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All Journal METANA JDM (Jurnal Dinamika Manajemen) Prosiding Seminar Nasional Teknoka DHARMA EKONOMI Jurnal Pengelolaan Laboratorium Pendidikan Metalurgi Jurnal Ilmu Manajemen dan Akuntansi Terapan Prima Ekonomika : Jurnal Ekonomi dan Bisnis Jurnal TIKOMSIN (Teknologi Informasi dan Komunikasi Sinar Nusantara) Journal of Practical Computer Science (JPCS) Makara Journal of Technology Prosiding Seminar Nasional Teknik Sipil UMS Metalurgi Jurnal Pengabdian Masyarakat Ilmu Komputer Jurnal Pengabdian Masyarakat Teknologi dan Pendidikan (MANTAP) Journal of Information Technology, Computer Engineering and Artificial Intelligence (ITCEA)
Sri Harjanto
Departemen Metalurgi dan Material, Fakultas Teknik, Universitas Indonesia, Depok 16424, Indonesia
Religion Arts Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Journal : Makara Journal of Technology

 1 
Effect of Contact Time on Interface Reaction between Aluminum Silicon (7% and 11%) Alloy and Steel Dies SKD 61 Suharno, Bambang; Nurhayati, Neni Octapiani; Arifin, Bustanul; Harjanto, Sri
Makara Journal of Technology Vol. 11, No. 2
Publisher : UI Scholars Hub

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Effect of Contact Time on Interface Reaction between Aluminum Silicon (7% and 11%) Alloy and Steel Dies SKD 61. Die soldering (die sticking) is a defect of metal casting in which molten metal “welds” to the metallic die mold surface during casting process. Die soldering is the result of an interface reaction between the molten aluminum and the die material. Aluminum alloy with 7 and 11% silicon and SKD 61 die steel are the most common melt and die material used in aluminum die casting. This research is done to study the morphology and the characteristics of the formed AlxFeySiz intermetallic layer during interface reaction at dipping test. The samples of as-anneal SKD 61 tool steel was dipped into the molten of Al-7%Si held at temperature 680oC and into molten Al-11%Si held at temperature 710oC with the different contact time of 10 minutes; 30 minutes; and 50 minutes. The research results showed that the interface reaction can form a compact intermetallic layer with AlxFey phase and a broken intermetallic layer with AlxFeySiz phase on the surface of SKD 61 tool steel. The increasing of the contact time by the immersion of material SKD 61 tool steel in both of molten Al-7%Si and Al-11%Si will increase the thickness of the AlxFeySiz intermetallic layer until an optimum point and then decreasing. The micro hardness of the AlxFeySiz intermetallic layer depends on the content of the iron. Increasing of the iron content in intermetallic layer will increase the micro hardness of the AlxFeySiz. This condition happened because the increasing of Fe content will cause forming of intermetallic AlxFeySiz phase becomes quicker.
Mechanical Alloying-assisted Coating of Fe–Al Powders on Steel Substrate Noviyanto, Alfian; Harjanto, Sri; Widayatno, Wahyu Bambang; Wismogroho, Agus Sukarto; Amal, Muhamad Ikhlasul; Rochman, Nurul Taufiqu
Makara Journal of Technology Vol. 24, No. 3
Publisher : UI Scholars Hub

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The coating layer of Fe–Al powders on the steel substrate was prepared by mechanical alloying at room temperature. Fe, Al, and the steel substrates were milled with high-energy ball milling for 32 h with a ball-to-powder ratio of 8 in an argon atmosphere to prevent oxidation during milling. Although mechanical alloying was performed for 32 h, no new phases were observed after mechanical alloying, as analyzed by X-ray diffraction. However, the crystallite size of the milled powders for 32 h decreased by factor two compared with the initial powders. Scanning electron micrographs showed that the coating layers formed >8 h after mechanical alloying. The intermetallic Fe3Al formed after the substrate was annealed at 500 ℃.
Co-Authors Abidin, Faizinal Agus Sukarto Wismogroho, Agus Sukarto Agustiningsih, Yuliana Ahmad Zakiyuddin Akhmad Herman Yuwono Amal, Muhamad Ikhlasul Andriyah, Lia Andriyah, Lia Arbi Dimyati Ari Wibowo Bambang Suharno Bustanul Arifin Duroriyatul Aulya, Duroriyatul Eko Sulistiyono, Eko Eny Kusrini Erryani, Aprilia Firdiyono, Firdiyono Florentinus Firdiyono Hakim, Rifaldi Ali Hanny Hafiar Heru Sulistiyo, Heru Ika Kartika Irawan, Januar Kawigraha, Aji Lalasari, Latifa Hanum Lalasari, Latifa Hanum Marzuki Silalahi Muslimin Muslimin N, Elfi Natasha, Nadia Chrisayu Nofrijon Sofyan, Nofrijon Noor Salim Noviyanto, Alfian Nurhayati, Neni Octapiani Nurul Hidayati Nurul Taufiqu Rochman P, Nur Vita Pudji Untoro Raharja, Bayu Dwi Raharjo Raharjo Raharjo, R Retno Tri Vulandari Rokhmanto, Fendy Sefriani, Eka Widya Senja Rum Harnaeni Setiyowati Setyawan, Albertus Deny Heri Sri Siswanti Suharyanto, Ariyo Sulistiyowati, Arini Sutono -, Sutono Teguh Susyanto Thaha, Yudi Nugraha Tri Arini, Tri Tri Irawati, Tri Tri Vulandari, Retno Wahyu Bambang Widayatno, Wahyu Bambang Waskitho, Anggit Widhi Wijayanto, Hendro Winarti HS, Endah Yunita, Fariza Eka