Zobrazeno 1 - 10
of 193
pro vyhledávání: '"Pavel Lejček"'
Publikováno v:
Metals, Vol 12, Iss 8, p 1389 (2022)
There are two sources of quantitative data on grain boundary segregation: careful experimental results and calculated data. These values can be compared in various ways. Here we show a comparison of average concentrations of silicon, vanadium, and ti
Externí odkaz:
https://doaj.org/article/7d857fb20a51495db0574f01fb62eaf0
Autor:
Orsolya Molnárová, Stanislav Habr, Jaroslav Čapek, Ondřej Ekrt, Přemysl Málek, Lucia Bajtošová, Andrea Školáková, Pavel Lejček
Publikováno v:
Metals, Vol 12, Iss 3, p 398 (2022)
Recently, the complex shearing of extruded tube (CSET) technique was proposed representing a new way of processing tubes from a bulk billet as a combination of extrusion with two passes of equal channel angular processing and possible mandrel rotatio
Externí odkaz:
https://doaj.org/article/6c74806edc744da0a5d3c95f1f5aee43
Autor:
Pavel Lejček, Siegfried Hofmann
Publikováno v:
Metals, Vol 11, Iss 8, p 1331 (2021)
The question is formulated as to whether entropy-driven grain boundary segregation can exist. Such a phenomenon would be based on the assumption that a solute can segregate at the grain boundary sites that exhibit positive segregation energy (enthalp
Externí odkaz:
https://doaj.org/article/557292c4a1f54320a655c526b6a49f17
Autor:
Martin Ševčík, Jan Zídek, Jitka Nejezchlebová, Jan Štefan, Anna Machová, Hanuš Seiner, Alena Uhnáková, Jaroslav Čapek, Pavel Lejček
Publikováno v:
Results in Physics, Vol 14, Iss , Pp - (2019)
This paper is dedicated to experimental and atomistic study of the influence of so called T-stress (acting along the crack plane) on fracture processes in bcc iron. We analyze experimental results from fracture tests performed at room temperature on
Externí odkaz:
https://doaj.org/article/705e58e3ba954ab194a0ff03d208f8db
Publikováno v:
Entropy, Vol 16, Iss 3, Pp 1462-1483 (2014)
Chemical composition of interfaces—free surfaces and grain boundaries—is generally described by the Langmuir–McLean segregation isotherm controlled by Gibbs energy of segregation. Various components of the Gibbs energy of segregation, the stand
Externí odkaz:
https://doaj.org/article/8f33450ac9e6426b9454ce17d529b9f3
Autor:
Orsolya Molnárová, Andrea Školáková, Stanislav Habr, Jaroslav Čapek, Zdeněk Weiss, Přemysl Málek, Pavel Lejček
Publikováno v:
Procedia Structural Integrity. 43:166-171
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1a0d7e669f97c3b1ac1bcdea875068fa
https://doi.org/10.1016/j.prostr.2022.12.253
https://doi.org/10.1016/j.prostr.2022.12.253
Autor:
S. Hofmann, Pavel Lejček
Publikováno v:
Journal of Materials Science. 56:7464-7473
The phenomenon of entropy-dominated grain boundary segregation is introduced and discussed. Numerous examples of the grain boundaries and solutes exhibiting this phenomenon are compiled and predicted for example of α-iron-based alloys and other host
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f849e6b46dddfc91a44fb31b9325412b
https://doi.org/10.1007/s10853-021-05800-w
https://doi.org/10.1007/s10853-021-05800-w
Autor:
P. Málek, Ondřej Ekrt, Pavel Lejček, Gergely Németh, Jaroslav Čapek, Esther de Prado, Stanislav Habr, Orsolya Molnárová
Publikováno v:
Materials
Materials, Vol 14, Iss 5770, p 5770 (2021)
Volume 14
Issue 19
Materials, Vol 14, Iss 5770, p 5770 (2021)
Volume 14
Issue 19
A new severe plastic deformation technique, known as the complex shearing of extruded tube (CSET), was applied to a 3003 based model aluminium alloy. This technique, consisting of a combination of extrusion and two consecutive Equal Chanel Angular Pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d64357f1ea05414f42f2e079ec63a57
http://europepmc.org/articles/PMC8510084
http://europepmc.org/articles/PMC8510084
Autor:
Siegfried Hofmann, Pavel Lejček
Publikováno v:
Metals; Volume 11; Issue 8; Pages: 1331
Metals, Vol 11, Iss 1331, p 1331 (2021)
Metals. 2021, vol. 11, issue 8, p. 1-10.
Metals, Vol 11, Iss 1331, p 1331 (2021)
Metals. 2021, vol. 11, issue 8, p. 1-10.
The question is formulated as to whether entropy-driven grain boundary segregation can exist. Such a phenomenon would be based on the assumption that a solute can segregate at the grain boundary sites that exhibit positive segregation energy (enthalp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bc4b709e9795b883a3a898cd8604ae21
Autor:
Alena Uhnáková, Anna Machová, Michaela Janovská, Martin Ševčík, Jan Štefan, Petr Hora, Jaroslav Čapek, Pavel Lejček
Publikováno v:
Journal of Applied Physics. 132:065107
This paper is devoted to an experimental and 3D atomistic study of the influence of loading rate on fracture toughness in dilute Fe–Si alloys and in bcc iron. We analyze new and previous experimental results from fracture tests performed at room te
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::75f869e92b6a82662e3cffbf471a1686
https://doi.org/10.1063/5.0101626
https://doi.org/10.1063/5.0101626