The Methodology of Analysis on Geometrical Changes of a Mixed Zone in Resistance-Heated Samples

• Autorzy: Dębiński T. , Głowacki M. , Hojny M.

Identyfikatory

DOI

10.24425/amm.2019.130114

• Języki publikacji: EN

Abstrakty

EN

The article presents the use of computer graphics methods and computational geometry for the analysis on changes of geometrical parameters for a mixed zone in resistance-heated samples. To perform the physical simulation series of resistance heating process, the Gleeble 3800 physical simulator, located in the Institute for Ferrous Metallurgy in Gliwice, was used. The paper presents a description of the test stand and the method for performing the experiment. The numerical model is based on the Fourier-Kirchoff differential equation for unsteady heat flow with an internal volumetric heat source. In the case of direct heating of the sample, geometrical parameters of the remelting zone change rapidly. The described methodology of using shape descriptors to characterise the studied zone during the process allows to parametrise the heat influence zones. The shape descriptors were used for the chosen for characteristic timing steps of the simulation, which allowed the authors to describe the changes of the studied parameters as a function of temperature. Additionally, to determine the impact of external factors, the remelting zone parameters were estimated for two types of grips holding the sample, so-called hot grips of a shorter contact area with the sample, and so-called cold grips. Based on the collected data, conclusions were drawn on the impact of the process parameters on the localisation and shape of the mushy zone.

Słowa kluczowe

EN

mixed zone; resistance heating; computer simulation; visualization; computational geometry

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2019
• Tom: Vol. 64, iss. 4
• Strony: 1463--1470
• Opis fizyczny: Bibliogr. 9 poz., fot., rys., tab., wzory

Twórcy

autor

Dębiński T.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, al. Mickiewicza 30, 30-059, Kraków, Poland

autor

Głowacki M.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, al. Mickiewicza 30, 30-059, Kraków, Poland
• The Jan Kochanowski University (JKU), Division of Computer Science, 5 Żeromskiego Str., 25-369 Kielce, Poland

autor

Hojny M.

• AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, al. Mickiewicza 30, 30-059, Kraków, Poland

Bibliografia

• [1] Stephen P. Midson, Industrial Applications for Aluminum Semi-Solid Castings, Solid State Phenomena 217-218, 487-495 (2015).
• [2] T. Debinski, Estimation of localisation and geometric parameters for the semi-solid zone of steel samples. Technical Transactions, Mechanics, Politechnika Krakowska, 2018.
• [3] E. E. Underwood, Quantitative Stereology, Addison Weslay, Reading 1970.
• [4] J. C. Russ, Practical Stereology, Plenum Press, New York, 1986.
• [5] E. Stein, M. Bachmann, W. Heldens, A. Muller, Ch. Schmullius, A Spectral feature based classification algorithm for characterization of urban surfaces in Munich, 6th ERSeL SIG Image Spectroscopy Symposium, Tel-Aviv, 2009.
• [6] M. Hojny, Modeling of Steel Deformation in the Semi-Solid State, Advanced Structured Materials 47 Springer (2018).
• [7] Y. Mingqiang, K. Kidiyo, J. Ronsin, A Survey of Shape Feature Extraction Techniques, Pattern Recognition, PengYeng Yin (Ed.) 43-90 (2008)
• [8] F. P. Preparata, M. I. Shamos, Computational Geometry. An Introduction, Springer-Verlag New York Inc., 1985.
• [9] OpenGL (http://www.opengl.org), 2017-04-15.

Uwagi

EN

2. Development of geometric methods for mushy-zone estimation supported by AGH grant no. 11.11.110.593