https://msr.bkstm.org/index.php/msr/issue/feed 2026-02-01T19:25:32-08:00 Dr. Ubaidillah ubaidillah_ft@staff.uns.ac.id Open Journal Systems <p><strong>Mechanical Science Reports </strong>is an open access journal published by Badan Kerjasama Teknik Mesin (BKSTM) Indonesia and is engaged in the scope of energy conversion such as new renewable energy, emissions and combustion, fuels and lubricants, mass and heat transfer, thermal and fluid engineering, energy computing, power plant engineering, nano and pico energy, energy materials, energy storage and devices, and other things about energy conversion.</p> https://msr.bkstm.org/index.php/msr/article/view/26 2025-11-06T18:36:50-08:00 Ikhfan Reksi Ramadhani ramadhaniikhfan@gmail.com Moh. Jufri jufri@umm.ac.id Iis Siti Aisyah siti@umm.ac.id

<p>In the manufacture of Pipes with API (American Petroleum Institute) 5 L specifications using X52 material with the SAW (Submerged Arc Welding) welding method, the toughness value of the material after welding has not been met. So there needs to be a solution to achieve the toughness value on WM. Soin this study the author conducted an experiment on the impact of variations in air, water and SAE 40 oil cooling media and the provision of tempering on the X52 welding results which were reviewed from the results of hardness, toughness and microstructure values. So that it can determine the variation of cooling media and the provision of tempering that has the best welding results. The test results showed the highest hardness on WM of 228.3 HV with air cooling, while the lowest was 198.6 HV in oil media with tempering. Conversely, the highest toughness was achieved in oil media with tempering of 172.6 Joules, and the lowest in air media without tempering of 134 Joules. Microstructural analysis in the WM area shows a decrease in the pearlite phase, namely 63% (air), 62% (water + tempering), and 52% (oil + tempering).</p>

2026-02-01T00:00:00-08:00 Copyright (c) 2026 Mechanical Science Reports https://msr.bkstm.org/index.php/msr/article/view/27 2025-11-06T18:57:32-08:00 Andi Darmawan Setya Budi andydarmawan2805@gmail.com Nur Subeki nursubeki@umm.ac.id Yepy Komaril Sofi'i yepykomarils@umm.ac.id

<p>This study analyzes the effect of Transient Thermal Flame (TTF) heating temperature on impact energy and distortion in Flux Cored Arc Welding (FCAW) of Aluminum 5083 material. Impact testing was conducted at four heating temperature variations: 36°C (without heating), 75°C, 100°C, and 125°C. The results indicate that impact energy reached its peak at 75°C, with a value of 0.2714 Joule/mm², before decreasing at higher temperatures. Distortion testing showed that without heat treatment, distortion was relatively high at 11.53 mm. Applying TTF at 100°C successfully reduced distortion to 2.54 mm, the lowest recorded in this study. However, increasing the temperature to 125°C caused distortion to rise again to 4.31 mm, indicating that suboptimal heat distribution can worsen material deformation. These findings confirm that TTF heating temperature significantly affects the toughness and distortion of Aluminum 5083, with 100°C being the optimal condition to minimize distortion.</p>

2026-02-01T00:00:00-08:00 Copyright (c) 2026 Mechanical Science Reports