Materials Literature
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Abstract For assessing fire loads in industrial buildings it is essential to quantify the burning behavior of materials as accurate as adequate. There for the combustion efficiency is used. To determine the combustion efficiency required energies and energy rates can be measured via Cone Calorimeter. Exemplified by tw…
Abstract In the Czech Republic, under normal conditions, the radioactive sources are used transported and stored in accordance with the relevant regulations and instructions of the State Office for Nuclear Safety (SONS), which is the regulatory authority of the state administration. Its main task is to ensure adequate…
In few decades, the technical steps forward accomplished into the acoustic signal transduction and control fields, have brought to the safe release of a large amount of acoustic energy in the body. Today, the High Intensity Focused Ultrasound (HIFU) machines are able to induce tissue’s necrotic thermocoagulation in th…
Although Tesla transformers and helical cavity filters are employed in quite different technical areas, a previous contribution demonstrated that applying the techniques used in designing these filters to the secondary winding configurations of a Tesla transformer improved the spectral purity of the output. In the pre…
Over the past decades, the complexity of requirements regarding the properties of large-diameter linepipes has increased steadily. This is driven by factors such as increasing operating pressures or more hostile environmental conditions. Steel producers all over the world have responded to these demands by continuous…
The critical conditions of hydrogen content and residual stress in the high strength steel weld with the tensile strength level of over 980MPa were investigated. The critical hydrogen concentration for the cold cracking in the Y-grooved constraint weld joint was evaluated with intentionally introducing hydrogen gas. R…
This paper describes metallurgical design concept and mass production result of heavy plates for Bovanenkovo-Ukhta (Yamal-Europe) Gas Pipeline project. The metallurgical design concept was taken as (1) a dual phase microstructure consisting of fine dispersed ferrite and bainite for high strength and high toughness, (2…
Following a proper heat treatment, the alloy system Al–Mg–Zn shows a great wealth of precipitate particles forming coherent (η′ crystals) and incoherent (η crystals) boundaries with the Al matrix. Both the matrix crystal and the precipitate crystals are holohedral, as their point groups correspond to their metric symm…
CeO2-based materials doped with rare earth (TR +3) can be used as alternative to traditional NiO-YSZ anodes in solid oxide fuel cells as they have higher ionic conductivity and lower ohmic losses compared to YSZ. Moreover, they allow fuel cell operation at lower temperatures (500-800°C). In the anode composition, the…
Self-assembled silk fibroin (SF)-polyethylenimine (PEI) multilayered films were fabricated on ethanol treated electrospun SF nanofibrous substrates via the electrostatic layer-by-layer (LBL) adsorption. The film coated membranes were characterized using scanning electron microscopy (SEM), transmission electron microsc…
Abstract Mg-doped high-In-content In x Ga1− x N (x ∼ 0.35) thin films were grown on a c-face sapphire substrate using an MBE apparatus having dual RF nitrogen plasma cells. The films showed p-type conduction under certain cell temperatures of Mg. The p-type conduction was confirmed by electrolyte-based capacitance–vol…
Pipelines can be dented, but shallow dents with depths less than 2% of the pipe diameter have only recently begun to be reported reliably by high resolution in-line geometry inspections. Most thin-walled onshore pipelines around the world are found to contain these shallow dents, many on welds of unknown toughness, or…
Capacity degradation and ion insertion of a miniaturized electrochemical capacitor are studied using ionic liquid [EMI] [TFSI] as the electrolyte. This capacitor is featured with two comb-like electrodes of vertical carbon nanotubes, ∼70 μm in height and 20 μm in interelectrode gap. We quantify the levels of ion inser…
In order to achieve safety and reliability of the pipeline installed in seismic region, it is quite important to apply the high-strength linepipes with sufficient strain capacity against buckling and weld fracture by the seismic ground movement. Dual-phase microstructure control is an essential measure for improving s…
Current line-pipe steels have significantly higher Charpy upper-shelf energy than older steels. Many newer line-pipe steels have Charpy upper-shelf energy in the 300 to 500J range, while older line-pipe steels (pre-1970) had values between 30 and 60J. With this increased Charpy energy comes two different and important…
In the present work, polyethyleneimine (PEI), 2-mercapto-5-benzimidazolesulfonic acid (MBIS), MBIS and thiourea (TU) were added respectively to the conventional Watts bath to investigate the controllable electro-healing on pure Ni plate with a through thickness crack. It is demonstrated that PEI has a strong inhibitio…
This paper describes the use of the second-order polynomial dynamic linear model (DLM) to characterize the growth of the depth of corrosion defects on energy pipelines using imperfect data obtained from multiple high-resolution in-line inspections (ILI). The growth model is formulated by incorporating the general form…
Methods for assessing volumetric corrosion in fittings such as bends or branch connections are not well developed, although limited guidance is given in some codes. For other components and cases where the corrosion profile is complex or there are large external loads, these methods cannot be applied. In addition, det…
The effects of temperature and glass transition on the corrosion protection behavior of an epoxy/urethane polymer coating on steels was investigated. The polymer experience glass transition at 67 ± 1 °C when heating at 4 °C/min. The ohmic resistance of the coating decreased by 4 orders of magnitude and the coating cap…
Application of hulls processing technologies, based on high-concentrated energy sources (laser and plasma technologies), allow improve shipbuilding production. It is typical for high-speed vessels construction using steel and aluminum alloys with high precision hulls required. Report describes high-performance technol…