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Published by Universitas Merdeka Malang
ISSN : 02163233     EISSN : 25802283     DOI : -
Core Subject : Engineering,
Automotive Engineering Control & Systems Engineering
Jurnal TRANSMISI dipublikasikan oleh Jurusan Teknik Mesin Universitas Merdeka Malang sebagai media diseminasi hasil penelitian dan karya ilmiah baik penelitian dasar maupun terapan di bidang teknik mesin. Berkala ilmiah ini memuat naskah dengan bidang kompetensi konversi energi, material (metalurgi), produksi dan manufaktur baik merupakan penelitian dasar ataupun rekayasa alat terapan.
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol 18, No 1 (2022): March 2022" : 7 Documents clear
Analisis Sifat Mekanik dan Sifat Fisik Paduan Aluminium pada Perlakuan Penuaan Buatan Dewi Izzatus Tsamroh; Muhammad Ilman Nur Sasongko; Cepi Yazirin
TRANSMISI Vol 18, No 1 (2022): March 2022
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i1.8056

Abstract

The most widely used aluminum alloy in industry is Al2024 alloy. Aluminum alloys used for automotive components are required to have good strength. The purpose of this study was to analyze the distribution of precipitates, morphology and hardness of Al2024 alloy due to artificial aging in stages I, II, and III. The test results showed that the highest distribution of precipitates (CuAl2) was in Al2024 with the third-stage artificial aging variation, and the least distribution was in the I-stage artificial aging variation. The results of morphological observations on Al2024 due to multilevel artificial aging treatment using SEM, the microstructure of Al2024 was relatively the same. (homogeneous) at each level variation. The stratified artificial aging treatment on Al2024 causes the particle size at each level variation to be smaller with closer distances. Meanwhile, the hardness value of Al2024 increased. The highest hardness of Al2024 is in the specimen with the third stage of artificial aging treatment, which is 79.66 HRE, the lowest hardness is the first stage of artificial aging, which is 74.33 HRE. 
Analisis Kegagalan Cylinder Head Studs pada Mesin Diesel Empat Langkah dengan Metode Elemen Hingga Pradhana Kurniawan; Yusuf Adi Sudrajat
TRANSMISI Vol 18, No 1 (2022): March 2022
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i1.8118

Abstract

Stud bolts are widely used in mechanical engineering to join two or more components. Sometimes these components fail due to fatigue, and cracks. Fatigue damage is caused by fluctuations between stress and strain that can change the permanent structure of the material, and can cause cracks or fractures after fluctuating several times. The occurrence of fatigue fractures is caused by the simultaneous action of cyclic stresses, tensile stresses, and plastic strains. Each cylinder head has 6 studs. Four cylinders stud heads were damaged on the top side, adjacent to the start of the second root thread, on the top side of the stud. Stud damage occurs over and over again, even on new cylinder head studs. By analyzing the causes of stud damage, simulations can be carried out with the aim of determining the maximum stress and fatigue life of the cylinder head studs. 
Karakteristik Nanopowder Manganese Oxide (MnO) Hasil Sintesis Sol-Gel Sasongko, Muhammad Ilman Nur
TRANSMISI Vol 18, No 1 (2022): March 2022
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i1.8122

Abstract

Phase and morphology characterization of powder Manganese Oxide (MnO) aims to reduce the grain size of micro sized MnO material into nano size using sol-gel method with sintering time variations. The results showed the phase changes in the MnO 30 minutes, 60 minutes and 90 minutes indicates the size of the crystal grains of 47,3.nm, 68.299 nm, and 84, 547 nm. (2) The change is significant, because the crystals MnO Raw at 143.44 nm. (3) Changes in the morphology shows a triangular Raw MnO after synthesis, transformed into spherical grains by agglomeration membranes MnO. The study has managed to change the grain size of micro sized MnO into nano.
Optimasi Parameter Keausan Paduan Aluminium 2024 pada Perlakuan Panas Natural Aging Prasetya, Yanto Budi
TRANSMISI Vol 18, No 1 (2022): March 2022
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i1.7552

Abstract

Aluminium merupakan salah satu paduan logam yang kerap digunakan pada segala bidang, hal ini dikarenakan aluminium merupakan paduan yang banyak memiliki sifat yang tahan korosi tinggi, memiliki keuletan tinggi, ringan, dan relatif murah. Akan tetapi, aluminium cenderung memiliki laju keausan yang tinggi dibandingkan dengan paduan logam lain. Mengingat kegunaannya yang luas, maka perlu dilakukan perbaikan sifat dengan menggunakan perlakuan aging. Salah satu perlakuan aging adalah natural aging, yaitu penuaan logam pada suhu ruang. Penelitian ini bertujuan untuk mengetahui apakah terdapat peningkatan ketahanan keausan pada aluminium 2024 dengan perlakuan natural aging. Penelitian ini merupakan penelitian eksperimental pada skala laboratorium, spesimen dipanaskan melalui proses solution heat treatment pada suhu 520°C selama 30 menit, kemudian didinginkan cepat dengan menggunakan beberapa jenis media pendingin dan variasi waktu penahanan natural aging. Hasil penelitian menunjukkan bahwa terdapat peningkatan ketahanan aus pada aluminium 2024.
Analisis Pengaruh Variasi Sudu terhadap Kinerja Kincir Angin Poros Horizontal Noor, Muhammad Fathuddin; Dewi, Indah Noor Dwi Kusuma; Muhammad, Alief
TRANSMISI Vol 18, No 1 (2022): March 2022
Publisher : Universitas Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i1.7931

Abstract

Indonesia is one of the countries with abundant natural resources that have the potential to become renewable energy at this time, the development of renewable energy is the focus of research because Indonesia is in the middle of the equator which makes more air movement, dependence on fossil fuels can be solved by using wind-powered energy. This study aimed to determine the performance of a horizontal axis windmill with a diameter of 30 cm with variations of 3 blades and 4 blades at a height of 22 meters from the ground. The results of the horizontal axis windmill research that has been carried out in this study can be seen that the wind speed at the 3 blade variation produces the lowest wind speed of 2.0 m/s with a blade rotation of 14.9 rpm and a generator output of 1.12 volts. The highest wind speed is 3.7 m/s with a blade rotation of 28.9 rpm and a generator output of 3.84 volts, while in variation 4 the lowest wind speed is 2.8 m/s with a blade rotation of 29.2 rpm and the generator output is 2.5 volts, while the highest wind speed is 4.3 m/s with a blade rotation of 42.2 rpm and the generator output is 4.9 volts.
Analisis Deformation, Stress, dan Safety Factor pada Geometric Properties Crane Hook Johan Wayan Dika; Abi Suwito; Sunardi Sunardi; Titik Sugiarti
TRANSMISI Vol 18, No 1 (2022): March 2022
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i1.7972

Abstract

Crane hook strength analysis is an effort to minimize accidents and work failures when used in moving goods that tend to have heavy loads. Apart from that, the analysis is also used as a benchmark for the crane hook safety level which can be identified through the accompanying structures. This study aims to determine the strength of the crane hook with various geometric shapes and sizes, namely the ST E 355 crane hook with the DIN 15401 standard, hereinafter referred to as the original size and half of the original size. The strength in question consists of deformation, stress and safety factor. This research begins with the design process using an autodesk inventor, then proceeds to the simulation and analysis process through ANSYS. The results obtained are the crane hook with the original size has the best strength. This is indicated by a small deformation with a value of 0.82214 mm, a low stress value of 264.14 Mpa, and a high safety factor with a value of 2.668903.
Efek Parameter Feeding dan Kondisi Geometri Cutter terhadap Kekasaran Permukaan Baja ST 60 pada Proses Milling Vertikal Marianus Beatriks Djala Gili; Darto Darto; Surjedi Surjedi; Agus Iswantoko
TRANSMISI Vol 18, No 1 (2022): March 2022
Publisher : University of Merdeka Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26905/jtmt.v18i1.7561

Abstract

The milling process is one type of conventional machining process that is often carried out. The surface quality of the workpiece produced in the milling process is influenced by several factors, including the speed of feeding and the condition of the cutter. The aim of this study was to determine the effect of variable feeding and cutter conditions on the surface roughness of steel in conventional milling processes. The research was conducted using an experimental method. The research object is ST 60 steel which is processed on a micron milling machine WF3 SA. The research data shows that the feeding speed affects the surface roughness quality, where the greater the feeding value, the greater the Ra value. In addition, the condition of the cutter also has an effect, where slashing using a new cutter produces a Ra value which tends to be lower than slashing using a sharpened cutter. The lowest Ra value is 0.45 m occurs at 10 mm/minute feeding using a new cutter. While the highest Ra value at 40mm/minute feeding is 1.54 m using a sharpening cutter. 

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