Steels for rolling bearings are important in the world production of special steels. They are used for the production of rolling bodies and rings. Since these are very responsible parts in machine construction, high-quality standards are required for these steels. The service life of rolling bearings, in addition to working conditions also depends ...

By Almaida Gigovic-Gekic, Diana Ćubela, Hasan Avdusinovic, Amer Karic, Branka Muminovic

This paper investigates the effects of oil quenching and tempering at various temperatures on the mechanical and structural properties of X155CrVMo12-1 tool steel. The steel specimens were austenitized at 1030 °C for half an hour, followed by quenching and tempering at different temperatures. Mechanical properties were assessed by measuring the...

By Uroš Stamenković, Ivana Marković, Srba Mladenović, Dragan Manasijević, Petar Milanović, Milan Nedeljković

This study evaluates three hybrid electrocoagulation (EC) processes with aluminium electrodes: EC-zeolite process (EC+Z), EC-zeolite-ultrasound-assisted process (EC+Z+US), and EC-zeolite-magnet-assisted process (EC+Z+MAG) for compost wastewater treatment with large content of organic matter. The focus was on evaluating the effects of these processe...

By Nediljka Vukojević Medvidović, Ladislav Vrsalović, Sandra Svilović, Senka Gudić, Ivona Čule

NdFeB (Neodymium-Iron-Boron) magnets are essential for technologies such as electric vehicles, wind turbines, and medical devices due to their high energy density. However, the growing demand for these magnets, coupled with the limited availability of rare earth elements (REEs), emphasizes the need for efficient recycling of end-of-life (EOL) NdFeB...

By Anıl Umut Özdemir, Umay Çınarlı Yavaş, Taner Akbay, Ahmet Turan

Public demand for environmentally friendly solutions for new types of cement with reduced CO₂ emissions is increasing. Consequently, new types of cement must be developed and introduced to the market. This paper presents test results for cement formulations based on calcium fly ash and marly limestone, following the EN 197-5 standard. The clinker c...

By Nevzet Merdić, Nedžad Haračić, Ilhan Bušatlić, Nadira Bušatlić, Adnan Mujkanović, Nedžib Kobilica

Measuring the material's microhardness is generally easy and quick. However, since the operator reads the dimensions, i.e., the ends of the imprint formed in the material, the measurement result is greatly influenced by the operator's assessment. We present the research results in which three operators measured Vickers microhardness on the same imp...

By Melisa Baždar, Amra Salčinović Fetić, Belma Husković, Ajla Karić

The paper presents an examination of the possibility of applying  wild raspberry fruit  extract as a green inhibitor of general corrosion of brass in 3% NaCl. Wild raspberry fruits were collected from the Moševac near Maglaj city, Bosnia and Herzegovina. Wild raspberry fruit extract  was obtained by ultrasonic method. By UV/VI...

By Dejana Kasapović, Farzet Bikić, Sadber Kasapović, Emina Boškailo

The most abundant renewable biomass on the earth is lignocellulosic biomass supplying from the forestry, forestry residue, and agricultural wastes nearly annually 200 billion tones worldwide. Agricultural wastes encompass a lot of cellulose, lignin and hemicellulose in composite form. Cellulose, the most important part of a plant structure, is a re...

By Ayşenaz Onar, Zahra R. Navazi, Nebahat Aral Yılmaz

Fine alumina trihydrate (ATH) is the primary filler of environmentally acceptable flame retardants, artificial agate, and other products, in addition to being the raw material for alumina-based ceramics and catalyst carriers. This study aims to investigate the fine aluminum trihydrate precipitation process from sodium aluminate Bayer leach liquor b...

By Sıla Meva Elitaş, Batuhan Dikici, Ali Ergüzeloğlu, Bayram Güneş, Hatice Kubra AKBEN

Cefazolin sorption on oxycellulose was performed to obtain bioactive material which, as drug carriers, has a possibility of prolonged release and local application. Oxycellulose with different content COOH groups was obtained by selective oxidation. The bonding was performed in an antibiotic water solution concentration of c=3,4∙10-3 molL-1, while ...

By Pero S. Sailović, Borislav N. Malinović, Darko R. Bodroža