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Št. zadetkov: 9
The influence of buffer layer on the properties of surface welded joint of high-carbon steel
Olivera Popović, Radica Prokić-Cvetković, Aleksandar Sedmak, Galip Buyukyildrim, Aleksandar Bukvić
Izvirni znanstveni članek
Oznake: varjenje površine;vmesna plast;zvar;žilavost;parametri rasti razpoke;
Leto: 2011 Vir: dLib.si Digitalna knjižnica Slovenije
Distortion of the substructure of a 20-ft shipping container exposed to zinc hot-dip galvanizing
Ivana Ivanović, Aleksandar Sedmak, Rebeka Rudolf, Leo Gusel, Biljana Grujić
Izvirni znanstveni članek
Oznake: shipping container;structural steel;zinc hot-dip galvanizing;transient heat transfer;distortion;
Glavni namen te študije je bila izdelava modela za numerično simulacijo vročega potopnega cinkanja 20 ft ISO transportnega kontejnerja. Zato smo analizirali osnovni termomehanski problem jeklene konstrukcije zaradi vpliva toplote med vročim potopnim cinkanjem. Numerični izračuni so bili izvršeni za ...
Leto: 2013 Vir: Fakulteta za strojništvo (UM FS)
Numerical analysis of constraint effect on ductile tearing in strength mismatched welded CCT specimens using micromechanical approach
Bashir Younise, M. Rakin, Bojan Medjo, Nenad Gubeljak, Dražan Kozak, Aleksandar Sedmak
Izvirni znanstveni članek
Oznake: constraint effect;ductile fracture;finite element analysis;material mismatching;stress triaxiality;transferability;
In this paper, constraint effect on ductile fracture initiation and propagation has been studied. Three-dimensional finite element analyses of mismatched welded joints made of high strength steel, have been performed for centre-cracked tensile (CCT) specimens. Different weld widths and material mism ...
Leto: 2011 Vir: Fakulteta za strojništvo (UM FS)
Micromechanical analysis of constraint effect on fracture initiation in strength mis-matched welded joints
Miloš Dobrojević, Marko Rakin, Nenad Gubeljak, I. Cvijović, M. Zrilić, N. Krunich, Aleksandar Sedmak
Izvirni znanstveni članek
Oznake: lomna mehanika;duktilni lom;visokotrdnostna nizko legirana jekla;razpoke;nekovinski vključki;rast praznin;mikromehanski model;trdnostno neenaki zvarni spoji;fracture mechanics;ductile fracture;high strength low alloyed steel;cracks;micromechanical model;mismatched welded joints;constraint effect;void growth;
In this paper the micromechanical approach to ductile fracture was applied in a study of constraint effect crack growth initiation in mismatched welded joints. The single edged- notched bend specimens (precrack length ▫$a_o/W=0.32$▫) were experimentally and numerically analysed. The coupled micromec ...
Leto: 2007 Vir: Fakulteta za strojništvo (UM FS)
Superplastic deformation of an X7093 Al alloy
Srdjan Tadić, Aleksandar Sedmak, Radica Prokić-Cvetković, Abdsalam Eramah, Rebeka Rudolf
Izvirni znanstveni članek
Oznake: superplasticity;Al alloys;deformation mechanisms;
We have investigated the superplastic deformation mechanism of a powder-metallurgy, high-zinc X7093 Al alloy. The objective was to examine the rate-controlling mechanisms that govern its superplastic deformation. The investigations were carried out in the temperature range 490–524 °C and strain rate ...
Leto: 2014 Vir: Fakulteta za strojništvo (UM FS)
Numerical analysis of temperature field during hardfacing process and comparison with experimental results
Vukić Lazić, Ivana Ivanović, Aleksandar Sedmak, Rebeka Rudolf, Mirjana Lazić, Zoran Radaković
Izvirni znanstveni članek
Oznake: varjenje;simulacije;numerična analiza;termična analiza;toplotna prevodnost;welding simulations;numerical analysis;thermal analysis;simulations;transient heat conduction;moving heat source;
The three-dimensional transient nonlinear thermal analysis of the hard facing process is performed by using the finite element method. The simulations were executed on the open source Salome platform using the open source finite element solver Code Aster. The Gaussian double ellipsoid was selected i ...
Leto: 2013 Vir: Fakulteta za strojništvo (UM FS)
Friction-stir welding of high-strength aluminium alloys and a numerical simulation of the plunge stage
Milenko A. Perović, Darko Veljić, Marko Rakin, Nenad Radović, Aleksandar Sedmak, Nikola Bajic
Izvirni znanstveni članek
Oznake: friction-stir welding;welding parameters;metallography;mechanical test;numerical simulation;plinge stage;temperature;force;
This paper defines a set of welding parameters for the Friction-Stir Welding (FSW) of two forged panels of the alloy EN AW 7049A in a T652 temper and discusses the plunge stage of FSW using numerical modeling. This multi-component aluminum alloy is characterized by high strength, reduced plasticity ...
Leto: 2012 Vir: dLib.si Digitalna knjižnica Slovenije
Characterisation of high-carbon steel surface welded layer
Olivera Popović, Radica Prokić-Cvetković, Aleksandar Sedmak, Vencislav Grabulov, Zijah Burzić, Marko Rakin
Izvirni znanstveni članek
Oznake: jeklo;navarjanje;mikrostruktura;bainit;železniške proge;
Leto: 2010 Vir: dLib.si Digitalna knjižnica Slovenije
Deformation mechanisms in Ti3Al-Nb alloy at elevated temperatures
Srdjan Tadić, Radica Prokić-Cvetković, Igor Balać, Radmila Heinemann Jančić, Katarina Bojić, Aleksandar Sedmak
Izvirni znanstveni članek
Oznake: titanium intermetallics;deformation;viscous glide;power law breakdown;
Ti3Al-11Nb-1V (x/%) was made in a vacuum arc furnace. Hot-rolling was conducted at 1050 °C in a two-phase field of the alloy. Strain-rate jump tests were performed at T = 800-1100 °C and strain rates of 10-6 to 10-3 s-1. Creep stress exponent (n) and activation energy for deformation (Q) were used t ...
Leto: 2010 Vir: dLib.si Digitalna knjižnica Slovenije
Št. zadetkov: 9
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