National Repository of Grey Literature 49 records found  previous10 - 19nextend  jump to record: Search took 0.00 seconds. 
Contribution to modelling the diffusion phenomena in the welded joints of steels
Řeháčková, L. ; Million, Bořivoj ; Dobrovská, J. ; Stránský, K.
This contribution contains the original results of measurement of redistribution of carbon in the welded joints of steels (low-alloy Si steel/low-alloy CrNiMoV steel and low-alloy Si steel/austenitic Cr18Ni9 steel). The measurement was carried out in the range of temperatures 500 - 750 C.
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.
Computer simulation of up-hill diffusion in ČSN 17 242/P91 welded joint
Sopoušek, J. ; Million, Bořivoj ; Vřešťál, J.
The DICTRA software is used for simulating diffusion in multiphase diffusion couple ČSN 17242/P91 at temperature ranging 500-1100 C. The examples of calculated phase profiles, activity and concentration profiles of all species at selected condition are shown.
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.
On the thermodynamic and the diffusion interaction coefficients and their mutual relation
Řeháčková, L. ; Million, Bořivoj ; Dobrovská, J. ; Stránský, K.
This contribution deals with the mutual relation of the thermodynamic and diffusion interaction coefficients. The thermodynamic interaction coefficients were determined from the concentration discontinuity of carbon at the interface of the welded steels, the diffusion interaction coefficients from the concentration dependence of the diffusion characteristics.
Crystallization of ductile iron melt - growth and heterogenity of graphitic cells
Stránský, K. ; Šenberger, J. ; Hoch, V. ; Kavička, F. ; Million, Bořivoj
Rate of transformation of melt-grafite heterogeneity of alloing elements C, Si, Mn, S, Mg and O in graphitic cells were calculated by means of model of growth of the spherical graphite particle with the austenitic cover from the ductile iron.

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