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All Journal Mekanika: Majalah Ilmiah Mekanika Jurnal Sains dan Teknologi
Fanani, Elvira Wahyu Arum
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary

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Studi Eksperimental Pengaruh Variasi Parameter Perlakuan Panas terhadap Kekerasan Baja Tulangan Polos BJTP280 Imam Rudi Sugara; Hardiyanto, Dwi Wahyu; Ali, Faizah; Fanani, Elvira Wahyu Arum
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 5 (2025): Oktober 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i5.6485

Abstract

The construction and manufacturing industries require materials with optimal mechanical properties, particularly hardness and toughness. BJTP280 structural steel, classified as low-carbon steel, has the potential to enhance its mechanical properties through heat treatment. This study aims to analyze the effect of variations in austenitizing temperature, holding time, and cooling medium on the hardness and microstructure of the steel. Specimens measuring 10 × 8 mm were heated at temperatures of 750°C, 800°C, and 850°C with holding times of 60, 90, and 120 minutes, followed by cooling in air, oil, and water. Hardness tests were conducted using the Brinell method, while the microstructure was observed with an optical microscope. The results showed that the cooling medium had a significant effect. The highest hardness values were obtained with water quenching at 178 HB, oil quenching at 174 HB, and air cooling at 144 HB. Hardness tended to decrease with increasing holding time due to austenite grain growth. An austenitizing temperature of 800°C produced the optimum condition with the highest hardness value, while 850°C resulted in lower hardness because of excessively coarse grain structures. In conclusion, the best heat treatment was achieved at 800°C, water quenching, and a holding time of 60 minutes.
Effect of Alkaline Treatment and Fumigation on the Mechanical Properties of Fiber Unsaturated Polyester-Cantula Composite with Compression Molding Method Salim, Muhamad Saifuddin; Ramadhan, M. Rafidya Bintang; Fanani, Elvira Wahyu Arum; Ariawan, Dody; Surojo, Eko
Mekanika: Majalah Ilmiah Mekanika Vol 21, No 2 (2022): MEKANIKA: Majalah Ilmiah Mekanika
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mekanika.v21i2.51493

Abstract

This research examines the strength of the Unsaturated Polyester Resins (UPRs)-Cantala composite with the addition of filler Microcrystalline Cellulose (MCC). Composites were created with a Volume Fraction (VF) of 30% and a 45° angle. This angle variation received the same treatment as the others, including untreated, alkaline, and fumigation. The treatment time for alkali treatment was six hours, while the treatment time for fumigation was 10 hours. The strength of each angle variation was determined, as well as its treatment of tensile strength, modulus of elasticity, and Poisson ratio UPRs-Cantala composites. According to the results, the alkali treatment produced the highest tensile strength and modulus of elasticity values. The highest Poisson ratio value was discovered without treatment at a 45°. The alkaline treatment yielded the highest tensile strength and modulus of elasticity test results. The pullout fiber fracture dominated the untreated composite fracture, whereas the fiber breakage fracture dominated the alkaline treatment.
Co-Authors Ali, Faizah Dody Ariawan Eko Surojo Hardiyanto, Dwi Wahyu Imam Rudi Sugara Ramadhan, M. Rafidya Bintang Salim, Muhamad Saifuddin