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All Journal Jurnal Rekayasa Material, Manufaktur & Energi
Juhana, Riyadi
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Aerospace Engineering Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering

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Penerapan Unsur Tanah Jarang pada Struktur Rangka Persenjataan Militer (Kasus Struktur Rangka F-35 Lightning II) Setiawan, Rudi; Aritonang, Sovian; Andreas N, R Djoko; Juhana, Riyadi
Rekayasa Material, Manufaktur dan Energi Vol 6, No 1: Maret 2023
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v6i1.12627

Abstract

The rare earth element (REE) is not a free metal element or an individual pure mineral, generally in the form of compounds. To obtain rare earth element is done by extraction that requires modern technology with expensive costs. The use of REE is very important for the development of industry and modern technology. Seeing the potential and rapidly developing technology, the Rare Earth Metal in developed countries is currently being used as a mixture of materials in the manufacture of weapons. This journal will discuss the use of rare earth element for the F-35 Lightning II fighter. REE used in F-35 is a mixture for composite Graphite/Epoxy and Graphite/Bismaleimide, as elements Rhenium, Samarium, and Tantalum. This compost is used on the fuselage structure as an example for the Fuselage Center. The results of these alloys can increase aircraft performance, which is resistant to high temperatures, resistant to high pressure, and cannot be detected by radar (stealth). But also before being applied it needs accurate analysis of the negative impacts if the composites are implemented
Fe (Ferro) Analysis of Iron Sand for Iron Pellet Juhana, Riyadi
Rekayasa Material, Manufaktur dan Energi Vol 8, No 1: Januari 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i1.22426

Abstract

Iron sand is the main ingredient of making iron pellets. Iron pellets are the main ingredient of steel plates. Iron pellets for steel industry in Indonesia are still imported from Sweden, Brazil, and Chille.  The reason for import that Ferro content in the local production of iron pellets is less than 60% (Fe 60%).  The effect that Ferro (Fe) quality in the local iron sand as the main ingredient of iron pellets is assumed to be less than 60%. This issue should prove that the assumption is incorrect. The research aims to prove that the level of Ferro contained in the local iron sand is more than or equal to 60%. The research also proves that local iron sand can be finished with quality iron pellets. The results showed that Ferro levels contained in local iron sand ranged from 71.03% to 73.05%, compared to Ferro levels outside of iron sand ranging from 61.00% to 68.90%. Based on the results of a comparison of Ferro rates on iron sand, Ferro content on local iron sand is greater than the iron sand content of Ferro abroad. Then it can be concluded that the level of Ferro in local iron sand is less than 60% is not proven, hence the reason steel industry uses imported iron pellets with the reason of Fe level local iron sand is less than 60%, not based on the results of scientific research.
Co-Authors Andreas N, R Djoko Aritonang, Sovian Rudi Setiawan