Austempering is two steps heat treatment process that, when applied to ductile iron, produces components that have properties superior to those processed by conventional treatment. Depending to chosen heat treatment parameters different final properties of the casting are obtained. In this paper heat treatment parameters for producti...

By Hasan Avdušinović, Almaida Gigović-Gekić

Cu-alloys have been intensively studied because of their high thermal conductivity, good electrical and shape memory properties and low cost. Cu-Al-Mn alloys show a higher ductility and elongation in relation to the other Cu-based alloys, as well as a good potential for a cold drawing. Therefore, the investigation of these alloys is ...

By Tamara Holjevac-Grgurić, Dragan Manasijević, Dragana Živković, Ljubiša Balanović, Stjepan Kožuh, Robert Pezer, Ivana Ivanić, Ivan Anžel, Borut Kosec, Ladislav Vrsalović, Mirko Gojić

Based on microscopic (exciton) theory of optical properties of symmetrically perturbed ultrathin molecular films, the absorption, reflection and transparency indices were formulated and presented in the function of frequencies of external electromagnetic field in near IR region. It has been showed that all optical properties depend o...

By Siniša Vučenović, Dragana Rodić, Jovan P. Šetrajčić

Polymer bonded Nd-Fe-B magnets belong to the group of functional composite materials, which consist mainly of two components: a polymer binder (PPS, PA) and magnetic particles of Nd-Fe-B alloy. The appropriate amounts of polymer binder, magnetic powder and additives are compounded by the twin screw extruder into a compound, that can ...

By Mihael Brunčko, Peter Kirbiš, Ivan Anžel

The paper presents investigation of the influence of water to cement ratio, w/c, to speed the corrosion of concrete and reinforcing steel in concrete caused by salts of magnesium. The samples were preparatory varying w/c (0,5 and 0,7). The test samples were treated nine months in the following solutions: 5% MgCl2, 5% MgSO4, 5% MgCl2 ...

By Farzet Bikić, Dejana Brkić

Research focus of this paper are stresses in concrete, reinforcement and tendons, cracks and deflections of the prestressed girders of “Type A” in order to optimize the span of such girder for the same amount of tendons and reinforcing steel. Serviceability Limit State (SLS) is a condition in which construction ceases to ...

By Husein Okugić, Sanin Džidić

Parameters which define environment conditions are largely qualified with influence of the Kostolac A and Kostolac B energy plants and surface mining of lignite. The air quality is examined continuously by measuring total deposited matter and the emissions of gases such as CO2, SO2, NOx, CO, O3. It is found that pollution substances significantly e...

By Steva K. Jaćimovski, Slobodan Miladinović, Jovan P. Šetrajčić, Siniša M. Vučenović

The increase in energy prices in the world, then the realization of less dependence on energy imports, and in particular meeting the hierarchical concept of waste management as it is in the EU, including reducing emissions of greenhouse gases (GHG Greenhouse Gases) in accordance with the Framework Convention of the United Nations Convention on clim...

By Mahmut Jukić, Ifet Šišić

Because of the oil shortage and the growing increasing environmental burdens-emission from motor vehicles, the idea of the biofuels application has been actualized. The European Union directive 2003/30/EC obliged Member States that until 31 December 2005, they must provide at least 2% share of biofuels and other renewable fuels in the total amount ...

By Šefkija Botonjić, Ilhan Bušatlić, Azra Halilović, Adnan Muratović

Water that is commonly used for drinking is groundwater, that appears on the surface of the Earth's crust as sources of different types and capacities, and in most cases that water is chemical, physical and bacteriological acceptable and suitable for use. In some cases, there is some blurring of water, that is the result of heavy rainfall or some h...

By Šefkija Botonjić, Ilhan Bušatlić, Azra Halilović, Almin Oruč