Zobrazeno 1 - 10
of 53
pro vyhledávání: '"Jaroslav Čech"'
Autor:
Filip Průša, Petr Kratochvíl, Angelina Strakošová, Miroslav Karlík, Andrea Školáková, Jaroslav Čech, Petr Haušild, Jiří Čapek, Marek Vronka, Jozef Veselý, Hana Thürlová, Marcello Cabibbo, Ondřej Jankovský
Publikováno v:
Journal of Materials Research and Technology, Vol 32, Iss , Pp 860-873 (2024)
The CoCrFeNiMnX (X = 5, 20, and 35 at.%) alloys, reinforced with 5 at.% SiC powder, were prepared by mechanical alloying and spark plasma sintering. This preparation method resulted in microstructural refinement of the FCC solid solution grains, whil
Externí odkaz:
https://doaj.org/article/52c5c659051640f0a63f877a70933f87
Autor:
Petr Kratochvíl, Filip Průša, Hana Thürlová, Angelina Strakošová, Miroslav Karlík, Jaroslav Čech, Petr Haušild, Jiří Čapek, Ondřej Ekrt, Markéta Jarošová, Marek Vronka, Jozef Veselý, Peter Minárik, Ondřej Jankovský, Marcello Cabibbo
Publikováno v:
Journal of Materials Research and Technology, Vol 30, Iss , Pp 4248-4260 (2024)
Nearly equiatomic AlCoCrFeNi alloy samples were prepared by induction melting and mechanical alloying (MA) combined with spark plasma sintering (SPS). The cast sample showed a dendritic microstructure composed of spinodally decomposed nanometric cons
Externí odkaz:
https://doaj.org/article/c578d185b3e74af09e83517b5e3c0b87
Indentation Size Effect in Electrodeposited Nickel with Different Grain Size and Crystal Orientation
Publikováno v:
Crystals, Vol 13, Iss 9, p 1385 (2023)
Indentation size effect at shallow indentation depths still remains a challenge as it cannot be correctly described by the Nix–Gao model based on the concept of strain gradient plasticity and geometrically necessary dislocations. The reasons for th
Externí odkaz:
https://doaj.org/article/a67217bc80434e83b322ab520aba81a2
Publikováno v:
Crystals, Vol 13, Iss 4, p 580 (2023)
The ionized jet deposition (IJD) method is applied to the preparation of thin films composed of refractory HfNbTiTaZr high-entropy alloy (HEA). Due to its stoichiometric reliability, the IJD method provides a flexible tool for deposition of complex m
Externí odkaz:
https://doaj.org/article/59d3d6e7a616479d80f8e078e67b8ed3
Autor:
Miroslav Karlík, Filip Průša, Petr Kratochvíl, Hana Thürlová, Angelina Strakošová, Jaroslav Čech, Jiří Čapek, Marek Vronka, Marcello Cabibbo, Ondřej Ekrt
Publikováno v:
Materials, Vol 16, Iss 6, p 2491 (2023)
Three mechanically alloyed (MA) and spark plasma sintered (SPS) CoCrFeNiNbX (X = 5, 20, and 35 at.%) alloys with an addition of 5 at.% of SiC were investigated. The face-centered cubic (FCC) high-entropy solid solution, NbC carbides, and hexagonal La
Externí odkaz:
https://doaj.org/article/3892f16ef5ac4ab9945b646909de9cf5
Publikováno v:
Acta Polytechnica CTU Proceedings, Vol 27, Iss 0, Pp 141-144 (2020)
High entropy alloy HfNbTaTiZr in as cast conditions and after high pressure torsion straining was characterized by nanoindentation. The length-scale dependent material response (indentation size effect) was characterized by indentation at various ind
Externí odkaz:
https://doaj.org/article/b36ab72c272644fc92ca63225b94c2e1
Autor:
Jaroslav Čech, Petr Haušild, Miroslav Karlík, Kateřina Nová, Filip Průša, Pavel Novák, Jaromír Kopeček
Publikováno v:
Acta Polytechnica CTU Proceedings, Vol 27, Iss 0, Pp 6-12 (2020)
The study is devoted to the intermetallic alloy FeAl20Si20 (wt.%) with the potential applications in high temperature aggressive environments. The samples of the same chemical composition were prepared by spark plasma sintering from the different mec
Externí odkaz:
https://doaj.org/article/05cc8630d6a444e4a65227165d20ab72
Publikováno v:
Acta Polytechnica CTU Proceedings, Vol 27, Iss 0, Pp 149-154 (2020)
Tungsten heavy alloys are composite materials containing spherical tungsten particles embedded in binder matrix. Their excellent mechanical properties can be further improved by rotary forging. This paper aims to gain deeper understanding of the forg
Externí odkaz:
https://doaj.org/article/273edf6269894ba8bbb406d835f44bee
Autor:
Karel Trojan, Václav Ocelík, Jiří Čapek, Jaroslav Čech, David Canelo-Yubero, Nikolaj Ganev, Kamil Kolařík, Jeff T. M. De Hosson
Publikováno v:
Metals, Vol 12, Iss 2, p 243 (2022)
Hot working tool steel (AISI H13) is one of the most common die materials used in casting industries. A die suffers from damage due to friction and wear during its lifetime. Therefore, various methods have been developed for its repair to save costs
Externí odkaz:
https://doaj.org/article/f4fec5a8266e4afa82acfa58fded8102
Autor:
Karel Trojan, Václav Ocelík, Nikolaj Ganev, Stanislav Němeček, Jaroslav Čech, Jiří Čapek, Jakub Němeček
Publikováno v:
Acta Polytechnica CTU Proceedings, Vol 17, Iss 0, Pp 15-19 (2018)
The aim of this paper is to describe the effects of annealing on the microstructure of laser cladded AISI H13 tool steel using various methods. Advanced laser technology has the potential to replace conventional methods to make and repair dies. Howev
Externí odkaz:
https://doaj.org/article/e4a2480de2704273a5e577e12abaff77