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All Journal Jurnal Teknik Mekanika: Majalah Ilmiah Mekanika
Anton Sudiyanto
Program Studi Teknik Pertambangan, Fakultas Teknologi Mineral Universitas Pembangunan Nasional “Veteran” Yogyakarta Jl. SWK 104 (Lingkar Utara), Yogyakarta 55283 Indonesia
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Rancangan Sistem Penyaliran Pada Lokasi Disposal Tambang Nikel Butungan, Jeragustivia; Cahyadi, Tedy Agung; Sudiyanto, Anton; Amrin, Dedy; Siri, Hasywir Thaib
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 18 No 1 (2019): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (802.833 KB) | DOI: 10.26874/jt.vol18no1.92

Abstract

Penangan air permukaan pada lokasi disposal tambang nikel merupakan hal yang pokok agar air tidak menjadi penghambat dari produksi dan lingkungan sekitar tambang. Tujuan dari penelitian ini ialah merancang sistem penyaliran pada disposal, sehingga air limpasan yang berasal dari daerah tangkapan hujan tidak langsung mengalir menuju sungai atau danau yang dapat mengakibatkan pencemaran lingkungan. Metode penelitian yang dipakai ialah curah hujan diolah dengan beberapa pendekatan alternatif yang bertujuan untuk merancang dimensi dari saluran terbuka dan kolam pengendapan. Hasil yang didapatkan rancangan dimensi saluran terbuka dan kolam pengendapan dengan menggunakan curah hujan rata-rata sudah dapat mengalirkan dan menampung air limpasan sebelum dialirkan menuju sungai dan danau. Kata kunci: Rancangan penyaliran, disposal, saluran terbuka, kolam pengendapan
Mechanical Properties Of Pack Carburized AISI 4340 With Variation Energizer Composition of Barium Carbonate (BaCO3) And Sodium Carbonate (Na2CO3) Setiawan, Agris; Yusmania, Sapna; Sudiyanto, Anton
Mekanika: Majalah Ilmiah Mekanika Vol 22, No 1 (2023): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v22i1.63870

Abstract

This research aimed to determine the mechanical strength of American Iron and Steel Institute (AISI) 4340 steel after pack carburizing with a combined variation of barium carbonate (BaCO3) and sodium carbonate (Na2CO3) as an energizer. Combination of two variations of energizer materials as an alternative to improve mechanical properties. The various ratios of energizer: 40/60, 50/50, and 60/40% w/w. The mechanical test was conducted to determine tensile (American Society for Testing and Material-ASTM E-8), impact strength (ASTM E-23), Rockwell hardness (ASTM E-18), and microstructure characterization (ASTM E-3). Both type specimens were temperature pack carburized was 950 ℃, and the holding time was 3 hours. Results showed that Specimen C had the lowest ultimate tensile strength mean value of the other specimens, which was 333.43±30.22 MPa. The impact test results showed that the lowest impact energy value was found in Specimen C, which is 4.32 Joules, and the highest impact energy value was found in specimens without treatment, which was 15.80 Joules. The microscope observation indicated that the specimen's microstructure was martensite structure increase, and the results of the hardness test were influenced by the martensite phase.
Co-Authors Amrin, Dedy Butungan, Jeragustivia Cahyadi, Tedy Agung hasywir thaib siri, hasywir thaib Setiawan, Agris Yusmania, Sapna