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All Journal Jurnal Energi dan Teknologi Manufaktur Logic : Jurnal Rancang Bangun Dan Teknologi Evrimata: Journal of Mechanical Engineering
Samsul Hadi
State Polytechnic of Malang
Automotive Engineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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Tensile Strength Analysis of AISI 1045 Steel Results of Smaw Welding Using Variations of Preheat and Cooling Media Bayu Pranoto; Subagiyo; Samsul Hadi; Muhamad Zidan Wibowo
Logic : Jurnal Rancang Bangun dan Teknologi Vol. 22 No. 3 (2022): November
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (992.897 KB) | DOI: 10.31940/logic.v22i3.214-224

Abstract

In the welding process, there are many factors that need to be considered, including heat input, cooling rate, the material being welded, and the use of added materials, if these factors are not considered, they can cause cracks in the American Iron & Steel Institute (AISI) 1045 material. to determine the effect of preheat variations on tensile strength, the effect of cooling media on tensile strength, and to determine the interaction of preheat variations and cooling media on tensile strength. This research method used experimentally by varying the preheat temperature 250⁰C, 325⁰C, 400⁰C, and the cooling medium was lime, sand, and normal air, then tensile test was carried out. The results showed that the cooling medium affected the tensile strength with the highest tensile strength of 64.35 kg/mm2 on the sand cooling medium, while the preheat variation had no effect on the tensile strength as shown by a graph close to the horizontal straight at the tensile strength ranging from 60 kg/mm2, interaction between preheat and cooling medium has no effect on tensile strength. This is indicated by the tensile strength values ​​that are almost close to each preheat point, namely at a temperature of 250⁰C between 53-67 kg/mm2, at 325⁰C between 56-60 kg/mm2, and a temperature of 400⁰C between 51-64 kg/mm2. In this study it can be concluded that a good cooling medium uses sand media with a preheat temperature of 250⁰C.
Pengaruh Temperatur Pemanasan dan Pendinginan Terhadap Sifat Mekanik Pada Proses Annealing Baja AISI410 Setelah Pengerasan BAYU PRANOTO; Subagiyo Subagiyo; Samsul Hadi
Jurnal Energi dan Teknologi Manufaktur Vol 5 No 02 (2022)
Publisher : Polinema Press, Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/jetm.v5i02.132

Abstract

Stainless steel has good mechanical properties compared to other materials for strength and hardness, usually will experience an increase in hardness after hardening. The purpose of this study was to obtain information about: Value of hardness and strength Impact of martensitic stainless steel annealed with variations in temperature and cooling. The research method used is an experimental method, namely by annealing martensitic stainless steel with variations in temperature and cooling rate. The results were tested for Impact and hardness using the Rockwell C (HRC) method with the category of Research Infrastructure development and science and technology in the field of Mechanical Engineering. The research results are expected to be used as an alternative to improve the mechanical properties of materials, especially in the annealing process. The level of technological readiness to be achieved: 2, because in this study a model is made to test the truth of the basic principle that the hardness level of martensitic steel in annealing is influenced by varying temperatures and cooling.
The Effect of Additional Cetane Booster and Water Methanol Injection (WMI) on Torque and Power in Diesel Engines Rahmat Rahmat; Samsul Hadi
Evrimata: Journal of Mechanical Engineering Vol. 02 No. 01, 2025
Publisher : PT. ELSHAD TECHNOLOGY INDONESIA

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70822/evrmata.vi.111

Abstract

The development of technology in motor vehicles, especially in improving engine performance, is increasingly developing. One of the technological developments is water methanol injection or often abbreviated as WMI, which is injecting water with methanol into the engine combustion chamber through the intake manifold. Methanol can be used by mixing it with fuel or used alone (pure methanol) and is able to produce more heat than fuel. High-quality fuel certainly comes with a high price tag. For that reason, cetane booster is one of the innovations to improve fuel quality. The purpose of this study was to determine the effect of Water Methanol Injection on power and torque in Diesel Engines. In addition, this study also analyzed the interaction of the WMI mixture with the addition of cetane booster. Testing was conducted using a four-wheeled motor vehicle with an Elf Long 2771 CC engine type, using Solar B30 fuel, with three variations of WMI percentage, namely 10%, 30%, and 50%, without cetane booster and with booster. Testing was carried out at 1500 to 2500 rpm with an increase of 500 rpm using a dyno test tool. Data processing was performed using Two-Way ANOVA, commonly known as 2-way ANOVA. The tests conducted were power and torque tests. The study results showed maximum results at 2500 rpm rotation power at a WMI percentage of 30% with the addition of 150ml booster, reaching 77.19 Hp and a torque of 234.43 Nm. Therefore, it can be concluded that the use of a mixture of methanol and water has increased power and torque, although not significantly, while the addition of a 150ml booster has a major influence on the results of the power and torque tests.
Co-Authors Bayu Pranoto Bayu Pranoto Muhamad Zidan Wibowo Rahmat Rahmat Subagiyo Subagiyo Subagiyo