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All Journal MACHINERY: Jurnal Teknologi Terapan
Soegeng Witjahjo
Politeknik Negeri Sriwjaya
Control & Systems Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering

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PENGARUH PERLAKUAN PANAS NORMALIZING TERHADAP KEKUATAN TARIK PADA BAJA TULANGAN DEFORM PASCA KEBAKARAN Rayel Prialdo; Tri Widagdo; Soegeng Witjahjo
MACHINERY: Jurnal Teknologi Terapan Vol. 2 No. 1 (2021): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (166.198 KB) | DOI: 10.5281/zenodo.4748520

Abstract

The purpose of this study was to determine the effect of normalizing treatment on tensile strength, yield stress and strain of reinforcing steel after fire. Normalizing treatment was carried out at a temperature of 800 ° C with a holding time of 25 minutes and compared the results of post fire reinforcing steel with after normalizing treatment. The goals of the normalizing process vary widely. Normalizing can increase or decrease the strength and hardness of steel, depending on the heat treatment and mechanical properties of the steel prior to the normalizing process. But in general the purpose of the normalizing process is to increase the machinability, grain-structure refinement, homogenization, and regulate or modify the residual stress that exists in steel. From the results of the tensile test after normalizing, the highest tensile strength value was obtained in the specimens cooled with water at 600 ° C at 597.85 N / mm² and the lowest value at 400 ° C with air at 443.9 N / mm². The largest yield stress value was at 600 ° C with water at 416.28 N / mm² and the lowest value at 800 ° C with air at 318.243 N / mm². The greatest value of strain was at 800 ° C with water at 31.66% and the smallest strain at 400 ° C with air at 21.67%.
PENGARUH UKURAN BIJI JARAK PAGAR TERHADAP LAMANYA NYALA API DAN TEMPERATUR YANG DIHASILKAN PADA KOMPOR Andika Nopriansyah Mila; Ahmad Junaidi; Dwi Arnoldi; Soegeng Witjahjo; Baiti Hidayati; Syamsul Rizal; Ali Medi
MACHINERY: Jurnal Teknologi Terapan Vol. 4 No. 3 (2023): Machinery: Jurnal Teknologi Terapan
Publisher : Politeknik Negeri Sriwijaya, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.10122361

Abstract

The availability of fuels, especially fossil fuels, is increasingly scarce, concerns about meeting energy needs in the future are increasing. In urban areas, fuel gas (LPG) is generally used for daily cooking, while in rural areas, kerosene is more commonly used. This significant oil content opens up the possibility to use castor beans as fuel directly. Therefore, in this study the author conducted an experiment entitled "The Effect of Jatropha Bean Size on Fire Intensity and Temperature produced on the Stove". The variable used is jatropha beans weighing 350 grams in each form of castor bean roughness, namely: whole, peeled, coarse and fine. Where the results obtained from the research that has been carried out are whole castor beans with a flame for 93 minutes and a temperature of 314.7 °C, peeled to produce a flame for 85 minutes and a temperature of 433.3 °C, coarsely crushed to produce a flame for 73 minutes and a temperature of 498.8 °C, and finely crushed to produce a flame of 65 minutes and a temperature of 519 °C. So it can be concluded from the data produced, the larger the size of the castor bean, the more time the fire is and the finer the roughness of the castor bean fence, the higher the resulting temperature.
Co-Authors Ahmad Junaidi Ali Medi Andika Nopriansyah Mila Baiti Hidayati Dwi Arnoldi Rayel Prialdo Syamsul Rizal Tri Widagdo