Garuda - Garba Rujukan Digital

p-Index From 2019 - 2024

0.947

P-Index

This Author published in this journals

All Journal Buletin Udayana Mengabdi Jurnal Energi Dan Manufaktur Dinamika Teknik Mesin International Journal of Engineering and Emerging Technology

I Made Astika

Jurusan Teknik Mesin Universitas Udayana, Kampus Bukit Jimbaran Bali

Author-ID : 2459575

Aerospace Engineering Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Mechanical Engineering Physics

Published : 10 Documents Claim Missing Document

Claim Missing Document

Articles

Title

Efek Tegangan Listrik dan Waktu Proses Elektroplating Krom Keras terhadap Tebal Lapisan Ketut Suarsana; I M. Astika; D.N.K Putra Negara
Jurnal Energi Dan Manufaktur Vol 12 No 2 (2019)
Publisher : Department of Mechanical Engineering, University of Udayana

Proses pelapisan krom keras merupakan proses akhir atau tahap penyelesaian pada kebanyakan pembuatan komponen agar tidak cepat aus, seperti pada poros, pasak, ring piston, silinder, bearing dan crank shaf. Dalam bidang industri sifat mekanik yang banyak diperlukan pada logam yang dipergunakan adalah kemampuannya untuk tahan aus dan tahan korosi yang mana kita ketahui logam mempunyai reaksi yang sangat aktif terhadap perubahaan temperatur dan cuaca, maka perlu dilakukan pelapisan sehingga kemungkinan suatu bahan logam terkena korosi bisa dihambat. Bahan spesimen yang di gunakan adalah Baja St 60 (C 0.40%; Mn 7%; Si 0.28%; P+S 0.09%; Fe 98,53%) dengan variasi tegangan listrik: 4, 6, dan 8 volt, untuk variasi waktu elektroplating krom keras 30, 45, dan 60 menit. Pengujian yang dilakukan dengan pengukuran ketebalan lapisan menggunakan skala foto mikro dan menghitung ketebalan lapisan permukaan. Hasil penelitian menunjukkan bahwa semakin tinggi tegangan listrik yang digunakan dan semakin lama waktu proses pelapisan krom keras maka meningkat ketebalan lapisannya. Ketebalan lapisan permukaan yang paling tebal didapatkan pada tegangan 8 volt dengan waktu pelapisan 60 menit dengan ketebalan lapisannya sebesar 89,37 ?m, sedangkan ketebalan lapisan permukaan tipis didapat pada tegangan 4 volt dengan waktu pelapisan 30 menit ketebalan lapisannya sebesar 20,18 ?m. Jadi tegangan listrik dan waktu electroplating dapat mempengaruhi dan memberikan efek terhadap ketebalan lapisan yang terjadi pada Baja St.60. The hard chrome coating process is the final process or completion stage in most parts making so as not to wear out quickly, such as on the shaft, pegs, piston rings, cylinders, bearings and crank shafts. In the industrial field of mechanical properties that are much needed in the metal used is its ability to withstand wear and corrosion resistance which we know metals have a very active reaction to changes in temperature and weather, coating is necessary so that the possibility of a metal being corroded can be inhibited. The specimens used were Baja St 60 (C 0.40%; Mn 7%; Si 0.28%; P + S 0.09%; Fe 98.53%) with variations in electrical voltage: 4, 6 and 8 volts, for time variations hard chrome electroplating 30, 60 and 90 minutes. Tests carried out by measuring the thickness of the layer use a micro photo scale and calculate the thickness of the surface layer. The results showed that the higher the voltage used and the longer the coating process was hard chrome, the thickness of the layer increased. The thickest surface layer thickness was obtained at 8 volts with a coating time of 60 minutes with a layer thickness of 89.37 ?m, while the thickness of the thin surface layer was obtained at a voltage of 4 volts with a coating time of 30 minutes layer thickness of 20.18 ?m. So the electrical voltage and time of electroplating can affect and give effect to the thickness of the coating that occurs in Steel St.60

Efek perlakuan pack carburizing dan media korosif pada baja AISI 1045 terhadap laju korosi I Ketut Suarsana; I Made Astika; I Gede Putu Agus Suryawan
Jurnal Energi Dan Manufaktur Vol 14 No 2 (2021)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEM.2021.v14.i02.p01

Corrosion is a destructive symptom that affects the properties of a metal, which means that the physical properties and quality of the metal decrease due to the electrochemical reaction between the metal and its environment so that the strength of the metal decreases. Corrosion control can be used to avoid the negative impact of corrosion, through the pack carburizing treatment method. The material used in this research is AISI 1045 steel. To determine the effect of pack carburizing on the corrosion rate of steel, the research was carried out by varying the suhue of the carburizing pack and corrosive media. In this study, the pack carburizing process with suhue variations used was 750°C, 850°C, 950°C and the corroding media used were air, fresh water and sea water. This was observed in accordance with the application of AISI 1045 material. The corrosive process through corrosive media was carried out for 720 hours. The results showed that pack carburized steel at a temperature of 950°C had a lower corrosion rate than pack carburized steel at 750°C. Also, air corrosive media provides a lower corrosion rate compared to seawater corrosion rate.

Uji Kekuatan Bending Pipa Komposit Jute-Epoxy pada Perlakuan Rendaman Air Panas I Wayan Purna Wirama; I Made Astika; I.D.G Ary Subagia
Jurnal Energi Dan Manufaktur Vol 14 No 2 (2021)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEM.2021.v14.i02.p07

The main purpose of this study was to determine the comparison of the bending strength of composite pipes when treated with hot water. In this study, composite pipes were made using woven sacks and tied with an epoxy matrix which was molded using the VARTM (Vacuum Assisted Resin Transfer Molding) method. Jute fiber laminated composite on epoxy binder is made by laminated 3 layers with fiber direction 450 and has a thickness of 2.55 mm, the jute-epoxy composite pipe will be treated with heat treatment. Then tested on bending loading. The results of this study were the bending stress and strain on the control specimen compared to the heat treated specimen, an increase in the strain of the heat treatment specimen was 0.007 [MPa], this was due to the heat treatment temperature on the specimen which caused a change in the properties of the specimen itself, which was initially a brittle specimen changes to plastic. Meanwhile, the value of bending stress and modulus of elasticity on control specimens and heat treatment specimens. The obtained stress on the control composite pipe is 67.946 [MPa] with a modulus of elasticity of 10.398 [GPa]. While the heat-treated composite pipe has a bending stress of 28.613 [MPa] with an elastic modulus of 2.225 [GPa].

Perbandingan kekuatan kompresi struktur laminasi dan prepreg dari komposit jute-epoxy Gede Adi Yoga Saputra; I Made Astika; I.D.G Ary Subagia
Jurnal Energi Dan Manufaktur Vol 14 No 1 (2021)
Publisher : Department of Mechanical Engineering, University of Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JEM.2021.v14.i01.p05

This experiment has conducted to investigate mechanical properties of pipe structure performed by natural composite. The composite has been fabricated in two modes such laminate and prepreg reinforcement by vacuum injection molding. Compression test have been conducted for each variety in five times repeating. The specimen was made and test according to the ASTM D2166M-16 standard. The purpose of this research is to investigate and comparation of compression strength of laminate and prepreg structure composite pipe. The test result shows that laminates mode of pipe composite using the woven jute fabric has a lower in compression strength about 711.34 [MPa] compared to prepreg mode about 1184.9 [MPa]. In addition, the young modulus of the laminate composites has about 5.37 [GPa], and the prepreg mode has value about 6. 885 [GPa]. This value indicates that the prepreg mode more strength than the laminates mode in composite pipe due to the prepreg in tangential direction the compression energy absorbed by the fiber absolutely.

Pengaruh Perlakuan Temperatur dan Waktu Penahanan Pack Carburizing Terhadap Umur Lelah Baja St 42 Ketut Suarsana; Cok Istri Putri K; I Made Astika
Jurnal Energi Dan Manufaktur Vol 11 No 1 (2018): Published in April 2018
Publisher : Department of Mechanical Engineering, University of Udayana

Pack carburizing merupakan suatu proses laku panas untuk memperoleh pengerasan hanya pada bagian permukaan dengan menggunakan media carburizer padat. Dengan memberikan temperatur pemanasan dan waktu penahanan yang tepat diharapkan dapat meningkatkan umur lelah suatu material baja St.42. Metode pada penelitian ini mengunakan pack carburizing padat berupa serbuk, yang dibuat dalam bentuk kotak dan didalamnya diisi serbuk carbon. Penelitian ini membahas tentang pengaruh waktu penahanan dan temperatur pack carburizing terhadap umur lelah baja ST 42 dengan menggunakan variasi temperatur pemanasan adalah : 850, 900 dan 950°C dan waktu penahanan 4, 6 dan 8 jam. Kedua variabel ini diamati pengaruhnya terhadap umur lelah. Berdasarkan hasil penelitian bahwa waktu penahanan dan temperatur pack carburizing berpengaruh nyata terhadap umur lelah, dimana umur lelah tertinggi yaitu pada 993.089 cycle pada temperatur pemanasan 950 °C dan waktu penahanan 8 jam. Umur lelah paling rendah adalah 440.613 cycle terjadi pada temperatur pemanasan 850 °C dan waktu penahanan 4 jam. Pack carburizing is a hot-selling process to obtain only hardening on the surface by using solid carburizer media. Providing proper heating temperature and retention time is expected to increase the fatigue life of a steel material of St.42. The method in this study using a solid pack carburizing of powder, which is made in the form of a box and inside it is filled with carbon powder. This study discusses the effect of detention time and pack carburizing temperature on ST 42 fat age by using variation of heating temperature are: 850, 900 and 950?C and holding time 4, 6 and 8 hours. Both of these variables were observed to influence the fatigue life. Based on the result of research that the holding time and temperature of pack carburizing have a significant effect on fatigue life, where the highest fatigue age is 993,089 cycles at heating temperature 950 ?C and 8 hours of detention time. The lowest fatigue period was 440,613 cycles occurring at a heating temperature of 850 ?C and a 4 hour detention time.

Co-Authors Cok Istri Putri K Dewa Ngakan Ketut Putra Negara Gede Adi Yoga Saputra Hanung Adi Nugroho I .G. P. Agus Suryawan I Dewa Gede Ary Subagia I Gusti Ketut Sukadana I Gusti Komang Dwijana I Ketut Suarsana I Nyoman Suprapta Winaya I Wayan Purna Wirama I.K.G. Wirawan Made Suarda Putu Lokantara

Title Search

Found 5 Documents Search Journal : Jurnal Energi Dan Manufaktur

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 5 Documents
Search
Journal : Jurnal Energi Dan Manufaktur