Editors and press        Scope        Editorial staff        Contact        Instructions for authors        Abstract databases        AMS online      Year 2013      Year 2012      Year 2011      Year 2010      Year 2009      Year 2008 1 2 3      Year 2007      Year 2006      Year 2005      Year 2004      Year 2003      Year 2002      Year 2001      Year 2000      Year 1999      Year 1998      Year 1997                Conferences        Linksd                 Visits: 86054962 AMS now reading: 1 search: by author by theme by key word Year 2008 No 3 Fujda M., Kvačkaj T., Vojtko M., Milkovič O. MECHANICAL PROPERTIES AND FRACTURE SURFACE MORPHOLOGY OF EN AW 2024 ALUMINIUM ALLOY PREPARED BY ECAP Keywords: EN AW 2024 aluminium alloy|equal channel angular pressing (ECAP)|ultra-fine grain microstructure|mechanical properties|fracture morphology| No 3 (2008), p. 331-341   mag01.pdf (382 kB) mag01_eng.txt (2 kB)   Bidulská J., Kočiško R., Kvačkaj, T., Bidulský R., Actis Grande M. NUMERICAL SIMULATIONS OF EN AW 2014 ALUMINIUM ALLOY IN ECAP PROCESS Abstract The finite element method (FEM) is a proven and reliable technique for analyzing various forming processes, including a progressive technique like Equal Channel Angular Pressing (ECAP). ECAP is one of the severe plastic deformation (SPD) techniques, which is rather effective for producing ultrafine-grained (UFG) metals with enhanced mechanical and processing properties inherent in various ultrafine-grained materials. The plastic deformation behaviour of the materials during the ECAP process with a round die corner angle (90°) and a frictionless condition was investigated using a program DEFORM 2D (it is a FEM based process simulation system). The aluminium alloy EN AW 2014 was used as the workpiece material; the stress-strain relationship were derived both from experimental investigation and from DEFORM 2D database. The main aim of the present work was provided information concerning the distribution of effective strain, strain rates and temperatures in the aluminium alloy EN AW 2014. The simulation analyses of ECAP process of aluminium alloy EN AW 2014 by means of the DEFORM 2D shows that in term of prediction individual parameters during forming processing was in the some case (strain rate intensity and temperature) sensible different, providing that material characteristic were given by database or on the basis experimentally determined stress-strain curve. In this regard, is necessary to consider in the simulation process to appear from knowledge of material characteristic obtained by laboratory test of formability. Keywords: aluminium alloy|SPD|ECAP|FEM|DEFORM| No 3 (2008), p. 342-348   mag02.pdf (370 kB) mag02_eng.txt (2 kB)   Bidulský R., Actis Grande M., Kabátová M., Selecká M. THE EFFECT OF CARBON COATING AND CARBON ADMIXING ON THE COMPRESSIBILITY OF ASTALOY CrL Keywords: compaction|compressibility|linear regression|density|porosity| No 3 (2008), p. 349-355   mag03.pdf (278 kB) mag03_eng.txt (1 kB)   Plešingerová B., Lukáčová H., Horkavcová D., Vojtko M. CRYSTALLIZATION OF CALCIUM PHOSPHATES ON ALKALI-TREATED Ti–SUBSTRATE Keywords: Precalcification|SCS an SBF Fluids|Activation of Titanium| No 3 (2008), p. 356-370   mag04.pdf (2 MB) mag04_eng.txt (1 kB)   Dutkiewicz J., Kováčová A., Maziarz M., Litynska L. MICROSTRUCTURE ANALYSE AND MICROHARDNESS MEASUREMENTS OF BULK METALLIC GLASSES AND THEIR COMPOSITES Keywords: amorphous metals|metallic glasses|Ni-based alloys|mechanical alloying|hot vacuum pressing|porosity|microhardness| No 3 (2008), p. 371-380   mag05.pdf (466 kB) mag05_eng.txt (2 kB)   Lascsáková M. THE INFLUENCE OF USING THE DIFFERENT NUMERICAL METHODS TO FORECAST THE ALUMINIUM PRICES BY MEANS OF TWO INITIAL VALUES Keywords: forecasting|numerical modelling|ordinary differential equation| No 3 (2008), p. 381-389   mag06.pdf (107 kB) mag06_eng.txt (3 kB)   Straka Ľ. ANALYSIS OF HEATED AFFECTED SAMPLE SURFACE AFTER WEDM PROCESS Keywords: Parameters of Technological Process|Heat Affected Zone (HAZ)|Quality of Surface|Wire Electrical Discharge Machining (WEDM)| No 3 (2008), p. 390-396   mag07.pdf (357 kB) mag07_eng.txt (2 kB)   Petrík J., Mikloš V., Tompoš T, Jakub M. THE EVALUATION OF THE HARDNESS TESTER CALIBTATION QUALITY Keywords: Vickers hardness test|calibration|uncertainty| No 3 (2008), p. 405-413   mag09.pdf (109 kB) mag09_eng.txt (555 B)   Ivanišin P., Hirjak M. BLAST FURNACE SLAG, PROCESSING AND UTILIZATION Keywords: blast furnace slag|processing of slag|granulated blast furnace slag|blast furnace gravel and blast furnace pumice|utilization of blast furnace slag| No 3 (2008), p. 414-418   mag10.pdf (44 kB) mag10_eng.txt (2 kB)   ... © 2005 AMS HF TU Košice ALL RIGHTS RESERVED ...