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All Journal Journal of Engineering and Scientific Research (JESR) Teknika Sains : Jurnal Ilmu Teknik Jurnal Rekayasa, Teknologi, dan Sains Kronologi Jurnal Bakti Masyarakat Manajemen TeknoKreatif: Jurnal Pengabdian kepada Masyarakat Journal of Civil Engineering and Vocational Education
Oktavia, Amelia
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Transportation Other

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Analisa Kinerja Jalur Kereta Api Segmen Tanjung Karang – Kotabumi Menggunakan Metode Indonesia Yandaru, Arifian Fahmi; Oktavia, Amelia; Dharmawan, Weka Indra
TEKNIKA SAINS Vol 10, No 2 (2025): TEKNIKA SAINS
Publisher : Universitas Sang Bumi Ruwa Jurai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24967/teksis.v10i2.4546

Abstract

Analisis kapasitas lintas jalur kereta api untuk menentukan jumlah maksimum kereta yang dapat dioperasikan pada infrastruktur dan interval tertentu dalam kondisi operasional saat ini. Tujuan dari penelitian ini adalah untuk mengukur kapasitas lintas jalur kereta api dan mengevaluasi tingkat pelayanan (Level of Service) pada segmen Tanjung Karang–Kotabumi menggunakan Metode Indonesia. Penelitian dilakukan melalui survei visual untuk menilai kondisi fisik jalur rel, kemudian dianalisis menggunakan Metode Indonesia, yaitu metode yang diterapkan oleh PT KAI untuk menghitung kapasitas lintas jalur kereta api di Indonesia. Hasil analisis kapasitas lintas dan Level of Service pada kondisi eksisting (full single track) menunjukkan bahwa kapasitas teoritis rata-rata mencapai 120 kereta per hari, kapasitas praktis 84 kereta per hari, kapasitas terpakai 58 kereta per hari, dan kapasitas tersisa 26 kereta per hari. Dari total petak jalan, enam petak memiliki Level of Service C (cukup baik, jadwal masih stabil), tiga petak Level of Service D (cukup padat dan sensitif terhadap gangguan), serta empat petak Level of Service E (padat dan rawan keterlambatan). Lebih lanjut, hasil perhitungan kapasitas lintas setelah rencana pembangunan full double track berdasarkan Grafik Perjalanan Kereta Api tahun 2025 menunjukkan kapasitas praktis rata-rata sebesar 90 kereta per hari, dengan kapasitas terpakai 58 kereta per hari dan kapasitas tersisa 136 kereta per hari.
Analysis of Hardness Test and Microstructure Test of R.54 Type Railway Rail with Variations in Heat Treatment Cooling Media Oktavia, Amelia; Tabitha, Adinda Kanaya; Drajat, Bambang; Pujiyulianto, Eko
Journal of Engineering and Scientific Research Vol. 7 No. 2 (2025)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v7i2.175

Abstract

Rail steel R.54 is a steel that is included in high carbon steel. Rail steel R.54 has a carbon element of 0.60-0.80% allowing the hardening process to be carried out with appropriate heat treatment . This type of research is an experimental laboratory study. The study aims to determine the effect of variations in cooling media on the observation of microstructure and hardness values in the hardening process of rail steel R.54. The Vickers method with a load of 500 gf is one of the important aspects in hardness testing. The results showed that the hardness value without heat treatment was 383.93 HV and the hardness value after heat treatment with three variations of cooling media, namely soapy water of 669.13 HV, 35% table salt (NaCl) of 689.14 HV, and new oil of 835.50 HV. The three cooling media can be concluded that the highest level of steel hardness is achieved in specimens that are hardened and cooled with new oil cooling media. The viscosity of new oil affects the hardness level of R-54 rail steel. The hardness level of R-54 rail steel will increase along with the increasing viscosity of the oil that is inserted into the cooling medium of R-54 rail steel after the quenching process. The results of observations of the microstructure of R-54 rail steel samples show that there is a phase change without heat treatment that is formed is ferrite and pearlite to form ferrite , austenite and martensite phases due to the heating process of austenite which is cooled rapidly in the cooling medium.
Co-Authors Akbar, Aldharin Rizky Aryani, Marnida Condro, Anita Lestari Dewi Fadilasari Drajat, Bambang Eko Pujiyulianto Galih Rio Prayogi Juansyah, Yan Julita Hayati Jumari Jumari M Gilang Indra Mardika Maulana, Muhammad Irsal Michael Michael Nurul Husna Ofianto, Ofianto Oktarina, Devi Prayoga, Irfan Ahmad Rina Febrina, Rina Situmeang, Martin Juharlin Tabitha, Adinda Kanaya Weka Indra Dharmawan Yandaru, Arifian Fahmi