A gas-gun technique to radially expand cylinders of a chosen material, based on a technique developed in 1979, has recently been re-established. Stainless steel 304 cylinders of length 160 mm, internal diameter 67 mm and thickness either 0.5 or 1.5 mm have been expanded using a 70 mm bore single-stage gas-gun. Microstructural analysis of the recovered specimens was performed using optical micro...

The structure, magnetic and electrical properties of low-carbon 2% Mn-doped steel manufactured by selective laser melting (3D-steel) casting have been investigated. It was found that after normalization at 980 o C for 30 minutes, 3D-steel becomes structurally similar to cast steel, while the hardness decreases 70% compared annealed 3D-steel. Surface stresses are maximum in as-build three-hour a...

S. Bulatović, Yugoslav River Shipping, Serbia, Lj. Milović, University of Belgrade, Faculty of Technology and Metallurgy, Serbia, A. Sedmak, University of Belgrade, Faculty of Mechanical Engineering, Serbia, I. Samardžić, University of Osijek, Mechanical Engineering Faculty, Slavonski Brod, Croatia Low cycle fatigue test was performed in ambient atmosphere at room temperature. Cycle loading of ...

This paper deals with the possibility of reducing carbon content by heat treatment in reactive atmospheres in order to improve plastic deformations properties of steel sheets. The heat treatment involves a decarburation annealing after a cold rolling, as opposed to the traditional process that performs the heat treatment in non-reactive atmospheres. Some of the most relevant variables were stud...

Az 1953-ban útjára indult, immáron hetvenéves Belügyi Szemle tudományos folyóirat jubileumi „70 év, 70 gondolat” című kiadványában megjelent tanulmány olvasható a felkért szerzőktől.

The fibrogenic potential of 11 different welding fumes and metallic aerosols, considered to be reference standard surrogates for the commonly used welding technologies and applications responsible for 70% of welders exposure, is screened by using the rat peritoneal macrophage (RPM) in vitro bioassay. Only one class of fumes, that from the manual metal are welding of stainless steel, shows disti...

This paper studies the feasibility of calculating strains in aged F114 steel specimens with Fiber Bragg Grating (FBG) sensors and infrared thermography (IT) techniques. Two specimens have been conditioned under extreme temperature and relative humidity conditions making comparative tests of stress before and after aging using different adhesives. Moreover, a comparison has been made with IT tec...

S. Bulatović, Yugoslav River Shipping, Serbia, Z. Burzić, Military Technical Institute, Serbia, V. Aleksić, Institute for Testing Materials, Serbia, A. Sedmak, University of Belgrade, Faculty of Mechanical Engineering, Serbia, Lj. Milović, University of Belgrade, Faculty of Technology and Metallurgy, Serbia High strength low-alloy steel under low cycle fatigue at a certain level of strain contr...

Two new types of air rifle pellet have been introduced; Prometheus, made from steel and nylon, and 'Sabo', made from lead alloy and plastic. Both have radio-opaque and radio-lucent components and their manufacturers claim better penetration. To establish their capabilities and the clinical implications a comparison of penetration was made between diablo, Prometheus and 'Sabo' pellets using gela...