Zobrazeno 1 - 8 of 8 pro vyhledávání: '"Petr Sestak"'
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Akademický článek
Segregation of Phosphorus and Silicon at the Grain Boundary in Bcc Iron via Machine-Learned Force Fields
Autor: Miroslav Černý, Petr Šesták
Publikováno v: Crystals, Vol 14, Iss 1, p 74 (2024)
The study of the effects of impurity on grain boundaries is a critical aspect of materials science, particularly when it comes to understanding and controlling the properties of materials for specific applications. One of the related key issues is th
Externí odkaz: https://doaj.org/article/d571416cdb2f4559b2bb8e195c06d2a5
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3
Akademický článek
On Agreement of Experimental Data and Calculated Results in Grain Boundary Segregation
Autor: Miroslav Černý, Petr Šesták, Monika Všianská, 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
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4
Akademický článek
Extraordinary Response of H-Charged and H-Free Coherent Grain Boundaries in Nickel to Multiaxial Loading
Autor: Petr Šesták, Miroslav Černý, Zhiliang Zhang, Jaroslav Pokluda
Publikováno v: Crystals, Vol 10, Iss 7, p 590 (2020)
The cohesive strength of Σ 3, Σ 5, and Σ 11 grain boundaries (GBs) in clean and hydrogen-segregated fcc nickel was systematically studied as a function of the superimposed transverse biaxial stresses using ab initio methods. The obtained results f
Externí odkaz: https://doaj.org/article/58664945c4384393b451693cbfb58b16
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5
Akademický článek
Strength and Brittleness of Interfaces in Fe-Al Superalloy Nanocomposites under Multiaxial Loading: An ab initio and Atomistic Study
Autor: Petr Šesták, Martin Friák, David Holec, Monika Všianská, Mojmír Šob
Publikováno v: Nanomaterials, Vol 8, Iss 11, p 873 (2018)
We present an ab initio and atomistic study of the stress-strain response and elastic stability of the ordered Fe 3 Al compound with the D0 3 structure and a disordered Fe-Al solid solution with 18.75 at.% Al as well as of a nanocomposite consisting
Externí odkaz: https://doaj.org/article/f96170a4cfd14325bedacbbc7bb49bd8
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6
Akademický článek
A Fractographic Study of Bending/Torsion Fatigue Failure in Metallic Materials with Protective Surface Layers
Autor: Karel Slámečka, Petr Šesták, Tomáš Vojtek, Marta Kianicová, Jana Horníková, Pavel Šandera, Jaroslav Pokluda
Publikováno v: Advances in Materials Science and Engineering, Vol 2016 (2016)
Results are given of a fractographic study of biaxial in-phase bending/torsion fatigue fractures in specimens made of nitrided steel and nickel-based superalloy with protective coatings (diffusion coatings and plasma-sprayed thermal barrier coatings)
Externí odkaz: https://doaj.org/article/b2514909ce6e4fe2b6d89e58a0506de3
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7
Akademický článek
Stress Coupling Effect on Ideal Shear Strength: Tungsten as a Case Study
Autor: Miroslav Černý, Petr Šesták, Jaroslav Pokluda
Publikováno v: Advances in Materials Science and Engineering, Vol 2016 (2016)
Mechanical response of a perfect bcc tungsten crystal to a multiaxial loading was investigated from first principles. The multiaxial stress state consisted of the shear stress and a superimposed compressive triaxial stress with various levels of diff
Externí odkaz: https://doaj.org/article/c7a92cf6478d4a21ae606c363682537f
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