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

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

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

This paper studies the effect of annealing on the microstructure and hardness, microhardness and electrical conductivity changes of cold deformed (ε=40%) sintered pure copper and Cu-4at.% Au alloy. The samples of pure copper and Cu-4at.%Au alloy were obtained by sintering, followed by prefinal rolling, quenching and final rolling with 40% r...

By Ivana Marković, Svetlana Nestorović, Desimir Marković, Dragana Živković

In this work we studied the response of newly developed armored steel plates PROTAC 500 to the ballistic testing with armored piercing bullets with a core of tungsten carbide, charge 7.62 mm. Interactions between the bullets and the steel plate was investigated by standard metallographic and mechanical testing methods. We were interested in the geo...

By Jure Bernetič, Gorazd Kosec, Slavko Ažman, Matjaž Marčetič, Boštjan Podlipec, Borut Kosec, Aleš Nagode, Ladislav Kosec, Mirko Gojić, Milenko Rimac, Omer Beganović, Zijah Burzić, Franc Vodopivec, Iztok Tomažič

The impact of chemical corrosion on the durability of tundish working lining based on slurry mix is discussed in this work. The results of chemical and mineralogical analysis in the sample of tundish working layer after lining lifetime are presented. Infiltration of slag effected in a reduced thermal shock resistance resulting in thermal stress on ...

By Aida Mahmutović, Omer Kablar, Šaban Žuna

In the process of production of iron and steel substantial amounts of fuel and raw materials are consumed. Metallurgical coke as fuel, reducing agent and material that provide gas flow trough blast furnace processes must possess certain properties in terms of strength, due to expected changes in the conditions of high temperature environment. Deman...

By Sulejman Muhamedagić, Hasan Avdušinović