L. Blacha
Silesian University of Technology
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Featured researches published by L. Blacha.
WIT transactions on engineering sciences | 2017
Piotr Buliński; Jacek Smolka; Slawomir Golak; R. Przyłucki; Michal Palacz; G. Siwiec; Jakub Lipart; L. Blacha
The technology of mental melting in a vacuum induction furnace enables the efficient removal of impurities and provides an opportunity to melt refractory metals, such as titanium. These materials can be applied in cutting edge technologies, such as aviation (turbine blades) and biotechnology (prosthesis and implants). To control metallurgical heat and mass processes within an induction furnace, measurements and a numerical analysis can be conducted. In this paper, numerical approaches are discussed. Simulation requires the development of vacuum induction furnace coupling between fluid dynamics and electromagnetic fields. The proposed numerical domain was modelled as a threedimensional slice with a properly defined periodic boundary condition. To define the analysed electromagnetic problem, a set of Maxwell differential equations was specified. A fluid dynamics sub-model was composed of the mass and momentum conservation equations using the volume of fluid multiphase formulation, two-equation k- turbulence model and species transport to track the inclusion position within the melt. The main purpose of this study was an examination of the impurities removal process via the free surface of the melt within an induction furnace. The coupled computations were performed for five operating conditions, including different power inputs of the inductor. The results indicated a strong influence of the inductor power on the free surface area and therefore on the purification process intensity.
Solid State Phenomena | 2013
B. Oleksiak; L. Blacha; Lubomir Pikna; R. Burdzik
In the paper, results of the study on aluminium evaporation from the Ti-Al alloy (6.5%mass) during smelting in a vacuum induction furnace (VIM) are presented as well as the kinetics of the process is discussed. The experiments were performed at 51000 Pa for 1972 K and 2023 K. Based on the determined values of aluminium overall mass transfer coefficient, the mass transfer coefficient in the liquid phase and the evaporation rate constant, the stages that determined the investigated process were defined. It was demonstrated that Al evaporation from the aluminium-titanium alloy is kinetically controlled.
Metalurgija | 2013
L. Blacha; G. Siwiec; B. Oleksiak
Metalurgija | 2014
L. Blacha; J. Mizera; P. Folęga
Metalurgija | 2012
R. Przyłucki; S. Golak; B. Oleksiak; L. Blacha
Archives of Metallurgy and Materials | 2013
L. Blacha; R. Burdzik; A. Smalcerz; T. Matuła
Metalurgija | 2012
L. Blacha; J. Łabaj
Metalurgija | 2013
J. Lipart; T. Matuła; M. Niesler; L. Blacha; J. Filipczyk
Applied Thermal Engineering | 2017
Piotr Buliński; Jacek Smolka; Slawomir Golak; R. Przyłucki; Michal Palacz; G. Siwiec; Jakub Lipart; Ryszard A. Białecki; L. Blacha
Archives of Metallurgy and Materials | 2015
Piotr Buliński; Jacek Smolka; Slawomir Golak; R. Przyłucki; L. Blacha; Ryszard A. Białecki; M. Palacz; G. Siwiec