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Metalurgi
Published by BRIN Publishing
ISSN : 01263188     EISSN : 24433926     DOI : 10.55981/metalurgi
Core Subject : Science, Engineering,
Industrial & Manufacturing Engineering Materials Science & Nanotechnology
The objective of this journal is the online media for disseminating results in Research and Development and also as a media for a scientist and researcher in the field of Metallurgy and Materials. The scope if this journal related on: Advanced materials and Nanotechnology Materials and Mineral characterization and Analysis Metallurgy process: extractive Ceramic and composite Corrosion and its technological protection Mineral resources manifestation Modelling and simulation in materials and metallurgy Engineering Metallurgy instrument
Arjuna Subject : Ilmu Material (semua kategori) - Ilmu Material (Lain-Lain)
Articles 287 Documents
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PEMBENTUKAN NANOPARTIKEL PADUAN CoCrMo DENGAN METODA PEMADUAN MEKANIK[Manufacturing of Co-Cr-Mo Alloy Nano-Particle by Using Mechanical Alloying]] Sulistioso Giat Sukaryo; Wisnu Ari Adi
Metalurgi Vol 27, No 1 (2012): Metalurgi Vol. 27 No. 1 April 2012
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (929.07 KB) | DOI: 10.14203/metalurgi.v27i1.139

Abstract

AbstrakMetoda pemaduan mekanik adalah reaksi padatan dari beberapa logam dengan memanfaatkan proses deformasi untuk membentuk suatu paduan. Pada penelitian ini dibuat paduan Co-Cr-Mo dengan  proses wet milling dengan variasi waktu milling selama 3, 5, 10, 20, dan 30 jam. Proses wet milling sangat efektif untuk mencegah terjadinya oksidasi dan juga memicu pembentukan paduan Co-Cr-Mo dengan baik. Hasil XRD menunjukkan bahwa telah terjadi pertumbuhan fasa γ pada durasi milling 3, 5, 10, 20, dan 30 jam, berturut-turut sebesar 42,80 %; 67,61 %; 82,94 %, 84,63 % dan 88,92 %. Ukuran kristalit fasa γ sebesar 25,9 nm; 12,5 nm; 5,1 nm dan 4,9 nm seiring dengan meningkatnya waktu milling. Disimpulkan bahwa telah berhasil dilakukan pembuatan paduan nanokristalin Co-Cr-Mo dengan metode pemaduan mekanik lebih dari 85 % dengan waktu milling minimum selama 30 jam. Kata kunci : Co-Cr-Mo, pemaduan mekanik, nano-kristalin AbstractSynthesis of Co-Cr-Mo nano-crystalline by mechanical alloying has been carried out. Mechanical alloying is a solid state reaction of some metals by utilizing the deformation process to form an alloy. In this research, parameter milling time used for making Co-Cr-Mo alloy by wet milling process is 3, 5, 10, 20 and 30 h. Wet milling process is very effective to prevent oxidation and triggers the formation of fine Co-Cr-Mo alloys. Results of XRD pattern refinement shows that Co-Cr-Mo alloys was growth by percentage approximately around 42.80%, 67.61%, 82.94%, 84.63% and 88.92% for milling time 3, 5, 10, 20, and 30 h, respectively. Otherwise, crystalline size measurement after milling time 5, 10, 20, and 30 h obtained around 25.9 nm, 12.5 nm, 5.1 nm and 4.9 nm, respectively. This research concluded that the optimum milling time could obtained synthesizes nano-crystalline of Co-Cr-Mo alloy more than 85% is 30 h. Keywords: Co-Cr-Mo alloy, mechanical alloying,  nano-crystalline
Index, panduan Lia Andriyah
Metalurgi Vol 33, No 1 (2018): Metalurgi Vol. 33 No. 1 April 2018
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (528.029 KB)

Abstract

PROSES DEFORMASI SANGAT TINGGI (SEVERE PLASTIC DEFORMATION) TERHADAP PADUAN Al-5052 HASIL ANILING[Severe Plastic Deformation Process of Annealed Al-5052 Alloy] Ika Kartika
Metalurgi Vol 27, No 3 (2012): Metalurgi Vol.27 No.3 Desember 2012
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (976.72 KB) | DOI: 10.14203/metalurgi.v27i3.229

Abstract

Perilaku Adsorpsi Emas Dari Larutan Ammonium Thiosulfat Dengan Karbon Aktif Dan Resin Penukar Ion [Study of Adsorption Behaviour of Gold from Thiosulfate Solution onto Activated Carbon and Ion Exchange Resin] Wahyudin Prawira M; M Zaki Mubarok
Metalurgi Vol 31, No 2 (2016): Metalurgi Vol. 31 No. 2 Agustus 2016
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (316.106 KB) | DOI: 10.14203/metalurgi.v31i2.161

Abstract

Effective recovery methods of gold from thiosulfate solution are still being studied by many researchers. In this paper, results of gold adsorption tests in ammonium thiosulfate solutions using 3 types of ion exchange resin and activated carbon is discussed. Series of batch adsorpsion tests at room temperature have been carried out within pH range of 7-9 to study Au adsorption behaviour from thiosulfate solution onto four types of adsorbents, loading capacity and adsorption kinetics of each adsorbent. The investigation results show that recovery of gold from pregnant leach solution of gold ore in ammonium thiousulfate can be effectively performed by using a strong-base resin of Lewatit Monoplus MP 800. At a pH range of 7-9, adsorption percentages of Au onto the strong-base resin of Lewatit Monoplus MP exceed 97% after 2 hour and reach a maximum level of 100% after 25 hour at pH 8. In contrast, activated carbon did not exhibit a sufficient performance in recovery of Au from thiosulfate solution, in which the highest adsorption percentage of Au after 25h <80% at pH range of 7-9. The strong base resin of Lewatit Monoplus MP 800 demonstrated the highest loading capacity and fastest adsorption rate followed by weak base resin of Guanidine, polymeric resin with carbon matrix AF5 and activated carbon at pH range of 7-9.AbstrakTeknik perolehan kembali emas yang efektif dari larutan thiosulfat masih terus dipelajari oleh para peneliti. Pada penelitian ini dibahas hasil-hasil percobaan adsorpsi emas dalam larutan ammonium thiosulfat dengan menggunakan 3 tipe resin penukar ion dan karbon aktif. Serangkaian percobaan adsorpsi batch pada suhu kamar dilakukan dalam selang pH 7-9 untuk mempelajari perilaku adsorpsi Au dari larutan thiosulfat pada keempat jenis adsorben, kapasitas adsorpsi dan laju adsorpsi Au pada masing-masing adsorben. Hasil percobaan menunjukkan bahwa perolehan emas dari larutan hasil pelindian bijih emas dalam larutan ammonium thiosulfat dapat dilakukan dengan efektif menggunakan resin penukar ion tipe basa kuat Lewatit Monoplus MP 800. Dalam rentang pH 7-9, persen adsorpsi Au pada resin basa kuat Lewatit Monoplus MP800 melebihi 97% setelah 2 jam dan mencapai level maksimum 100% setelah 25 jam pada pH 8. Sebaliknya, karbon aktif tidak menunjukkan performa yang memadai untuk mengambil kembali Au dari larutan thiosulfat pada mana persen adsorpsi Au tertinggi setelah 25 jam kurang dari 80% dalam rentang pH 7-9. Resin basa kuat Lewatit Monoplus MP 800 menunjukkan kapasitas adsorpsi Au paling tinggi dan laju adsorpsi paling cepat diikuti oleh resin basa lemah Guanidine, resin polimerik bermatriks karbon AF5 dan karbon aktif dalam rentang pH 7-9.
BIOKOROSI DAN TEKNOLOGI PENCEGAHANNYA DI INDUSTRI MINYAK DAN GAS Ahmad Royani; Muhammad Hanafi; Heddy Julistiono; Azwar Manaf
Metalurgi Vol 36, No 3 (2021): Metalurgi Vol. 36 No. 3 Desember 2021
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1774.011 KB) | DOI: 10.14203/metalurgi.v36i3.608

Abstract

Biokorosi atau Microbiologically Influenced Corrosion (MIC) adalah salah satu bentuk korosi lokal yang dihasilkan dari mikroorganisme dan aktivitasnya yang mempunyai dampak negatif pada fasilitas di industri minyak dan gas. Keberadaan mikroorganisme dan aktivitasnya yang kompleks memainkan peranan penting dalam pembentukan biofilm dan produk korosi yang menyebabkan kerusakan peralatan. Meskipun beberapa teknik mitigasi dan pencegahan dalam usaha pengendalian mikroorganisme telah dilakukan, tinjauan tentang mitigasi korosi yang dipengaruhi mikroorganisme masih terbatas. Dalam tinjauan ini, dibahas jenis mikroorganisme terkait biokorosi, pembentukan biofilm, teknik deteksi dan evaluasi mikroorganisme, teknologi pencegahan dan pengendalian mikroorganisme di industri minyak dan gas. Perkembangan teknologi terkini pengendalian mikroorganisme di industri lainnya juga turut dibahas.
TINJAUAN PEMBUATAN NIOBIUM KARBIDA Solihin Solihin
Metalurgi Vol 29, No 1 (2014): Metalurgi Vol.29 No.1 April 2014
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (623.856 KB) | DOI: 10.14203/metalurgi.v29i1.273

Abstract

Studi Pelapisan Komposit Ni-P-Nano Al2O3 Dengan Metode Electroless Co-Deposition [Study of Ni-P-Nano Al2O3 Composite Coating With Electroless Co-Deposition Methode] Yulinda Lestari; Effendi Mabruri; Anne Zulfia Syahrial
Metalurgi Vol 31, No 1 (2016): Metalurgi Vol. 31 No. 1 April 2016
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1358.178 KB) | DOI: 10.14203/metalurgi.v31i1.96

Abstract

The Ni-P-nano powder Al2O3 composite coating have been prepared by electroless codeposition method. It has advantage that the process does not require an electrode, fast deposition rate, good corrosion and wear resistance. In this study, the variable parameters are the addition of nano powder Al2O3 composition. The aim of this research is to determine microstructure phenomenon, phase and crystalinity, chemical composition and distribution on coating surface, and corrosivity Ni-P-nano powder Al2O3 composite coating.The substrate is used stainless steel 410. Substrates have been pre treated in order to activate the surface. Then, substrate immersed in solution that consisting of nickel sulfate, sodium hypophosphite, ammonium sulfate, sodium acetate, lead acetate and nano alumina powder. The substrate is immersed about 60 minutes at a 90±2 °C temperature with speed of 150 rpm. Sample characterization has done by SEM-EDS, XRD, and CMS. Results indicate there is a microstructure visual difference before and after electroless coating process.Based on variable experiment, the optimum nanopowder Al2O3 compositionis 10 gr/l which have given the best paticle distribution and most excellent corrosion resistance.AbstrakPelapisan material dengan komposit Ni-P-nano powder Al2O3 yang menggunakan metode electroless kodeposisi memiliki keunggulan yaitu prosesnya tidak membutuhkan elektroda, laju deposisi yang cepat danmemiliki ketahanan korosi dan ketahanan aus yang baik. Pada penelitian ini, parameter yang divariasikan adalah komposisi penambahan nano powder Al2O3. Penelitian ini bertujuan untuk mengetahui fenomena struktur mikro, fasa dan kristalinitas, komposisi kimia dan distribusi unsur di permukaan coating, danketahanan korosi komposit coating Ni-P-nano powder Al2O3. Substrat yang digunakan yaitu baja tahan karat 410 dilaku awal (pretreatment) untuk mengaktivasi permukaan, kemudian direndam dalam larutan yang terdiri dari nikel sulfat, natrium hypophosphite, ammonium sulfat, sodium asetat, lead asetat dan serbuk nano alumina. Substrat direndam selama 60 menit, dalam suhu proses 90±2 °C dengan kecepatan putaran 150 rpm. Karakterisasi sampel dilakukan menggunakan alat SEM-EDS (scanning electron microscopy-energy dispersive spectroscopy), XRD (x-ray diffraction), dan CMS (corrosion measurement system). Dari hasil percobaan menunjukkan terdapat perbedaan struktur mikro antara substrat logam dasar dan substrat setelahproses electroless coating. Berdasarkan variabel percobaan, untuk komposisi nano powder Al2O3 yang optimum adalah 10 gr/l karena memberikan distribusi partikel dan ketahanan korosi yang paling baik.
cover, daftar isi, abstrak vol 37 Desember 2022 Andriyah, Lia
Metalurgi Vol 37, No 3 (2022): Metalurgi Vol. 37 No. 3 Desember 2022
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1279.335 KB) | DOI: 10.14203/metalurgi.v37i3.692

Abstract

PENGUATAN TEMBAGA MURNI DENGAN TEKNIK EQUAL CHANNEL ANGULAR PRESSING Solihin Solihin; Efendi Mabruri; I Nyoman Gede Putrayasa
Metalurgi Vol 26, No 3 (2011): Metalurgi Vol. 26 No. 3 Desember 2011
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (411.908 KB) | DOI: 10.14203/metalurgi.v26i3.20

Abstract

Penguatan tembaga murni dengan metode Equal Angular Channel Pressing telah dilakukan terhadap tembaga murni. Hasil pengerjaan ECAP dengan jalur ekstrusi ECAP rute Bc, dimana benda kerja diputar 90 ° setiap pass, menghasilkan pembelahan grain menjadi sub-grain yang memiliki ukuran yang menurun drastis dengan sudut butir yang lebih kecil.  Seiring dengan penurunan besar butir, kekerasan tembaga tersebut meningkat drastis. AbstractThe hardness of high purity copper has been increased through Equal Angular Channel Pressing method. The application of ECAP method with extrution rute Bc , in which the sample was rotated 90° for each pass, result in the generation of sub-grain within the grain. The size of new grain (sub –grain) is drastically smaller than initial grain and also has low angle. With the decreasing of grain size, the hardness drastically increases.
THE EFFECT OF ECAP PROCESSING TO HARDNESS, SURFACE MORPHOLOGI, AND CORROSION RESISTANCE OF 6061 ALUMINIUM ALLOYS Vinda Puspasari; I. Nyoman Gede P. A.; Efendi Mabruri; Satrio Herbirowo; Edy Priyanto Utomo
Metalurgi Vol 36, No 2 (2021): Metalurgi Vol. 36 No. 2 Agustus 2021
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1034.463 KB) | DOI: 10.14203/metalurgi.v36i2.589

Abstract

Al-Mg-Si alloys (6xxx) has been widely used as structural materials in building and vehicles because of its excellent strength and corrosion resistance. The improvement of fine grain microstructure which can increase mechanical and physical properties become an interesting field in recent research.. Equal channel angular press is the most promising method to apply severe plastic deformation (SPD) which can produce ultra-fine grain in the bulk material without residual porosity. This study presents some experiments results on the effect of ECAP number of passes variation to the hardness, microstructure, and corrosion behaviour of Al 6061 alloys. The samples were annealed in the furnace with argon gas environment at 530°C for 4 hours and then immersed in liquid nitrogen for 5 minutes before ECAP process. The ECAP process was done with Bc route using dies with 120° of internal channel angle and pass variation of 1, 2, 3, and 4. The optimum hardness is 107.58 HRB in Al 6061 samples with 3 passes of ECAP. The increasing ECAP number of passes leads to a significant grain size reduction from 0 way pass, the grain size is around 10 µm, while for a 4 way pass, the grain size is around 2.5 µm. The corrosion resistance of Al 6061 alloys increased with the increasing number of passes in ECAP process.

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