Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Petr Kawulok"'
Publikováno v:
Journal of Materials Research and Technology, Vol 14, Iss , Pp 1837-1847 (2021)
In recent years, the study of the hot deformation behavior of various materials is significantly marked by an increasing utilization of artificial neural networks, which are frequently employed for a hot flow curve description. This specific kind of
Externí odkaz:
https://doaj.org/article/40fecdeaa05f49dfb522ba89ff5de722
Publikováno v:
Materials & Design, Vol 220, Iss , Pp 110880- (2022)
In recent years, the utilization of artificial neural networks (ANNs) as regression models to solve the issue of hot flow stress forecasting has become a standard approach. In a connection with this kind of regression issue, employed ANNs are usually
Externí odkaz:
https://doaj.org/article/b433fb03031249c39966967bf713c57f
Autor:
Michal Sauer, Richard Fabík, Ivo Schindler, Petr Kawulok, Petr Opěla, Rostislav Kawulok, Vlastimil Vodárek, Stanislav Rusz
Publikováno v:
Materials, Vol 16, Iss 1, p 288 (2022)
It is not realistic to optimize the roll pass design of profile rolling mills, which typically roll hundreds of profiles, using physical modelling or operational rolling. The use of reliable models of microstructure evolution is preferable here. Base
Externí odkaz:
https://doaj.org/article/14329f50344d4a8986730de730286d0d
Autor:
Petr Kawulok, Petr Opěla, Ivo Schindler, Rostislav Kawulok, Stanislav Rusz, Michal Sauer, Kateřina Konečná
Publikováno v:
Materials, Vol 15, Iss 2, p 595 (2022)
The hot deformation behavior of selected non-alloyed carbon steels was investigated by isothermal continuous uniaxial compression tests. Based on the analysis of experimentally determined flow stress curves, material constants suitable for predicting
Externí odkaz:
https://doaj.org/article/cd01d161fca74b59874e8789944634b3
Autor:
Jitka Malcharcziková, Kateřina Skotnicová, Petr Kawulok, Rostislav Kawulok, Ivo Szurman, Jana Růžička
Publikováno v:
Crystals, Vol 12, Iss 2, p 215 (2022)
Ni-Al-Mo based alloys can be used as materials for high temperature applications. They can be prepared by various techniques such as an electron beam zone melting, which allows us to obtain the alloys with a directionally solidified structure and uni
Externí odkaz:
https://doaj.org/article/53e1b890f6904bb8b72a6b1f400b9a5e
Autor:
Ivo Schindler, Rostislav Kawulok, Petr Opěla, Petr Kawulok, Stanislav Rusz, Jaroslav Sojka, Michal Sauer, Horymír Navrátil, Lukáš Pindor
Publikováno v:
Materials, Vol 13, Iss 22, p 5116 (2020)
The combined effect of deformation temperature and strain value on the continuous cooling transformation (CCT) diagram of low-alloy steel with 0.23% C, 1.17% Mn, 0.79% Ni, 0.44% Cr, and 0.22% Mo was studied. The deformation temperature (identical to
Externí odkaz:
https://doaj.org/article/2e580f02d3c7423f927ab960e2310810
Publikováno v:
Metals, Vol 10, Iss 11, p 1413 (2020)
Description of flow stress evolution, specifically an approximation of a set of flow curves acquired under a wide range of thermomechanical conditions, of various materials is often solved via so-called flow stress models. Some of these models are as
Externí odkaz:
https://doaj.org/article/7dd631f1a340464f9d8269f280d0df69
Autor:
Ivo Schindler, Petr Opěla, Petr Kawulok, Jaroslav Sojka, Kateřina Konečná, Stanislav Rusz, Rostislav Kawulok, Michal Sauer, Petra Turoňová
Publikováno v:
Metals, Vol 10, Iss 9, p 1255 (2020)
The deformation behaviour of a coarse-grained as-cast medium-carbon steel, alloyed with 1.2% Mn, 0.8% Cr and 0.2% Mo, was studied by uniaxial compression tests for the strain rates of 0.02 s−1–20 s−1 in the unusually wide range of temperatures
Externí odkaz:
https://doaj.org/article/d4f698f5d81846079ce4ed6c0f3f2950
Autor:
Petr Opěla, Ivo Schindler, Petr Kawulok, Rostislav Kawulok, Stanislav Rusz, Horymír Navrátil, Radek Jurča
Publikováno v:
Materials, Vol 13, Iss 16, p 3480 (2020)
In the presented research, conventional hot processing maps superimposed over the flow stress maps or activation energy maps are utilized to study a correlation among the efficiency of power dissipation, flow stress, and activation energy evolution i
Externí odkaz:
https://doaj.org/article/f0a9a0415961450faf4e7319ed7747ba
Autor:
Rostislav Kawulok, Ivo Schindler, Jaroslav Sojka, Petr Kawulok, Petr Opěla, Lukáš Pindor, Eduard Grycz, Stanislav Rusz, Vojtěch Ševčák
Publikováno v:
Crystals, Vol 10, Iss 4, p 326 (2020)
Based on dilatometric tests, the effect of various values of previous deformation on the kinetics of austenite transformations during the cooling of 100Cr6 steel has been studied. Dilatometric tests have been performed with the use of the optical dil
Externí odkaz:
https://doaj.org/article/0fa8c370ab7f41609d3484d92c298ad9