KAB steels are a newly developed grade of advanced ultra high strength steels, which distinguish themselves by the rapid formation of fine nanostructured carbide free lower bainite. The term nanostructured is used with respect to the thickness of the individual bainitic ferrite plates which can vary between 50 nm to as fine as a few ...

By Peter Kirbiš, Mihael Brunčko, Ivan Anžel

Shape memory alloys (SMAs) are advanced functional materials suitable for technical applications. Among them Cu-Al-Mn alloy is a promising candidate for industry applications (mechanical engineering, electro-engineering etc.) due to their ductility. In this work analysis of the Cu-Al-Mn alloy after smelting and casting in the laborat...

By Mirko Gojić, Stjepan Kožuh, Ivana Ivanić, Tamara Holjevac-Grgurić, Robert Pezer, Ivan Anžel, Borut Kosec, Milan Bizjak, Ladislav Vrsalović, Dragana Živković

Phase diagram of the Al-Sn-Ga ternary system was calculated using optimized thermodynamic parameters for binary sub-systems based on CALPHAD method. Four vertical sections were calculated: Ga0.5Sn0.5-Al, Al0.5Sn0.5-Ga, Al0.5Ga0.5-Sn, and Al0.9GaSn0.1-Ga. Calculated liquidus projection of the Al-Sn-Ga ternary system and isothermal sec...

By Ljubiša Balanović, Dragana Živković, Dragan Manasijević, Jožef Medved, Maja Vončina

This article talks about the possibility of production of portland-composite cement in cement plant Kakanj in accordance with the requirements of EN 197-1. By that standard cement class 52,5N must have a compressive strenght greater or equal 20MPa after 2 days, and after 28 days greater or equal 52,5MPa. Portland-composite cement is ...

By Nevzet Merdić, Ilhan Bušatlić, Nedžad Haračić, Nadira Bušatlić

The main objective was to reduce: the time of the bus stops, the time for administrative actions of drivers, fuel consumption, air pollution emissions of SO2 and increase the solvency of the company. For the realization of the objectives set was needed: to introduce electronic billing system with the use of contactless - chip cards. All vehicles ar...

By Jusuf Borić

The most used and established method for detecting the effects of the product on the environment is a life cycle assessment (LCA) method. LCA analyzes the effects of the product on the environment in its all five life stages: design, materials selection, manufacture, use, and ultimately its removal. At the same time LCA is an important tool wh...

By Borut Kosec, Blaž Karpe, Dragan Gogić, Aleš Nagode, Igor Budak, Milana Ilić, Gorazd Kosec, Zorana Tanasić, Goran Janjić, Mirko Soković

Steels for screws, nuts and rivets are usually low carbon steels, carbon steels or quenched and tempered low alloy steels. From these are required precisely defined strength properties, hardness and toughness, which determine the so called class strength of screws. This paper describes the thermal treatment of hexagonal screws with s...

By Jusuf Duraković, Mirsada Oruč, Sulejman Muhamedagić, Raza Sunulahpašić, Almaida Gigović-Gekić

Application of the new materials in the automotive industry is a challenge that is placed in front of researchers of our times. The challenge is reflected in the modification of the chemical composition of steel and heat treatment in order to achieve improved mechanical properties. Steel 17-7PH is austenitic - martensitic steel with ...

By Belma Fakić, Diana Ćubela, Mihyar Noureldin Mahmoud

A coal dust is added to brick clay mainly to save energy and increase porosity. This paper examines the influence of coal from Coal mine "Kakanj", in the amount of 10% and 20%, on some physical and technological properties of brick clay "Rapajlo". The impact of coal on the plasticity of clay, and the characteristics of dried and fired samples was i...

By Marina Jovanović, Adnan Mujkanovic, Mirsada Rizvanovic, Merima Brkić

Some laboratory enquire has been made on relating correlation main physical-mechanical characteristics of prepared leather where in producing process use mineral as well as herbal tans. It’s well known that use of herbal tans in producing leather has justification in aspect of environment protection issues and health protection. Experimental ...

By Šefkija Botonjić, Merima Haseljić