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Year 2012 No 2

E. Hryha, L. Nyborg
PROCESS CONTROL SYSTEM FOR DELUBRICATION OF PM STEELS
Abstract
Lubricants are important additive in powder metallurgy (PM) steels as they are needed to improve powder compressibility and reduce tool wear. Removal of the lubricant results in production of number of gas species that can have harmful effect on the base material. Current paper describes process gas monitoring system for delubrication control that is built on industrially available gas sensors. Experimental results indicate that accurate delubrication process control can be performed by utilizing only CO2 and O2 sensors. It is recommended to perform delubrication below 500°C in dry inert atmospheres in the case of modern ethylene bis stearamide based lubricants.

Keywords: powder metallurgy|prealloyed powder|delubrication process|
No 2 (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 2 (2012), p. 69-75
  mag14.pdf (1 MB)
mag14_eng.txt (877 B)  

M. Besterci, O. Velgosová, J. Ivan, T. Kvačkaj, P. Kulu
FRACTURE MECHANISM OF DISPERSION-STRENGTHENED Cu-Al2O3 NANOSYSTEM
Keywords: dispersion strengthened Cu-Al2O3 composite|mechanical alloying|fracture mechanism|
No 2 (2012), p. 76-81
  mag12.pdf (226 kB)
mag12_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 2 (2012), p. 82-91
  mag04.pdf (381 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 2 (2012), p. 92-99
  mag13.pdf (270 kB)
mag13_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 2 (2012), p. 100-108
  mag06.pdf (423 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|Shewhartcontrol|
No 2 (2012), p. 109-116
  mag07.pdf (512 kB)
mag07_eng.txt (864 B)  

M. Šlais, I. Dohnal, M. Forejt
DETERMINATION OF JOHNSON-COOK EQUATION PARAMETERS
Keywords: finite element modeling|constitutive equations|titanium alloys|
No 2 (2012), p. 125-132
  mag10.pdf (438 kB)
mag10_eng.txt (677 B)  

A. Kalendová, M. Kantorová
ANTICORROSION PEROVSKITE PIGMENT BASED ON STRONTIUM TITANATE
Keywords: perovskite|strontium titanate|coating|anticorrosive|pigment|anatase|
No 2 (2012), p. 117-124
  mag09.pdf (334 kB)
mag09_eng.txt (764 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 2 (2012), p. 133-142
  mag11.pdf (738 kB)
mag11_eng.txt (1 kB)