Because of their properties, superalloys are primarily used for the production of structural parts whose operating conditions correspond to elevated temperatures and often extremely aggressive environments. Because of that, they require a combination of high strength, good fatigue and creep resistance, and good corrosion resistance. Nimonic 80A is ...

By Raza Sunulahpašić, Mustafa Hadžalić

More recently modified stainless steels have been used to produce various structural elements that work in complex operating conditions. Stainless steel X8CrNiS18-9 (standard EN 10088-3: 2005) is the most commonly used austenitic stainless steel due to its good machinability. This steel has high mechanical and working properties than...

By Derviš Mujagić, Aida Imamović, Mustafa Hadžalić

The paper describes the determination of the mechanical properties of the spherical floors of pressure vessels, obtained by the welding process and shaped by the process of gradual local deformation in the cold state, i.e. by the process of Incremental sheet forming (ISF). Spherical cylindrical bottoms are an integral part of most cl...

By Mustafa Hadžalić, Raza Sunulahpašić, Zlatan Ištvanić

The basic characteristics of the chemical composition of steel with improved machinability (X8CrNiS18-9) are the increased content of sulphur (0.15-0.45%), phosphorus (0.07-0.11%) and manganese (0.5-1.5%). Sulphur by creating sulphide inclusions reduces friction and cutting resistance, and increases the brittleness of the chip.Considering its harmf...

By Derviš Mujagić, Aida Imamović, Mustafa Hadžalić

Mine development imposes very high technical requirements of the mine hoisting equipment in terms of speed of transport. To meet these requirements it is necessary to properly design the structural elements of mine hoisting equipment which means that they must have the proper characteristics of the materials from which they are made such as mechani...

By Mustafa Hadžalić, Mirsada Oruč, Raza Sunulahpašić

Particle size distribution measurements were performed on ground granulated blastfurnace slag by laser diffraction with the powder dispersed in distilled water with sodium hexametaphosphate used as dispersing agent, as well as in pure distilled water and propan-2-ol. Two samples of slag with Blaine fineness 4700 cm2 /g and5500 cm2 /g were tested.Th...

By Adnan Mujkanovic, Marina Jovanović, Amel Zahirović, Mustafa Hadžalić, Nevzet Merdić

Stainless steel plays an important role in all emerging technologies. Detrimental effects of inclusions in steel do not only depend on their sizes, shape, distribution, but also on their chemical composition and mechanical properties. For this reason, the control of formation of non metallic inclusions and the characterization presen...

By Derviš Mujagić, Aida Mahmutovic, Mustafa Hadžalić, Amna Karić

The austenitization is first operation at most operations of heat treatment, and it is implied heating steel on the austenitizing temperature and holding at this temperature while are not achieved completely transformation origin microstructure in austenite. Two base parameters which implicate at effect of austenitization are austeni...

By Armina Bašić, Almaida Gigović-Gekić, Hasan Avdušinović, Mustafa Hadžalić