The mechanical properties and microstructure of copper base shape memory alloys are relatively well known, while data on thermal properties (thermal conductivity, specific heat, and temperature conductivity) are not available. In the frame of our investigation work thermal properties of rapidly solidified Cu-Al-Ni-Mn alloy were deter...

By Borut Kosec, Blaž Karpe, Milan Bizjak, Ladislav Vrsalović, Diana Ćubela, Mirko Gojić, Ivana Ivanić, Stjepan Kožuh

In this paper, C45 medium carbon tool steel was investigated after various heat treatments. The thermal properties, specifically thermal diffusivity and thermal conductivity, were measured and also the microstructure analysis was done on a light microscope. Heat treatment of the samples included: 1) the normalization heat treatment a...

By Uroš Stamenković, Ivana Marković, Srba Mladenović, Dragan Manasijević, Ljubiša Balanović, Avram Kovačević, Milan Nedeljković, Jovana Božinović

Long-term exposure of superheater and steam intermediate superheater pipe materials to high temperatures in the operating conditions that prevail in thermal power plants leads to the appearance of the oxide layer.Oxide layer forms on the inner wall of the pipe, which acts as a heat insulator and reduces heat transfer through the pipe...

By Belma Fakić, Adisa Burić, Edib Horoz

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

In order to examine the state of critical components of the boiler of Unit 5 of Kakanj Thermal Prema wer Plant, headers were tested in order to undertake appropriate technological measures and activities on the basis of insight into the current state of affairs, and to make recommendations for further exploitation. From first commiss...

By Armin Husika, Belma Fakić, MIlenko Rimac

Steel S690 QL is a high-strength quenched and tempered, fine-grained structural steel with a minimum yield strength of ReH of 690 MPa and with guaranteed toughness (Charpy) for rolled plates with a thickness of 3 to 50 mm. This paper presents the examination and analysis of the microstructure and grain size results after quenching an...

By Mirsada Oruč, Aida Imamović, Almaida Gigovic-Gekic, Milenko Rimac

Aluminium alloy foams are a form of porous metal whose structure resembles the shape of natural materials such as coral, bone, sponge, etc. Due to their structure, these materials retain good mechanical properties of the base material while being significantly lighter than non-porous metal. Metal foams can be used as energy and vibration absorbe...

By Karla Grgić, Igor Ćulum, Branimir Lela, Jure Krolo, Sonja Jozić

We are currently witnessing the beginning of the global food crisis and disturbances in the fertilizermarket. On the other hand, on July 16, 2022, Regulation (EU) 2019/1009 of the EuropeanParliament and of the Council for laying down rules on the placing on the market of EU fertilizerproducts establishes strict rules on the safety and quality of fe...

By MIlan J. Adamović, Jasmina Kustura, Enita Kurtanović, Belma Halilhodžić, Atif Hodzić, Muhamed Harbinja, Mirjana D. Stojanović

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

This paper describes the process of degradation of the structure of the inlet header of the intermediate reheater (MPr) 2 input header at the boiler of Unit 7 of the Thermal Power Plant Kakanj, determined on the basis of tests of replicas and hardness at characteristic places of the header. Headers, with minor delays, have been in co...

By Armin Husika, Belma Fakić, Milenko Rimac