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All Journal Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Sains Materi Indonesia Majalah Ilmiah Pengkajian Industri Metalurgi Jurnal Ilmiah Teknik Mesin Poros Journal of Materials Exploration and Findings (JMEF) Makara Journal of Science Makara Journal of Technology Metalurgi Recent in Engineering Science and Technology
Eddy S Siradj
Department Of Metallurgy And Materials Engineering, Universitas Indonesia
Aerospace Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Failure analysis on tube arm cylinder hydraulic excavator Pratama, Fikri Wahyu; Siradj, Eddy Sumarno; Rahman, Okky Helja Octora Syahida
Jurnal Pendidikan Teknologi Kejuruan Vol 5 No 4 (2022): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v5i4.29423

Abstract

The Failure on tube rod arm cylinder hydraulic excavator caused to lose production and processing time on mining site. Investigation included visual inspection, chemical analysis, metallography analyze, and microhardness test. Tube material used high silicon material type while the standard used ST52 carbon steel type. The tube was broken and crack to several pieces. The chemical composition of the tube has different in sulfur and silicon content. From hardness test with micro hardness method, sample tube broken has lower hardness compared to standard hardness. Metallography analysis obtained the phase of tube has same phase with standard which is ferrite and pearlite phase but has different grain size. Based on this study, it can be resumed failure on tube is because impurities and different specification on raw material.
Risk indentification on superheater pipeline boiler of 600 MW power plants using a risk based inspection (RBI) method Rahman, Okky Helja Octora Syahida; Pratama, Fikri Wahyu; Siradj, Eddy S
Jurnal Pendidikan Teknologi Kejuruan Vol 5 No 4 (2022): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v5i4.29523

Abstract

Steam power plants are the most efficient type of power generation and can make a significant contribution to the demand for electricity resources. Steam power plants, in general, utilize energy derived from seawater to be process into steam in boilers so that often many pipe failures have occurred due to thinning due to corrosion caused by inappropriate water quality in small units and difficult to detect continuously. In general, inspection planning related to pipe thinning in steam power plants shows a minimal trend compared to inspections in the oil & gas industry. Moreover, it has no basic policy as to how inspection intervals and piping methods will be carry out. In this study, it carried out with the aim of conducting a risk assessment of boiler pipe failure so that it can provide a more optimal overview of the inspection plan. Analysis using Risk Based Inspection (RBI) will be used as a research reference to create the most effective and efficient inspection system as to minimize the impact and expenses cost in pipeline maintenance. After RBI assessment, the inspection plan for superheater pipeline on boiler line will be held every 2 years.
Evaluation of microstructure high chrome austenitic stainless-steel grade 253MA after creep test at temperature of 700°C Alviana, Rifda Muthia; Anwar, M Syaiful; Siradj, Eddy S
Jurnal Pendidikan Teknologi Kejuruan Vol 6 No 1 (2023): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v6i1.31523

Abstract

High Chrome Austenitic Stainless-Steel grade 253 MA is a material that widely used for high temperature. This is due the fact this material has excellent mechanical properties and creep resistance. However, changes in microstructure can occur in long-term use, which will affect the creep resistance (shortened service life of the material). The microstructure of High Chrome Austenitic Stainless-Steel 253 MA creep test specimens was investigated. Creep testing at a temperature of 700 °C with a loading of 150 MPa was carried out. The cold rolling process with 53% reduction in thickness was applied followed by annealing at 900°C, 1000°C, and 1100°C for 3600s to obtain different grain size. Grain size after annealing and after creep test was measured to see the effect of annealing temperature on the grain size of tested steel and to see its effect on creep resistance based on the creep test conducted. Grain size and morphology of the phase after creep test were observed by scanning electron microscope and optical microscope
EFFECT OF COOLING-MEDIUM INDUCED INITIAL STRUCTURE BEFORE INTERCRITICAL ANNEALING ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF LOW ALLOY DUAL-PHASE STEEL Romijarso, Toni Bambang; Rohmah, Miftakhur; Ariati, Myrna; Mabruri, Efendi; Siradj, Eddy Sumarno
Metalurgi Vol 38, No 2 (2023): Metalurgi Vol. 38 No. 2 2023
Publisher : National Research and Innovation Agency (BRIN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/metalurgi.2023.727

Abstract

The present research focused on determining the effect of cooling-medium-induced initial structure before the intercritical annealing induced dual-phase structure in the low alloy steel. Low carbon steel, which consists of containing 0.09 wt.% C was heated at 920 °C for 30 minutes to austenitization and then cooled in various media to provide the different initial structures before the IA (intercritical annealing) process. After austenization, the cooling process in the furnace and open-air provided a ferrite-pearlite phase, while the cooling process in water generated full martensite as the initial structure. Afterwards, the sample was intercritical-annealed at 750 °C (temperature between Ac1 and Ac3 lines or intercritical zone) for 10 minutes and then quenched in water. The water quenching after the austenitizing process improved the mechanical strength of steel (919 MPa), compared to the as-received state (519 MPa) due to martensite formation. As the cooling rate increased after the austenitizing process, the tensile strength increased and the elongation decreased. The different structures before intercritical annealing affected the martensite volume fraction and further correlated with improving mechanical properties. The ferrite and pearlite, as the initial structure before the IA process, provide a smaller fraction of martensite (18.36 vol.% for furnace cooling and 27.85 vol.% for open-air cooling). In contrast, the full martensite as the initial structure before IA generates a higher fraction of martensite (39.25 vol.%). The tensile strengths obtained were 512, 516, and 541 MPa with elongations of 29.8%, 30.1% and 32.6% for cooling furnace, open air and water, respectively. The strain-hardening behavior during the intercritical annealing is not affected by the initial process of the structure.
The Remanufacturing of Track Rollers Requires The Application of A Hardfacing Technique, Which is Achieved by Combining Buttering with 309LMo Gas Metal Arc Welding (GMAW) and The TiC-O Flux-core Arc Welding (FCAW) Process Aristotika, Addin; Winarto, Winarto; Ismadi, Sabandi; Siradj, Eddy; Anis, Muhammad
Recent in Engineering Science and Technology Vol. 3 No. 3 (2025): RiESTech Volume 03 No. 03 Years 2025
Publisher : MBI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59511/riestech.v3i3.117

Abstract

The operation of the track rollers is dependent on the frictional forces between the rollers and the track. Furthermore, the presence of moisture-laden sand and mud in the surrounding environment accelerates the corrosion process, leading to a synergistic effect on abrasion wear. The production of new rollers is a highly energy-intensive process, resulting in the emission of significant quantities of carbon dioxide. The main objective of this research was to develop a process for remanufacturing track rollers by integrating hardfacing methods, specifically, combining buttering with gas-metal-arc welding (GMAW) that utilizes 309LMo and flux-core arc welding (FCAW) employing TiC-O. During the GMAW process, currents of 180 A, 220 A, and 260 A were applied at the same time as wire with a diameter of 1.2 mm, whereas the FCAW process involved using currents of 200 A, 250 A, and 300 A in conjunction with a wire with a diameter of 1.6 mm. An evaluation was conducted through mechanical tests and metallurgical analysis to determine the effect of the variable current on the physical and mechanical properties of the hardfill layer. Mechanical tests using the Rockwell method and metallurgical analysis via morphological observation were conducted to assess the performance of the remanufactured track roller. The outcomes revealed that as the current increase in GMAW/FCAW welding, the hardfacing layer became increasingly stiffer, but this effect was offset by the failure of the hardfacing interface to bond correctly, as shown by its insufficient fusion and the formation of cracks and holes that penetrated into the base metal. This study highlights the importance of welding parameters to achieve a balance between hardness in the base and weld metals, diffusion, and the quality of the bond between the two, as a practical and cost-efficient method for the remanufacturing industry.
Co-Authors Alviana, Rifda Muthia Andi Muhdiar Kadir Andon Insani Anne Zulfia Anwar, M Syaiful Aristotika, Addin Bambang Prihandoko Chris Marvin Darminto . Dedi Supriadi Efendi Mabruri Erie Martides Erwin Siahaan Hadi Suwarno harkali setiyono harkali setiyono Hasanudin, Agus Mulyadi Iman, Fauzul Ismadi, Sabandi Iwan Setyadi Johny Wahyuadi Soedarsono Julyadi Julyadi Kadir, Andi Muhdiar M. Kadir, Andi M. Kadir, Andi Mabruri, Efendi Mayang Gita Pradisti Miftakhur Rohmah, Miftakhur Moch. Syaiful Anwar Muhammad Anis, Muhammad Myrna Ariati, Myrna Pratama, Fikri Wahyu Priyo Sardjono Rahman, Okky Helja Octora Syahida Ridwan Setiawan Riyan Sanjaya Romijarso, Toni Bambang S, Harkali S, Harkali Sahari, G.N. Anastasia Septian Adi Candra Sobron Yamin Lubis Suryadi Suryadi Widyastuti Widyastuti Winarto Winarto Wisnu Ari Adi Zainuri, M