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Year 2012 No 3

E. Hryha, L. Nyborg
PROCESS CONTROL SYSTEM FOR DELUBRICATION OF PM STEELS
Keywords: powder metallurgy|prealloyed powder|delubrication process|
No 3 (2012), p. 60-68
  mag01.pdf (352 kB)
mag01_eng.txt (685 B)  

M. Maccarini, R. Bidulský, M. Actis Grande
ANALYSIS AND ASSESSMENT OF POWDER METALLURGY TECHNIQUES FOR ARMOUR ELEMENTS PRODUCTION
Keywords: Powder metallurgy|ballistic properties|armour|failure probability|
No 3 (2012), p. 69-75
  mag02.pdf (1 MB)
mag02_eng.txt (877 B)  

M. Besterci, O. Velgosová, J. Ivan, T. Kvačkaj, P. Kulu
FRACTURE MECHANISM OF DISPERSION-STRENGTHENED Cu-Al2O3 NANOSYSTEM
Abstract
The method of “in-situ tensile test in SEM” is suitable for investigations of fracture mechanisms because it enables to observe and document deformation processes directly, thank to which the initiation and development of plastic deformation and fracture can be reliably described. The deformation and fracture mechanisms of Cu-Al2O3 nanomaterials with 5 vol. % of Al2O3 phase has been analyzed using technique of the “in-situ tensile testing in SEM”. It has been shown that the deformation process causes break-up of large Al2O3 particles and decohesion of smaller ones. The final fracture path is influenced also by boundaries of nanograins, through which the principal crack propagates towards the sample exterior surface. Based on the experimental observations a model of damage and/or fracture mechanisms has been proposed.

Keywords: dispersion strengthened Cu-Al2O3 composite|mechanical alloying|fracture mechanism|
No 3 (2012), p. 76-81
  mag03.pdf (226 kB)
mag03_eng.txt (842 B)  

K. Mroczka, A. Wójcicka, P. Kurtyka
2017A ALUMINUM ALLOY IN DIFFERENT HEAT TREATMENT CONDITIONS
Keywords: aluminum alloys|precipitation|tensile test|hardness|fracture|
No 3 (2012), p. 82-91
  mag04.pdf (632 kB)
mag04_eng.txt (650 B)  

J. Zapletal, P. Doležal, P. Gejdoš, M. Horynová
INFLUENCE OF HEAT TREATMENT ON MICROSTRUCTURE AND FATIGUE BEHAVIOR OF AZ61 MAGNESIUM ALLOY
Keywords: AZ61|magnesium alloys|solution heat treatment|low cycle fatigue|high cycle fatigue|
No 3 (2012), p. 92-99
  mag05.pdf (610 kB)
mag05_eng.txt (698 B)  

Yu.M. Azhniuk, V. Stoyka, V.V. Lopushansky, I. Petryshynets, F. Kováč, A.V. Gomonnai, D.R.T. Zahn
THERMAL DIFFUSION OF ZINC FROM ZINC-CONTAINING BOROSILICATE GLASS INTO CADMIUM CHALCOGENIDE NANOCRYSTALS
Keywords: interface diffusion|annealing|scanning electron microscopy (SEM)|energy dispersive X-ray spectroscopy (EDXS)|compound semiconductors|
No 3 (2012), p. 100-108
  mag06.pdf (657 kB)
mag06_eng.txt (682 B)  

E. Spišák, J. Majerníková
ANALYSIS OF VARIANCE OF MECHANICAL PROPERTIES OF SHEETS AS THE INPUT PARAMETERS FOR SIMULATION OF PROCESSES
Keywords: thin steel sheet|tension test|variability of mechanical properties values|strain hardening exponent|normal anisotropy coefficient|
No 3 (2012), p. 109-116
  mag07.pdf (397 kB)
mag07_eng.txt (864 B)  

A. Kalendová, M. Kantorová
ANTICORROSION PEROVSKITE PIGMENT BASED ON STRONTIUM TITANATE
Keywords: perovskite|strontium titanate|coating|anticorrosive|pigment|anatase|
No 3 (2012), p. 117-124
  mag08.pdf (476 kB)
mag08_eng.txt (764 B)  

M. Šlais, I. Dohnal, M. Forejt
DETERMINATION OF JOHNSON-COOK EQUATION PARAMETERS
Keywords: finite element modeling|constitutive equations|titanium alloys|
No 3 (2012), p. 125-132
  mag09.pdf (453 kB)
mag09_eng.txt (677 B)  

J. Spišák, M. Cehlár, V. Jacko, Z. Jurkasová, M. Pašková
TECHNICAL AND ECONOMICAL ASPECTS OF THE OPTIMISATION OF THE STEAM BOILER
Keywords: boiler|thermodynamics|boiler modelling|energy analysis|technical optimization|operational optimization|
No 3 (2012), p. 133-142
  mag10.pdf (738 kB)
mag10_eng.txt (1 kB)