1. Weldability prediction of high strength steel S960QL after weld thermal cycle simulationMarko Dunđer, Tomaž Vuherer, Ivan Samardžić, 2014, original scientific article Abstract: This paper presents weld thermal cycle simulation of high strength steel S960QL, and describes influence of cooling time t8/5 on hardness and impact toughness of weld thermal cycle simulated specimens. Furthermore, it presents analysis of characteristic fractions done by electron scanning microscope which can contribute to determination of welding parameters for S960QL steel.
Keywords: high strength steels, S960QL steel, weldability, weld thermal cycle simulation, hardness, toughness
Published in DKUM: 03.07.2017; Views: 2986; Downloads: 167
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2. Weldability of microalloyed high strength steels TStE 420 and S960QLMarko Dunđer, Tomaž Vuherer, Ivan Samardžić, 2014, original scientific article Abstract: The paper presents research of weldability of microalloyed high strength steels TStE 420 and S960QL after weld thermal cycle simulation. Beside mechanical properties hardness and impact strength, the microstructures of characteristic weld thermal cycled structures for both steels are given. The results will contribure to determination of weakest points in Heat Affected Zone of both steels.
Keywords: weldabilty, high strength steels, mechanical properties, TStE 420, S960QL
Published in DKUM: 03.07.2017; Views: 2600; Downloads: 158
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6. Microstructural investigation of the heat-affected zone of simulated welded joint of P91 steelTomaž Vuherer, Marko Dunđer, Ljubica Milović, Milorad Zrilić, Ivan Samardžić, 2013, original scientific article Abstract: In the process of testing real components exposed to elevated temperature, it is not possible to neglect cracks. The most significant cracks can be induced by welding, which is applied for joining of structural components. Pressure equipment in service is also exposed to high pressure and high stresses. Materials for their manufacturing are designed to resist high stressat elevated temperature, and to meet requirements regarding creep resistance. The objective of this study is to investigate microstructure of different regions of the heat affected zone in T/P91 steels by using thermal simulation instead of welding.
Keywords: welded joints, microstructures, P91 steel, heat-affected zone, heat treatment
Published in DKUM: 10.07.2015; Views: 1302; Downloads: 180
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7. Weldability investigation of TStE 420 after weld thermal cycle simulationMarko Dunđer, Tomaž Vuherer, Ivica Kladarić, 2010, original scientific article Abstract: The paper presents a short description and overview of the weld thermal cycle simulation methods. An experimental investigation on the weld cycle simulated specimens is predicted by a plan of experiment using single cycle simulation. The obtained hardness results are compared with double cycle simulated specimens results of individual points in the heat-affected zone. Beside that, the characteristic microstructures of points in the heat-affected zone after a single weld thermal cycle simulation are given. A thermal simulation method is suitable for different weldability examinations. In this paper, the authors would like to investigate the maximal hardness of individual points in the weld joint what is important when considering cold cracking sensitivity.
Keywords: HSLA steels, weldability, weld thermal cycle simulation, hardness
Published in DKUM: 31.05.2012; Views: 1680; Downloads: 37
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