiN sputtering treatment can increase the hardness on the surface of the material. The surface hardness value of the effect 30% N2 gas ratio and sputtering duration of 90, 120 and 150 minutes respectively is 305 kgf/mm­2, 310 kgf/mm2 and 334 kgf/mm2, this treatment has significant increase in hardness at 90, 120, and 150 minutes. Microstructure testing to measure the thickness of the electroplating layer results, showing that the thickness of the layer resulting from the sputtering process with a gas ratio of 30% N2 and a TiN sputtering duration of 120 minutes shows there are vacancies on the surface inserted by hard TiN atoms.
Isoterm Adsorpsi Arang Kulit Jengkol Sebagai Adsorben CO2 Muhammad Fadhil Rahman; Adjar Pratoto; Dendi Adi Saputra; Akio Kodama
Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin
Publisher : Politeknik Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30630/jtm.16.2.1206

Abstract

The concentration of carbon dioxide (CO2) gas in the atmosphere continues to increase every year, mainly due to human activities such as burning fossil fuels for energy, industrial processes, and transportation. The development of CO2 gas reduction research continues to be carried out, one of which is the adsorption process using adsorbents. The research was carried out by looking at the effect of variations in activating agent and activation temperature on adsorbents as CO2 adsorbers and how N2 and pore size distribution influence CO2 adsorption. The active carbon adsorbent used comes from jengkol peel which is carbonized via the pyrolysis method. Adsorbents are made by varying the type of activating material (KOH, Urea, and KOH+urea) and activation temperature (600℃, 700℃, and 800℃). The active ingredient KOH+urea has better absorption capacity than other variations, but not too high. N2 gas does not really affect the CO2 adsorption process because it has a low N2 adsorption isotherm, so it is not worrying if the CO2 adsorption process also contains N2 in the air. Based on measurements with Belsorp-Max II, the data obtained is only specific surface area data, this is due to the small surface pores of the adsorbent. The temperature of 800℃ has a better specific surface area than other variations, this is also by the higher CO2 adsorption capacity. So it is concluded that the pore surface area influences the ability to absorb CO2. Based on the data obtained, jengkol peel charcoal is not suitable as a CO2 adsorbent because it has a low pore surface area and adsorption isotherm

Page 14 of 21 | Total Record : 204

 12   13   14   15   16 

Filter by Year

2004 2025


Reset
Filter By Issues
All Issue Vol 18 No 1 (2025): Jurnal Teknik Mesin Vol 17 No 2 (2024): Jurnal Teknik Mesin Vol 17 No 1 (2024): Jurnal Teknik Mesin Vol 16 No 2 (2023): Jurnal Teknik Mesin Vol 16 No 1 (2023): Jurnal Teknik Mesin Vol 15 No 2 (2022): Jurnal Teknik Mesin Vol 15 No 1 (2022): Jurnal Teknik Mesin Vol 14 No 2 (2021): Jurnal Teknik Mesin Vol 14 No 1 (2021): Jurnal Teknik Mesin Vol 13 No 2 (2020): Jurnal Teknik Mesin Vol 13 No 1 (2020): Jurnal Teknik Mesin Vol 12 No 2 (2019): Jurnal Teknik Mesin Vol 12 No 1 (2019): Jurnal Teknik Mesin Vol 11 No 2 (2018): Jurnal Teknik Mesin Vol 11 No 1 (2018): Jurnal Teknik Mesin Vol 10 No 2 (2017): Jurnal Teknik Mesin Vol 9 No 1 (2012): Jurnal Teknik Mesin Vol 1 No 2 (2004): Jurnal Teknik Mesin Vol 1 No 1 (2004): Jurnal Teknik Mesin More Issue