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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. 3 No. 1 (2020): April" : 7 Documents clear
Pengaruh Perlakuan Alkali-silan terhadap Sifat Mekanis Komposit Hibrid yang Diperkuat Serat Agel dan Serat Gelas : Effect of Alkali-Silane Treatment on Mechanical Properties at Glass Fabric and Woven Agel (Corypha gebanga) Reinforced Hybrid Composites Hendri Hestiawan; Jamasri; Kusmono
Jurnal Metalurgi dan Material Indonesia Vol. 3 No. 1 (2020): April
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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Abstract

The aim of this research is to investigate the effect of alkali-silane on mechanical properties at glass fabric and woven agel (Corypha gebanga) reinforced hybrid composites. The materials used are woven agel fiber, glass fabric, unsaturated polyester resin of yukalac 157 BQTN, and catalyst of methyl ethyl ketone peroxide. Manufacturing techniques used vacuum bagging with a suction pressure of 70 cmHg at room temperature. The woven agel were treated with 4% sodium hydoxide solution for 1 hour, 5% silane solution for 3 hours, and a combined sodium hydoxide and silane solution. The tensile, flexural, and impact test specimens based on ASTM D 638-02, D 790-02, and D 5942-96 standards respectively. The results of tensile, flexural, and impact tests showed that the highest tensile and flexural strength, and impact toughness ​​were obtained on alkali-silane treated hybrid composites, i.e. 78 MPa, 116 MPa, and 38 kJ/m2 respectively. It can be concluded that the alkali-silane treatment effectively improves the mechanical properties of at glass fabric and woven agel reinforced hybrid composites
Pengaruh Waktu Pelapisan Ni dan Komposit Ni/SiC Terhadap Kekerasan dan Ketahanan Abrasi AISI 410 Menggunakan Metode Pulsa Elektrodeposisi Miftakhur Rohmah; Yunita; Moch. Syaiful Anwar; Efendi Mabruri
Jurnal Metalurgi dan Material Indonesia Vol. 3 No. 1 (2020): April
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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Abstract

Stator and Rotor Blades often experience abrasion wear failure during the steam turbine operation, primarily due to solid erosion particles. The Ni-SiC composite coating was prepared on steel by pulse electrodeposition to improve the working life of stator blade steel. This study serves to determine the effect of time coating Ni and Ni-SiC composite on SS 410 on hardness and abrasion resistance. Four samples with 7.9756 x 0.8 x 2.54 cm dimensions were pre-treated; thus, coatings were applied to each sample using watts solution (250 g/l Ni2SO4, 45 g/l H3BO3, and 45 g/l NiCl2, and 30 gr SiC, and 0.25 gr C12H25NaO4S). After coated, Sample 1 and 2 with a difference in Ni coating time are 15 and 60 minutes; Sample 3 and 4 with Ni-SiC coating time is 30 and 90 minutes was observed by hardness and abrasion test. The highest hardness (292.8 HVN) and weight loss of abrasion (13 milligrams) were obtained by 60 minutes coating time of Ni and followed 90 minutes coating time of Ni-SiC. The increase in the time coating of Ni and Ni-SiC composite, the level of hardness layer increases. The abrasion resistance value of the composite layers in the four samples did not show a linear increase with an increase in the value of hardness
Komposit Aluminium 1100 ‐ Nano Alumina Metode Dispersi Mekanik Screen Printing dan Ultrasonic Fogger Accumulated Roll Bonding: Aluminum 1100 - Nano Alumina Composite with Mechanical Screen Printing and Ultrasonic Fogger Dispersion Method on Accumulated Roll Bonding Process Riska Rachmantyo; Aditianto Ramelan; Firmansyah Sasmita
Jurnal Metalurgi dan Material Indonesia Vol. 3 No. 1 (2020): April
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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Aluminum material that is commonly used in life. This material is lightweight, corrosion resistant, tough and good working process. However, strength and hardness are lower than other metals such as steel. Processing needs to be done to get better aluminum mechanical properties. In this study, making a metal matrix composite in which aluminum 1100 as a substrate and 10 nm nano alumina (Al2O3) powder as a reinforcement. The process of making composites uses the method of accumulated roll bonding. The distribution of alumina powder on the aluminum matrix greatly influences the mechanical properties produced, namely its strength and hardness. The distribution process of nano alumina is carried out using screen printing, spray and ultrasonic spray methods. Besides the distribution method, the amount of alumina is also used as a research parameter. Improved optimum mechanical properties were obtained from the ultrasonic spray spray distribution method with the addition of 5 w/0 alumina.
Pengolahan Bittern Sebagai Pembentuk Pupuk Struvite Menggunakan Reaktor Sekat Secara Sinambung Herdiana Septiani; Nikmatuz Zahra; Sutiyono; Luluk Edahwati
Jurnal Metalurgi dan Material Indonesia Vol. 3 No. 1 (2020): April
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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Abstract

Waste salt or bittern is the residual liquid from the salt formation which can not be precipitated again or also can be obtained from the washing water remaining in the purification process. Bittern contains salt such as MgCl2, MgSO4, KCl, and Br2. From the various minerals contained in the bittern, one of the minerals used as the basic ingredient of making struvite fertilizer, named Magnesium. Bittern has not been utilized significantly, this has become one of the goals and benefits of our research, which is making struvite fertilizer using salt waste, which will add up to it’s economic value. Struvite mineral can also be applied in agriculture such as raw material fertilizer, because struvite fertilizer is very beneficial for the growth and development of the plant. The most beneficial characteristic of struvite fertilizer is the slow release of nutrients so it will lessen fertilizer application on plants. Struvite has a very small solubility in water that is 0.02 gr / 100 ml at 0 ºC. Struvite solution (MAP) can be formed from phosphoric acid, ammonium hydroxide, and bittern or salt waste as a source of magnesium with a molar ratio of 2: 1: 1. PH variations carried out include 7 to 11 and the reactor intake air velocity in the range of 0.25-1.25 l / min in a fixed column operated reactor. The resulting dry sludge was analyzed by XRD method for mineral characterization and SEM to determine the composition and morphology of the crystals..
Analisis Hasil Friction Stir Welding Aluminium 5083-H112 Menggunakan Taper Threaded Cylinder Pin dengan Variasi Kecepatan Rotasi dan Translasi: Result Analysis of Friction Stir Welding of Aluminum 5083-H112 Using Taper Threaded Cylinder Pin with Variation in Rotational and Translational Speed Slameto Wiryolukito; Johanes Pratama Wijaya Wijaya
Jurnal Metalurgi dan Material Indonesia Vol. 3 No. 1 (2020): April
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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The technique of joining aluminum with the conventional fusion welding method is still difficult to be applied, because aluminum series has low weldability, therefore, a new method is developed, friction stir welding (FSW) which is a solid-state welding. In this study, the optimization process of the translation speed was carried out using aluminum 5083-H112 workpiece with a thickness of 10 mm. This optimization process includes observing and testing the effect of translational speed on microstructure, strength, hardness and toughness on the weld area. The tool that is used in this optimization process is a taper threaded cylinder pin type, with pin diameters 4 and 7 mm, pin height 9.5 mm, left hand threaded, and the material used is AISI H13. The optimization process produces 3 translation speed parameters, 31.5 mm/min; 50 mm/min; and 63 mm/min with constant rotational speed, 1250 rpm. These three parameters change the microstructure in the weld area, where there are 3 microstructure areas observed, weld nuggets (WN), thermomechanically affected zone (TMAZ), and heat affected zone (HAZ). Whereas mechanical properties such as strength, hardness and toughness tend to decrease along with the increase in welding translational speed.
Pengaruh Nikel (Ni) dan Silikon (Si) Terhadap Struktur Mikro, Sifat Kekerasan, Dan Ketahanan Erosi Dari Paduan Aluminium-Nikel-Silikon (Al-Ni-Si) Budi Hartono Setiamarga; Kus Hanaldi; Rahmatul Aulia Jorji
Jurnal Metalurgi dan Material Indonesia Vol. 3 No. 1 (2020): April
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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Abstract

Paduan Aluminium sering digunakan untuk berbagai keperluan teknik karena sifatnya yang ringan dan tahan korosi[1]. Meskipun demikian, ketahanan erosinya masih perlu ditingkatkan bila hendak diaplikasikan untuk komponen seperti propeler. Pada penelitian ini empat jenis paduan Aluminium-Nikel-Silikon dengan kandungan Al, Ni, dan Si yang berbeda, dileburkan dengan menggunakan tungku listrik. Uji erosive wear dilakukan terhadap keempat jenis paduan Al-Ni-Si dengan menggunakan peralatan Air Jet Erosion dengan serbuk Alumina sebagai partikel abrasifnya. Uji XRD, EDS, metalografi optik, dan uji keras dilakukan untuk memahami sifat erosive wear-nya. Hasil pengujian menunjukkan bahwa senyawa Al3Ni yang keras dan getas akan bertambah banyak dan bertambah besar seiring dengan penambahan komposisi nikel. Kekerasan paduan Al-Ni-Si terbukti meningkat seiring dengan bertambahnya komposisi nikel. Meskipun demikian, kenaikan kekerasan ini justru menurunkan laju erosinya akibat makin mudahnya senyawa Al3Ni yang terlepas. Penurunan kandungan Silikon akan merubah morfologi fasa silikon dari bentuk serpihan pelat menjadi bentuk serat halus. Penurunan jumlah fasa silikon dapat menurunkan laju erosinya walaupun tidak besar.
Pengaruh Temperatur, Waktu Pemanasan, dan Komposisi Energizer BaCO3 terhadap Nilai Kekerasan dan Case Depth pada Proses Pack Carburizing Baja Karbon Rendah Alfirano; Rike Kemala Putri; Anistasia Milandia
Jurnal Metalurgi dan Material Indonesia Vol. 3 No. 1 (2020): April
Publisher : Badan Kerja Sama Pendidikan Metalurgi dan Material (BKPMM)

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Abstract

Low carbon steel produced from the Hot Strip Mill process is widely used for hoe applications. In the application, this steel is expected to have a hardness value of 20 HRC to 41 HRC in accordance with SNI 0331:2011 to avoid failure when experiencing abrasion due to friction with sand and stone. Besides the hoe leaf also requires toughness on the steel core to receive shock loads during agricultural activities. To produce steel with these criteria, a carburizing pack process was carried out. This study was carried to increase the hardness of low carbon steel as a hoe application and determine the optimum temperature, heating time and composition of energizer for the pack carburizing process. In this study, the pack carburizing process was carried out with temperature variations of 850°C to 950°C, variations in heating time of 1-5 hours and variations in the composition of BaCO3 as an energizer of 20% and 80%. To determine the effect of temperature and heating time on hardness and microstructure, carburized steel was characterized for carbon content, hardness testing and metallography. The results of this study indicate that the higher the temperature and the heating time, the hardness of the steel will increase. Microstructure produced after the carburizing pack process is ferrite, pearlite and proeutectoid cementite. The carburizing pack process that produces the best hardness, case depth and microstructure values ​​is at a temperature of 950 ° C for 1 hour in BaCO3 composition of 20%.

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