National Repository of Grey Literature 33 records found  beginprevious14 - 23next  jump to record: Search took 0.00 seconds. 
High resolution field emission scanning electron microscope JSM 6700 in ISI AS CR Brno - first experience and results with the instrument operation
Matějková, Jiřina ; Rek, Antonín
JSM6700F is an ultra high resolution FE SEM suitable for observation of fine structures such as mutilayeres film and nano particles fabricated by the nanotechnology. This JEOL microscope is at ISI ASCR Brno in experimental operation since the beginning of 2002. Its possibilities have been tested on first specimens with submicron structures.
On the redistribution of aluminium and carbon in the weld joints of steels in the temperature range 500-1100oC (1,15 wt.% Al)
Stránský, K. ; Million, Bořivoj ; Foret, R. ; Michalička, Petr ; Rek, A.
Measurements of Al, Cr, Fe, Ni, C redistribution in welded joints of unalloyed 12050+1,15Al steel and high alloyed Cr-Ni steel in temperature range 500-1100oC were realised by means of analytical complex JEOL JXA 8600/KEVEX. The C, Al, Cr, Fe, Ni diffusion coefficients were established and the relation among diffusion coefficients were discused.
THE INFLUENCE OF HIGH TEMPERATURES ON THE DIRECTION OF CARBON DIFFUSION FLUX IN STEEL WELDMENTS
Kučera, Jaroslav ; Michalička, Petr ; Million, Bořivoj ; Rek, A. ; Stránský, K.
The redistribution of carbon in steel weldments heated at temperatures situated in the range 500 °C up to 1100 °C is reported. The sandwich-like specimens used for experiments were made from the steels A .IDENT. (ČSN 17242) and K .IDENT. (P91). It was stated that at low temperatures (500-750 °C) the carbon diffusion flux is directed from the steel A into the steel K and at high temperatures from K into A.
Simultaneous diffusion of aluminium, carbon, chromium, iron and nickel in steel weldments at temperature interval 500 to 1100°C
Stránský, K. ; Million, Bořivoj ; Foret, R. ; Rek, A. ; Michalička, Petr
In this paper results of measurements of simultaneous diffusion of aluminium, carbon, chromium, iron and nickel in welded joints of unalloyed 12050+Al steel and high alloy austenitic chromium-nickel steel are presented.
On the redistribution of aluminium and carbon in a weld joints of steels in the temperature range 500-1100°C
Stránský, K. ; Million, Bořivoj ; Foret, R. ; Michalička, Petr ; Rek, A.
In this paper an original results of aluminium, chromium, iron,nickel and carbon redistribution in welded joints of unalloyed 12050+Al steel and high alloy austenitic chromium-nickel steel are presented.
Chemical heterogeneity of ductile iron - models and measurements
Kavička, F. ; Stránský, K. ; Dobrovská, J. ; Dobrovská, V. ; Heger, J. ; Million, Bořivoj ; Rek, A.
The paper deals with an original method of measurements of elements microheterogeneity in the structure of ductile iron and with the possibilities of this new method.
Heterogeneity of elements during cast iron crystallization -cast iron with spherical graphite
Stránský, K. ; Šenberger, J. ; Kavička, F. ; Million, Bořivoj ; Dobrovská, J. ; Dobrovská, V. ; Rek, A.
Determination of chemical heterogeneity of alloying elements in iron cast with spherical graphite by using the local chemical analysis of elements. Calculation of chemical heterogenity of cast iron with spherical graphite on basis of thermodynamic, diffusion and phase characteristics.
A contribution to the redistribution of aluminium in a weld joints of steels
Stránský, K. ; Million, Bořivoj ; Foret, R. ; Michalička, Petr ; Rek, A.
An original results of redistribution in welded joints of unalloyed 12050+Al steel and high alloy austenitic chromium-nickel steel are presented. The diffusion coefficients of Al, Cr, Fe and Ni were established and the relation among diffusion coefficients was discussed.
Carbon and phosphorus redistribution in welded joints of carbon steels CSN(412050+0.1
Million, Bořivoj ; Stránský, K. ; Michalička, Petr ; Foret, R. ; Rek, A.
The diffusion specimens were isothermally annealed in the temperature range of 500 to 1100řC intervals. The concentration of P, C, Cr and Ni were measured by applying X-ray energy dispersion anlysis. The diffusion coefficients of P, C, Cr and Ni and thermodynamic interaction parameters were calculated. The uphill diffusion of phosphorus was observed on welding interface.

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