Zobrazeno 1 - 10
of 92
pro vyhledávání: '"R. Kawulok"'
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 68, Iss No 2, Pp 741-747 (2023)
A simple methodology was used for calculating the equivalent strain values during forming the sample alternately in two mutually perpendicular directions. This method reflects an unexpected material flow out of the nominal deformation zone when formi
Externí odkaz:
https://doaj.org/article/ed347f8d4dfb4eca8d685d85ba73049f
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 65, Iss No 2, Pp 727-734 (2020)
High-temperature plastic properties of heat-resistant stainless steel X15CrNiSi 20-12 were assessed on the basis of hot tensile tests and nil strength tests. The results were supported by metallographic analyses using SEM and EDX analysis. The formab
Externí odkaz:
https://doaj.org/article/87c47bbe202248e3959a845537ca47c5
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 63, Iss No 4, Pp 1785-1792 (2018)
Influence of the initial grain size on hot deformation behavior of the low-alloy Mn-Ti-B steel was investigated. The uniaxial compression tests were performed in range of the deformation temperatures of 900-1200°C and strain rates of 0.1-10 s–1. O
Externí odkaz:
https://doaj.org/article/8972a4f607b84ba6b603e16d122a1fc6
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 63, Iss No 4, Pp 1743-1748 (2018)
The aim of the performed experiments was to determine the influence of deformation and of austenitization temperature on the kinetics of phase transformations during cooling of high-carbon steel (0.728 wt. % C). The CCT and DCCT diagrams for austenit
Externí odkaz:
https://doaj.org/article/baf69fe36e6444439b82b92a16ac4d29
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 63, Iss No 4, Pp 1735-1741 (2018)
The work deal with an assembling and comparing of transformation diagrams of two low-alloy steels, specifically 16MnCrS5 and 20MnCrS5. In this work, diagrams of the type of CCT and DCCT of both steels were assembled. Transformation diagrams were asse
Externí odkaz:
https://doaj.org/article/f7ee74429a4f4e6aa6601b471d3ca4ed
Publikováno v:
Metalurgija, Vol 55, Iss 4, Pp 655-658 (2016)
Rods from mild steel S235JR were intensively rolled in the laboratory continuous mill. Specifically defined temperature of phase transformation Ar was determined from the free cooling curves measured by the temperature scanner. The Ar value increased
Externí odkaz:
https://doaj.org/article/8351bd99593740dcbe03d6c3bea2fc8a
Autor:
P. Kawulok, I. Schindler, R. Kawulok, S. Rusz, P. Opěla, J. Kliber, M. Kawuloková, Z. Solowski, K. M. Čmiel
Publikováno v:
Metalurgija, Vol 55, Iss 3, Pp 365-368 (2016)
Formability of hypereutectoid C-Mn-Cr-V steel in hot condition was investigated with use of plastometric methods. A wide range of deformation temperatures 1 300 - 640 °C for hot tensile tests was proposed with use of nil-strength temperature (NST),
Externí odkaz:
https://doaj.org/article/eb396db15ba54d67b22b20533e08d054
Autor:
R. Kawulok, I. Schindler, P. Kawulok, S. Rusz, P. Opěla, J. Kliber, Z. Solowski, K. M. Čmiel, P. Podolínský, M. Mališ, Z. Vašek, F. Vančura
Publikováno v:
Metalurgija, Vol 55, Iss 3, Pp 357-360 (2016)
The aim of this article was to assess the impact of previous plastic deformation on the kinetics of transformations of four selected steels. The research was conducted with use of the universal plastometer GLEEBLE 3800, when Continuous Cooling Transf
Externí odkaz:
https://doaj.org/article/be1375c7d10f44e7bb0a8beda1f9c7f8
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 63, Iss No 2 (2018)
The aim of the performed experiments was to determine the influence of a cooling rate on the evolution of microstructure and hardness of the steel 27MnCrB5. By using dilatometric tests performed on the plastometer Gleeble 3800 and by using mathematic
Externí odkaz:
https://doaj.org/article/3b957c6e4ca04880bb0220d288691aa7
Publikováno v:
Metalurgija, Vol 54, Iss 3, Pp 469-472 (2015)
Flows stress of the steel C45 were predicted on the basis of experimentally obtained flow stress curves, using uniaxial hot compression tests on the plastometer HDS-20, by two completely different types of mathematical models, moreover with compariso
Externí odkaz:
https://doaj.org/article/daedb28ac90946ed9b5035616b8c674f