https://msr.bkstm.org/index.php/msr <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> Badan Kerjasama Teknik Mesin (BKSTM) Indonesia en-US Mechanical Science Reports https://msr.bkstm.org/index.php/msr/article/view/3 <p align="justify">Micro Friction Stir Spot Welding (mFSSW) is a derivative of the Friction Stir Spot Welding (FSSW) process that can be used in thin plate welding processes. As a single spot welding process, mFSSW can be considered as an alternative to replace resistance spot welding and rivet processes. Spot welding itself is already widely used in the aerospace, railroad and automotive industries. Therefore, components that are welded using the mFSSW process need to know the strength of the connection against dynamic loads. This study aims to determine the effect of tool geometry on the fatigue strength of welded joints produced through mFSSW welding techniques on brass thin plates with Aluminum AA1100 in the form of repeated loads. In this study, the parameters were varied in the form of tool geometry, where each tool has different pin and shoulder dimensions. After being welded and confirmed to be free from cracks, the specimens will be tensile tested first to obtain parameters and fatigue tests will be carried out. During the fatigue testing process, a fracture phenomenon occurs where specimen damage begins with the formation of an initial hook-shaped crack and ends with a final fracture. The study found that a higher pin tool leads to a smaller tool diameter and smaller keyhole cross-sectional area, which results in an increase in fatigue resistance. The tool with a medium taper geometry produces the longest cycle.</p> Adam Febrian Setyandi Laksita Aji Safitri Pathya Rupajati Gatot Prayogo Ario Sunar Baskoro Copyright (c) 2023 Mechanical Science Reports 2023-10-01 2023-10-01 1 1 1 6 https://msr.bkstm.org/index.php/msr/article/view/6 <p align="justify">The cutting tools have a critical wear limit. Its life is essential for machining data for usage and tool replacement planning. One of the challenges in planning is the difficulty of real-time tool life estimation before and after usage. Real-time estimation of tool life before and after use is expected to assist the Production Planning and Control (PPC) department in selecting tools based on their remaining life, estimating the number of machined products, and planning timely tool replacements. A system has been designed to estimate tool life before and after usage to address this issue. The outcome of this research is the conceptual design of the tool life estimation system and the interface design illustrating the results. The tool life estimation system consists of five pages with several essential features. Firstly, the login page for user authentication and authority control. Secondly, the main page presents two menu options, namely insert registration, and insert list. Thirdly, the insert registration page is used to register the usage of a new tool based on the tool's identity, machining process, and machining parameters. Fourthly, the insert list page displays a list of registered tools, the estimation of new tool life based on the Taylor equation, and the estimation of remaining tool life. Lastly, the new project and insert history page is used to estimate the number of workpieces that can be processed by the selected tool, estimate the remaining tool life after usage, and display the tool usage history.</p> Annisa Diamona Rozi Sri Raharno Copyright (c) 2023 Mechanical Science Reports 2023-10-01 2023-10-01 1 1 7 20 https://msr.bkstm.org/index.php/msr/article/view/7 <p align="justify">Connecting metals becomes a technique for generating materials with the most desirable qualities. Stainless steel and carbon steel will be blended for this research. According to the author's search findings, a bibliometric examination of dissimilar welding between stainless steel and carbon steel was conducted in 2022. This issue is intriguing to explore for a reason stated. The findings of the bibliometric study may contribute significantly to the future expansion of research. The information input gained may motivate researchers to uncover research-relevant flaws. A total of 748 relevant articles will be analyzed for this purpose. This article examines the link between scientific research conducted by local and international collaborating writers and the topic's development. The data indicate that this area of study is expanding. Mechanical property testing and microstructure analysis are the most often used parameters. In addition to exposing the correlation and dominance of publications, bibliometric analyses illustrate the topic's progression through time. The analysis's findings on dominance may serve as a guide for future studies on the topic. In addition, the analytical findings might identify themes or issues that were never addressed in prior research.</p> Dian Ary Ubaidillah Triyono Nurul Muhayat Bhre Wangsa Lenggana Siti Aishah Abdul Aziz Copyright (c) 2023 Mechanical Science Reports 2023-10-01 2023-10-01 1 1 21 38 https://msr.bkstm.org/index.php/msr/article/view/8 <p align="justify">Aluminum alloy such as Al6083 series has a good properties in forming, welding, machining and corrosion resistance. During life cycle of engineering products such as ships, pipes or others which operate on-shore or off-shore, sea water become cause factor of metal corrosion because it induces corrosive environment to metal. In this case then the product need a necessary techniques to prevent corrosion, one of them is by coated it through anodizing processes. In this research, pore sizes and corrosion rate of anodized aluminum 6083 alloy was studied by varying the operating voltage of process of 15V, 20V, and 25V. The other variables were controlled during the research, i.e. electrolyte temperature within ranges of 28 ± 2ºC, electric current of 1 A, distance between the anode and cathode of 20 mm, processing time for 10 minutes and using 15% of citric acid (C₆H₈O₇) as the electrolyte solution. The pore sizes were acquired by taking photos and automatic data display feature to determine pore sizes using the FlexSEM 1000 II apparatus. Data on corrosion rate data were collected using the Autolab PGSTAT204 apparatus. From the results it is known that using citric acid as an electrolyte during the anodizing process obtained an optimal point at a voltage of 20V with the largest pore size of 65.8 nm and a corrosion rate value of 0.00533 mm/year. This shows that increasing the voltage to certain value and using citric acid (C₆H₈0₇) as an electrolyte can improve corrosion resistance due to the formation of aluminum oxide on the surface of the specimen.</p> Burhanudin Candra Wicaksono Moch. Syamsul Ma’arif Iis Siti Aisyah Wahyu Caesarendra Copyright (c) 2023 Mechanical Science Reports 2023-10-01 2023-10-01 1 1 39 46 https://msr.bkstm.org/index.php/msr/article/view/9 <p align="justify">The automotive industry, particularly the aerospace industry, frequently uses resistance spot welding. Connection failure is often caused by several things, namely the plate thickness factor. For this test, a combination of two kinds of plate thickness mixtures was used, namely 0.8 + 0.6 mm and 0.8 + 0.8 mm. Through several tests, the quality of the welding results will be compared using the same welding parameters. Tensile test testing cannot be used to see welding results. However, additional testing, including macrographic and hardness tests, is required. The tensile test of the two combinations gave higher results than the previous industry standards, namely 383.60 lbf and 344.27 lbf respectively. For the macrographic test results, the penetration value for variations with a thickness of 0.8 + 0.6 mm corresponds to the minimum and maximum standard values of (20.00 ÷ 80.00), more specifically 37.2% ÷ 74.6%. As for the thickness variation of 0.8 + 0.8 mm, it is standard but very close to the maximum value of 45% ÷ 79.2%. For the size of a nugget or spot weld the two mixtures are very good and go beyond current principles. Furthermore, for the final results of the hardness test with the Vickers Microhardness technique, the hardness value of the weld piece from the weld point area to the parent metal increases due to the effect of using welding which will cause softening of the 2024 T-42 aluminum material. In the end, the hardness value of each thickness variation will be different due to different parameters.</p> M Audris Daniswara S Iis Siti Aisyah Nur Hasanah Agussalim Tim Pasang Copyright (c) 2023 Mechanical Science Reports 2023-10-01 2023-10-01 1 1 47 60