TY - JOUR N2 - 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. L1 - http://www.czasopisma.pan.pl/Content/113602/PDF/AMM-2019-4-33-Debinski.pdf L2 - http://www.czasopisma.pan.pl/Content/113602 PY - 2019 IS - No 4 EP - 1470 DO - 10.24425/amm.2019.130114 KW - mixed zone KW - resistance heating KW - computer simulation KW - visualization KW - computational geometry A1 - Dębiński, Tomasz A1 - Hojny, Marcin A1 - Głowacki, M. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences VL - vol. 64 DA - 2019.12.12 T1 - The Methodology of Analysis on Geometrical Changes of a Mixed Zone in Resistance-Heated Samples SP - 1463 UR - http://www.czasopisma.pan.pl/dlibra/publication/edition/113602 T2 - Archives of Metallurgy and Materials ER -