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Muhammad Ichsanudin
Program Studi Teknik Metalurgi, Jurusan Teknik Pertambangan, Fakultas Teknologi Mineral, UPN “Veteran” Yogyakarta
Chemical Engineering, Chemistry & Bioengineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Analisis Korosi pada Filter Feed Pump Studi Kasus pada Waste Water Treatment Plant Muhammad Ichsanudin; Imam Prabowo; M. Nasirudin
Journal of Metallurgical Engineering and Processing Technology Vol 3, No 2 (February 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v3i2.8748

Abstract

Pompa sentrifugal merupakan jenis peralatan yang paling banyak digunakan di industri sehingga studi mengenai korosi pada komponen pompa sangat penting dilakukan. Degradasi material melalui korosi merupakan hal yang pasti terjadi baik secara cepat maupun lambat. Penelitian ini bertujuan untuk menentukan faktor terbesar penyebab terjadinya korosi dan menentukan jenis-jenis korosi yang terjadi pada  filter feed pump yang terinstal pada waste water treatment plant. Identifikasi kegagalan dilakukan dengan melakukan pengamatan secara visual dan studi literatur mengenai data-data operasi, inspeksi, perbaikan, dan penggantian di lapangan. Dari data-data tersebut, dilakukan analisis agresivitas fresh water, analisis operasi dan perawatan penyebab kegagalan korosi pada komponen pompa, dan jenis korosi yang terjadi pada komponen pompa. Selain itu, juga dilakukan analisis mengenai kemungkinan kombinasi penyebab kegagalan korosi antara reaksi redoks dengan pembebanan yang menyebabkan stress corrosion cracking dan fatigue corrosion. Berdasarkan studi yang dilakukan, diperoleh bahwa korosi yang terjadi disebabkan karena faktor operasi, perawatan, dan lingkungan. Kesalahan perawatan merupakan kesalahan yang paling dominan sebagai faktor penyebab korosi. Tidak dilakukanya predictive maintenance menyebabkan kerusakan yang luar biasa pada casing cover pompa. Faktor perbedaan oksigen juga menyebabkan kegagalan pada casing, wear ring eye, bearing bracket, dan shaft. Hasil identifikasi jenis-jenis korosi yang terjadi pada komponen filter feed pump antara lain: uniform corrosion, pitting corrosion, crevice corrosion, stress corrosion cracking (SCC), fatigue corrosion, erosion corrosion, and cavitation corrosion.
Analisis Sifat Mekanik Material Baja Karbon Rendah ST 37 Akibat Dari Pengujian Tarik Berdasarkan Data Manual dan Komputer Imam Prabowo; Muhammad Ichsanudin
Journal of Metallurgical Engineering and Processing Technology Vol 2, No 3 (July 2022) Special Edition
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v2i3.9386

Abstract

ST 37 Steel is categorized as a low carbon steel which has a composition of carbon around0.005 to 0.3% weight. It has good ductility, flexibility, weldability and formability so can be applied for automotive industry’s components as well as material constructions. Unfortunately, it does not possess an excellent hardness and wear resistance. In this research, ST 37 was subjected to tensile testing to understanding its mechanical properties of ST 37 Steel by comparing the data obtained from manual and computerized procedures. The tensile testing was conducted by Universal Testing Machine (Tarno Grocki), applying ASTM E8/E8M. The results of the experiments revealing the ultimate tensile strength of ST 37 Steel based on computerized and manual procedures are 524,03 MPa and 511,44 Mpa respectively. In addition, the Young modulus of ST 37 Steel based on computerized and manual procedures are 524,03 MPa and 511,44 Mpa respectively. In addition, the Young modulus of manual and computerized procedures are 16,338 GPa and 3,598 Gpa consecutively. Moreover, the yield strength was 411,03 Mpa. The differences between manual and computerized procedures were due to sampling time, parallax and cosine errors and the distinct number of data. Furthermore, the surface of the material after tensile testing showed ductile fracture mechanism in which the fracture was shaped like a cup and cone and formed an angle of 45o. The surface is also displaying a filamentous shape because of the tensile force.
Pengaruh Temperatur Terhadap Hasil Uji Impak Baja Karbon Rendah ST 37 Muhammad Ichsanudin; Imam Prabowo
Journal of Metallurgical Engineering and Processing Technology Vol 2, No 3 (July 2022) Special Edition
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v2i3.9381

Abstract

Salah satu permasalahan terpenting di industri otomotif adalah mengenai ketangguhan material. Ketangguhan merupakan kemampuan material dalam menyerap energi sampai patah / gagal, biasanya diukur dengan menggunakan motode uji impak dengan standar ASTM E 23. Pengujian impak pada baja karbon rendah ST 37 sangat penting dilakukan karena baja karbon ST 37 merupakan salah satu material yang banyak digunakan di industri otomotif seperti: roda gigi, poros, dll. Metode yang dilakukan yaitu dengan memvariasikan temperatur material yaitu: temperatur ruang (24,7 °C), -40 °C, -20 °C, 40 °C, dan 80 °C. peralatan yang digunakan yaitu mesin uji impak Wolpert dengan kapasitas 300 J. berdasarkan hasil pengujian, diperoleh bahwa material baja karbon ST 37  mengalami patah ulet pada temperatur kamar (24,7 °C) dan diatasnya (40 °C dan (80 °C) serta mengalami patah getas pada temperatur ekstrim (-20 °C dan -40 °C). Material baja karbon termasuk material BCC yang mengalami transisi dari patah ulet ke getas pada pada temperatur kamar (24,7 °C) ke temperatur ekstrim -20 °C. Material getas hanya membutuhkan energi yang kecil untuk berdeformasi plastis sehingga membentuk patahan sudut 90° tanpa adanya elongasi. Sedangkan material ulet membutuhkan energi yang banyak untuk berdeformasi plastis sehingga membentuk patahan sudut 45° dengan adanya elongasi. Karena pada hakikatnya, energi kinetik beban impak akan berubah menjadi energi untuk mendeformasi plastis material.
Peningkatan Nilai Kekerasan Baja Karbon Rendah AISI 1018 melalui Proses Pack Karburizing dengan Media Batok Kelapa Imam Prabowo; Muhammad Ichsanudin; Abdu Halim Wibowo; Fajar Paundra; Eko Pujiyulianto
Journal of Metallurgical Engineering and Processing Technology Vol 3, No 2 (February 2023)
Publisher : UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmept.v3i2.8701

Abstract

Low carbon materials are one of the steels which have a composition of carbon ranging from 0.005 to 0.3%. Generally, these materials have good ductility and flexibility so they are good enough to be applied for automotive industry’s components. Unfortunately, they do not possess an excellent hardness as well as wear resistance. Thus, in order to enhance the hardness and wear resistance, carburizing is obligatory required. The carburizing process is a diffusion of carbon from the higher to lower concentration in a high temperature condition, following the gradient concentration. In addition, the process demands a source of active carbons and energizer. In this study, the coconut shells are possibly harnessed as a high-rich carbon material besides charcoals due to its availability and environmentally-friendly materials. Hardness test is measured in ten distinct points by using vicker-hardness scale in accordance with ASTM E 384. The hardness of the AISI 1018 increases after pack carburizing process by nearly 20 HVN. It grows from 131 HVN before the process to 150 and 165 HVN after the heating by 900°C and 950°C respectively. The increase is affected by the diffusion of carbon from coconut shells into the layer of AISI 1018 in which the coconut shells are having a higher carbon content compared to the layer. Furthermore, the higher heating temperature will accelerate the diffusion rate of carbon. As a result, the hardness of AISI 1018 at the higher heating temperature will also become larger.
Co-Authors Abdu Halim Wibowo Eko Pujiyulianto Fajar Paundra Imam Prabowo Imam Prabowo M. Nasirudin