cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Arif Basuki
Contact Email
arifbasuki@material.itb.ac.id
Phone
+6281222987695
Journal Mail Official
metalurgimaterial.id@gmail.com
Editorial Address
-
Location
Kota bandung,
Jawa barat
INDONESIA
Jurnal Metalurgi dan Material Indonesia
Published by Badan Kerjasama Pendidikan Metalurgi dan Material
ISSN : 26544962     EISSN : -     DOI : -
Core Subject : Science, Engineering,
Automotive Engineering Chemistry Engineering Industrial & Manufacturing Engineering
Jurnal Metalurgi dan Material Indonesia (JMMI) merupakan terbitan berkala makalah ilmiah mencakup keilmuan teknik metalurgi (metallurgy) dan teknik material (materials science and engineering). JMMI diterbitkan oleh Badan Kerja Sama Pendidikan Metalurgi dan Material Indonesia (BKPMM) per catur wulan yaitu pada bulan akhir April, Agustus, dan Desember.
Arjuna Subject : Energi (semua kategori) - Energi (Lain-Lain)
Articles 7 Documents
 1 
Search results for , issue "Vol. 2 No. 3 (2019): Desember" : 7 Documents clear
Aplikasi lost wax casting pada pembuatan screw ortopedi : Application of lost wax casting for manufacturing of orthopedic screw Moh Nor Ali Aziz; Rusnaldy; Paryanto; Patrick Munyensanga
Jurnal Metalurgi dan Material Indonesia Vol. 2 No. 3 (2019): Desember
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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

Abstract

Orthopedic screws are generally manufactured using CNC machines, but these machines are complex and expensive. Orthopedic screws are included in the special product category from its non-corrosive, not easily distorted and have better accuracy than other screws in general; so, it presents a high selling price. To overcome this challenge; the manufacturing process needs to be analyzed. The lost wax casting process gives production process of screw with accepted measures. This paper discusses the results of the dimensional analysis of casting where the process of casting lost wax begins with making the wax pattern mould. Furthermore, the designed assembly tree is smeared and poured in the ceramic pulp until it hardens. The heating process is useful to dilute the wax pattern before the pouring is successful. The main catalyst for good orthopedic screws is magnesium. The pouring process is needed specifically on this material which is easily oxidized or easily increased if the pouring process is in the open room. To avoid this, the material considered to be used is lead and this process is preferred to develop lost wax casting for manufacturing screws that produce small dimension products with high accuracy.
Analisa Kegagalan Bantalan Bola di Pompa Pelumas Turbin Gas Chevira Destri Pramesthi; Arie Wibowo; Husaini Ardy
Jurnal Metalurgi dan Material Indonesia Vol. 2 No. 3 (2019): Desember
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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

Abstract

Bantalan bola pompa pelumas sebuah turbin gas mengalami kegagalan pada awal operasi. Bola bantalan tidak bisa berputar, terdapat indikasi pemanasan berlebihan pada ring dalam dan luar. Penyebab kegagalan bantalan dianalisa dengan pemeriksaan visual, analisis komposisi kimia, analisis struktur mikro, dan uji keras. Efek pemanasan berlebihan ditunjukkan oleh warna permukaan yang lebih gelap pada ring luar dan dalam akibat gesekan dengan bola. Komponen ring luar dan bola terbuat dari material yang sama yaitu JIS G4805 Grade SUJ1, setara dengan ASTM A485 Grade 1. Struktur mikro ring luar dan bola dari bagian tidak rusak relatif sama, yaitu martensit temper dan partikel karbida. Struktur mikro martensit temper dan partikel karbida pada ring luar dan bola yang mengalami kerusakan parah berubah menjadi bongkahan karbida pada lokasi kontak. Kekerasan komponen bantalan yang tidak rusak diuji untuk menjadi acuan nilai kekerasan awal material. Kekerasan awal bola adalah 435 VHN, ring dalam adalah 249 VHN, dan ring luar adalah 742 VHN. Kekerasan ring dalam jauh lebih rendah dari ring luar akibat pemanasan berulang menggunakan welding torch pada waktu pemasangan dan pelepasan bantalan ke dan dari poros. Temperatur pemanasan diduga mencapai temperatur 650. Kekerasan ring luar yang mengalami kerusakan parah adalah 756 VHN, dan bola yang rusak parah adalah 480 VHN. Kekerasan yang meningkat adalah akibat terbentuknya gumpalan karbida karena ada karbon dari sisa grease yang berdifusi ke dalam ring luar ketika terjadi gesekan antara bola dan ring luar. Penyebab utama kerusakan bantalan bola tersebut adalah keteledoran operator yang tidak menambah grease setelah pemanasan ketika memasang poros ke bantalan. Pemanasan tersebut akan menguapkan grease dan menghilangkan efek lubrikasinya, sehingga bola tidak bisa berputar, dan akhirnya terjadi gesekan relatif antara bola dengan ring dalam dan ring luar. Penyebab ini didukung oleh data temperatur stabilitas grease (sekitar 110), yang mendekati temperatur maksimum pemanasan yang diijinkan oleh pabrik pompa, yaitu 93.
Analisa Kegagalan Tubing Hidraulik untuk Instrumen Nadya Laurenza; Arie Wibowo; Husaini Ardy
Jurnal Metalurgi dan Material Indonesia Vol. 2 No. 3 (2019): Desember
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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

Abstract

Hydraulics tubing austenitic stainless steel 316L for offshore instrument was failed due to pitting corrosions attack. This research aims to determine the root causes of tube leakage by visual examination of new and failed tube, scanning electron microscope (SEM) examination, deposits analysis by energy dispersive spectroscope (EDS), and microstructural analysis by light microscope. The examination results show that pitting corrosions were originated from surface defects as residences for deposit and marine growth. Pitting corrosions form a tunneling underneath the surface which one of the characteristic of sulpfhur reduced bacteria (SRB) corrosion. This conclusion is also supported by high sulphur concentration in surface deposit as a results of bacteria metabolisms and formation of FeS compound. Crevice corrosion also contributed to pitting formation because critical crevice temperature of 316L tubing material is around 10oC, lower than the service environment temperature. These two corrosion modes may occur separately or combined. Surface defects might be originated from improper handling, storage, or during construction, which induce scratches on tubing surface. To prevent pitting corrosion reoccurence, it is recommended to use fire retardant polyurethane thermoplastic rubber sheathing stainless steel 316L tube or superduplex stainless steel tube material which critical crevice temperature is 35˚C.
Komposit Grafit-Polistirena Diperkuat Poliuretan sebagai Penyerap Gelombang Akustik : Fabrication of Polyurethane Composite Foam with Graphite-Polystyrene Filler for Improved Sound Absorption Adhi Satriyatama; Haris Amaldi; M. Maulana Ibrahim; Aditianto Ramelan
Jurnal Metalurgi dan Material Indonesia Vol. 2 No. 3 (2019): Desember
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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

Abstract

Noise, harshness, and vibration (NHV) are problems encountered when driving a vehicle. This can cause serious problems for drivers if exposed to NHV for a long time. In order to avoid the NHV, vehicle are equipped with acoustic tile which functions to absorb vibration from the sound wave and reduce the noise caused by the vehicle’s engine. Polyurethane foam is commonly used as a sound absorption material because of its high sound absorption efficiency. The study aimed at investigating polystyrene (PS) and graphite (G) fillers with polyurethane matrix for improving acoustic property. The research started with optimization of composite that characterized using sound absorption intensity parameters at frequencies of 50 Hz-6000 Hz, and the optimum results obtained at matrix/filler 92.8%wt. The composite morphology is analyzed using SEM-EDX, optical microscopy, and the density. Mechanical test is conducted using Universal Testing Machine (UTM) and achieved the optimum compressive strength at 60G/40PS with 0.65 MPa. The absorption of acoustic waves property was tested in the frequency range 50 Hz-6300 Hz using an impedance tube and obtained the optimum composition at 0G/100PS.
Analisis Parameter Proses Atomisasi Sentrifugal Tipe Elektroda Berputar dan Karakterisasi Serbuk Hasil Atomisasi pada Material Baja Paduan: Parameters Analysis of Centrifugal Atomizing Process of Rotating Electrodes Type for Alloy Steel Materials and Characterization of Atomized Powder Thomas Albatros; Dr. Ir. Slameto Wiryolukito
Jurnal Metalurgi dan Material Indonesia Vol. 2 No. 3 (2019): Desember
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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

Abstract

Small components that have complicated geometry and precise dimensions are suitable to be produced by using powder metallurgy method. In Indonesia, powder metallurgy is not well developed, one of the causes is dependence on imported powders. This study discusses the effect of various parameters of making metal powders using centrifugal atomization machines on the character of the powders produced. The research includes the improvement of atomization tools, powder making, milling process, followed by the characterization process to determine the powder morphology, powder size distribution, and compounds formed from the resulting powder. The process parameters tested in this study are the type of raw material, the anode's rotational speed, and the amount of electric current applied. The raw materials used are reinforced steel, AISI 202, and AISI 304. With variations in rotational speed 4000rpm, 6000rpm and 8000rpm. The increase in rotational speed will reduce the size of the powder, and increasingly make the powder shaped like a ball. The milling process effectively reduces the size of alloy steel with a reduction of up to 89% in the form of angular powder. The XRD results show that the reinforced steel powder produced by atomization produces Fe2O3 and FeO powder, while AISI 202 and AISI 304 produce Cr2MnO4 compounds.
Karakterisasi Kekuatan Lelah Siklus Rendah Besi Cor Kelabu: Characterization of Low Cycle Fatigue Strength of Gray Cast Iron Agus Suprihanto; Dwi Basuki Wibowo; Djoeli Satrijo
Jurnal Metalurgi dan Material Indonesia Vol. 2 No. 3 (2019): Desember
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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

Abstract

Low cycle fatigue testing has been carried out on gray cast iron. 60 specimens made of three FC200 gray cast iron alloys with Cr (0.23%, 0.32% & 0.47% wt) and Cu (0.6% -0.7%) were tested using a servo pulse machine. Specimen dimensions refer to ASTM E739 standard. Low cycle fatigue testing used strain amplitudes between 0.15 to 0.5%. The fatigue behavior is characterized using Downing and Fash method. The analysis shows that the coefficient of fatigue strength (A) is between 2.336 –2.896 and the exponent of fatigue strength is between -0.251 to –0.266.
Studi Pengaruh Temperatur terhadap Laju Erosi-Korosi Baja API 5CT L80 dan API 5L X60 pada Lingkungan CO2 dan Asam Asetat Bambang Widyanto; Anthonius Valentino; Abdullatief Zuhdy
Jurnal Metalurgi dan Material Indonesia Vol. 2 No. 3 (2019): Desember
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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

Abstract

In this study, test was conducted to determine the effect of temperature with CO2 and acetic acid environment on the corrosion rate of API 5CT L80 and API 5L X60 steel pipe. Corrosion immersion test was held using modified pressurized autoclave which allow movement in testing fluid to simulate erosion condition. Each test conducted for 168 hours with 2 bar of pressurized CO2 in the system, testing fluid with 3360 ppm acetic acid concentration and four variation of temperature which are 40˚C, 60 ˚C, 80 ˚C and 95 ˚C. Immersion test on API 5L X60 steel specimen as regard to increase of temperature will also increase the value of corrosion rate, mean test on API 5CT L80 steel sample have different corrosion rate trend. Temperature increase from 40 ˚C to 60 ˚C on API 5CT sample will increase the value of the corrosion rate, on the other hand increasing the temperature from 60 ˚C to 80 ˚C will cause the corrosion rate to decrease. The highest value of the corrosion rate on API 5CT L80 observed on 95 ˚C. The value of the corrosion rate each temperature are influenced by the layer of corrosion product formed on the surface of the specimens which analyzed by using scanning electron microscope (SEM) and x-ray diffraction (XRD).

Page 1 of 1 | Total Record : 7

 1 

Filter by Year

2019 2019


Reset
Filter By Issues
All Issue Vol. 3 No. 1 (2020): April Vol. 2 No. 3 (2019): Desember Vol. 2 No. 2 (2019): Agustus Vol. 2 No. 1 (2019): April Vol. 1 No. 2 (2018): Desember Vol. 1 No. 1 (2018): Agustus