Browsing Ústav materiálových věd a inženýrství by Title
Now showing items 1-20 of 45
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An Ab Initio Study of Connections between Tensorial Elastic Properties and Chemical Bonds in Sigma5(210) Grain Boundaries in Ni3Si
(2018-11-13)Using quantum-mechanical methods we calculate and analyze (tensorial) anisotropic elastic properties of the ground-state configurations of interface states associated with Sigma5(210) grain boundaries (GBs) in cubic ... -
Analysis of cyclic plastic response of heat resistant sanicro 25 steel at ambient and elevated temperatures
(Elsevier, 2014-06-25)Austenitic heat resistant steel Sanicro 25 developed for high temperature applications in power generation industry has been subjected to selected low cycle fatigue tests at ambient and at elevated temperature. Saturated ... -
Atomic Layer Deposition of MoSe2 Using New Selenium Precursors
(Elsevier, 2020-05-01)Among the emerging 2D materials, transition metal chalcogenides are particularly encouraging as alternative semiconducting graphene-like nanomaterial. Recently, 2D MoSe2 has been gaining interest due to its intriguing ... -
Automated calibration of advanced cyclic plasticity model parameters with sensitivity analysis for aluminium alloy 2024-T351
(SAGE Publications, 2019-03-18)The plasticity models in finite element codes are often not able to describe the cyclic plasticity phenomena satisfactorily. Developing a user-defined material model is a demanding process, challenging especially for ... -
Characterization of Polyvinylidene Fluoride (PVDF) Electrospun Fibers Doped by Carbon Flakes
(MDPI, 2020-11-24)Polyvinylidene fluoride (PVDF) is a modern polymer material used in a wide variety of ways. Thanks to its excellent resistance to chemical or thermal degradation and low reactivity, it finds use in biology, chemistry, and ... -
Cold Sprayed Tungsten Armor for Tokamak First Wall
(MDPI, 2019-12-07)Harnessing nuclear fusion is a challenging task, in particular because of the demands put on the used materials. In tokamaks, future energy sources, the inner-most chambers are to be coated with dense coatings of W, or ... -
Densification of Magnesium Aluminate Spinel Using Manganese and Cobalt Fluoride as Sintering Aids
(MDPI, 2020-01-01)Highly dense magnesium aluminate spinel bodies are usually fabricated using pressure-assisted methods, such as spark plasma sintering (SPS), in the presence of lithium fluoride as a sintering aid. The present work investigates ... -
Derivation of losses from impedance spectrum for contour modes of ceramic resonator
(Taylor & Francis, 2020-04-02)Method of loss coefficients calculation from mechanical quality factors of transversal vibration modes is presented. Theoretical formulae are derived for the contour mode of thin square plate and width extensional mode of ... -
Effect of heat treatment on mechanical properties and residual stresses in additively manufactured parts
(Institute of Theoretical and Applied Mechanics of the Czech Academy of Sciences, 2018-05-14)Heat treatments commonly used for post-processing in additive manufacturing (AM) deal with relieving residual stresses. However, generally these treatments reduce strength properties of material such as yield stress (YS) ... -
Elastic and Plastic Behavior of the QE22 Magnesium Alloy Reinforced with Short Saffil Fibers and SiC Particles
(MDPI AG, 2018-02-15)Magnesium alloy QE22 (nominal composition 2 wt % Ag, 2 wt % mixture of rare earth elements, balance Mg) was reinforced with 5 vol % Saffil fibers and 15 vol % SiC particles. The hybrid composite was prepared via the squeeze ... -
Electron Localizations in Alloy Exhibiting Nanotwinning
(MDPI, 2019-09-05)In present work we have used firstprinciples calculations based on density functional theory (DFT) to simulate magneto-optical (MO) Kerr spectra for different phases of Ni2MnGa alloy: austenite, nonmodulated martensite ... -
Evaluation of Sintering Behavior of Premix Al-Zn-Mg-Cu Alloy Powder
(Hindawi, 2015-05-09)Sintering of light aluminium alloys powder has been investigated as a way to substitute steels in automotive and aerospace industries. Premix Al-5.5Zn-2.5Mg-0.5Cu composite powder called Alumix 431D was analyzed in this ... -
Fatigue properties of B1914 superalloy at high temperatures
(Elsevier B.V., 2020-02-19)B1914 is a nickel-based superalloy with an increased amount of B (boron) and C (carbon) to reach an adequate amount of borides and carbides in the cast structure ensuring improved creep properties. However, the influence ... -
First-principles study of Zn-doping effects on phase stability and magnetic anisotropy of Ni-Mn-Ga alloys
(IOP Publishing, 2020-02-04)The effect of Zn doping on Ni-Mn-Ga magnetic shape memory alloy was studied by the first-principles calculations using exact muffin-tin orbital method in combination with the coherent-potential approximation and projector ... -
Highly mobile twin boundaries in seven-layer modulated Ni-Mn-Ga-Fe martensite
(PERGAMON-ELSEVIER SCIENCE LTD, 2020-03-15)We report on low twinning stress of 0.2 MPa for type 1 twin boundaries with rational (101) twinning plane and 0.1 MPa for type 2 twin boundaries with rational [(1) over bar 01] twinning direction, in Ni2MnGa0.8Fe0.2 ... -
In-Flight Temperature And Velocity of Powder Particles of Plasma Sprayed TiO2
(Springer, 2013-10-25)This paper relates to the in-flight temperature and velocity of TiO2 particles, an integral part of the systematic research on atmospheric plasma spraying of the material. Initial powder feedstock (32-45 um, 100% rutile ... -
Influence of Cold-Sprayed, Warm-Sprayed and Plasma Sprayed Layers Deposition on Fatigue Properties of Steel Specimens
(Springer, 2015-03-10)Titanium powder was deposited onto steel specimens using four thermal spray technologies: plasma spray, low-pressure cold spray, portable cold spray, and warm spray. The specimens were then subjected to strain controlled ... -
Influence of Hydroxyapatite Nanoparticles and Surface Plasma Treatment on Bioactivity of Polycaprolactone Nanofibers
(MDPI, 2020-08-20)Nanofibers are well known as a beneficial type of structure for tissue engineering. As a result of the high acquisition cost of the natural polymers and their environmentally problematic treatment (toxic dissolution agents), ... -
Influence of plasma and cold spray deposited Ti Layers on high-cycle fatigue properties of Ti6Al4V substrates
(Elsevier, 2013-02-25)This paper presents a summary of the research on the influence of plasma and cold spray deposition of bio-grade Ti powder on the high-cycle fatigue properties of Ti6Al4V substrates. Four sets of flat specimens (as-received, ... -
Influence of plasma electrolytic oxidation on fatigue performance of AZ61 magnesium alloy
(Elsevier, 2014-05-01)The effect of plasma electrolytic oxidation (PEO) on the fatigue of AZ61 magnesium alloy has been investigated under high cycle conditions in air and 3.5% NaCl solution. PEOemployed an alkaline pyrophosphate-silicate-fluoride ...