A5103018847- High-Temperature Coating Behaviors
- Advanced materials and composites
- Microstructure and Mechanical Properties of Steels
- Intermetallics and Advanced Alloy Properties
- High Entropy Alloys Studies
- High Temperature Alloys and Creep
- Welding Techniques and Residual Stresses
- Fusion materials and technologies
- Nuclear Materials and Properties
- Metal and Thin Film Mechanics
- Advanced ceramic materials synthesis
- Aluminum Alloys Composites Properties
- Materials Engineering and Processing
- Metallurgical and Alloy Processes
- Fatigue and fracture mechanics
- Metal Alloys Wear and Properties
- Nuclear reactor physics and engineering
- Graphite, nuclear technology, radiation studies
- Material Properties and Failure Mechanisms
- Molecular Junctions and Nanostructures
- Subcritical and Supercritical Water Processes
- Non-Destructive Testing Techniques
- Mechanical and Thermal Properties Analysis
- Advanced Chemical Physics Studies
- Metallurgy and Material Science
Brno University of Technology
2014-2024
Research Centre Rez
2014-2024
Slovak Academy of Sciences
2007
This paper examines the softening behaviour of cold sprayed 7075 aluminum alloy after isothermal annealing. The as-received powder was deposited by a high-pressure spray device using heated nitrogen as propellant gas. To investigate effects post-deposition heat treatment, excised samples were isochronally annealed in temperature range 200 to 400°C. feedstock and free-standing coatings initially characterized through various electron microscopy techniques (SEM, EDS, EBSD) relevant...
Results of computer simulations long term service exposure for weldments the CSN 15 128/P91 and SK3STC/P91 steels are presented compared with corresponding results phase composition experiments. The welded material P91 (EU designation: X10CrMoVNb 9–1) represents progressive chromium steel alloyed molybdenum, vanadium, carbon, nitrogen. 128 (13CrMoV 2–5) is low alloy Cr–Mo–V steel. SK3STC (12CrMo 10–10) consumable electrode material. stability weldment microstructure investigated at elevated...
The environmental performance of structural materials (e.g., corrosion and assisted cracking) is one the critical issues being addressed in development Generation IV fast reactors. This work aims to support study ferritic-martensitic steel T91 liquid lead, under close operation conditions, order assess its suitability for an application lead was tested air at 400 °C using static slow loading regimes. Applied stresses were chosen be slightly above yield strength evaluate threshold stress...
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Abstract AlCoCrFeNi 2.1 alloy, which belongs to the group of eutectic high-entropy alloys (EHEAs), possesses a combination increased strength and ductility. It should retain these properties over wide temperature range due high entropy effect system. At same time, are generally considered have good castability, increases possibility casting alloy in larger volumes. One processes, that does not avoid when applied industry, various joining techniques including electron beam welding. The weld...
Abstract The environment in supercritical water-cooled reactors (SCWR) is highly corrosive. With increasing time of operation, an oxide layer grows on the surfaces fuel rod cladding, which increases roughness their surface. aim this study investigation effect due to corrosion heat transfer a fluid at pressure conditions. drastic variations thermophysical properties SCW can lead deterioration or enhancement transfer. correct prediction deterioration, cause sharp temperature peaks cladding big...
The paper presents results obtained during evaluation of dissimilar weld joints creep-resistant steels. During high temperature exposure joints, alloying elements were redistributed across the interface. These diffusion effects can cause local changes microstructure and have a direct effect on mechanical properties in interface area. Carbon nitrogen strongest influence . strong reliability service live whole welded structures. austenitic steel/martenzitic steel type was studied. Laboratory...
Heating elements are one of the important components High Temperature Helium Loop. By means heating test section loop to required temperature is provided even in high gas flow rates loop. The insulation was manufactured cordierite ceramics. With these maximum projected 900 °C could not be reached because decreasing electric resistance among spirals. Therefore several tests were done order discover reason problem. Consequently properties new ceramic material based on corundum for...
Abstract On-surface mass transport is the key process determining kinetics and dynamics of on-surface reactions, including formation nanostructures, catalysis, or surface cleaning. Volatile organic compounds (VOC) localized on a majority surfaces dramatically change their properties act as reactants in many reactions. However, fundamental question “How far how fast can molecules travel to react?” remains open. Here we show that isoprene, natural VOC, ~1 μm s −1 , i.e., centimeters per day,...
In this work, the low-density Al 0.5 NbTa 0.8 Ti 1.5 V 0.2 Zr RHEA prepared by mechanical alloying combined with hot uniaxial pressing (HP) was investigated. The alloy subjected to different sintering temperatures on range of 1200°C up 1600°C, while keeping a constant densification time. influence increase in RHEAs’ microstructural features, composition and basic properties explored means x-ray diffraction scanning electron microscopy, hardness testing, density determination Archimedes’...
Abstract Development of liquid lead cooled nuclear systems requires consideration compatibility issues with the construction materials. In order to understand corrosion or passivation behavior 316 L austenitic stainless steel, steel specimens were exposed for 1000 h in 1 × 10−7 wt % oxygen level at 480 °C static and flowing (velocity 1.6 m/s) conditions. Post-test microscopy investigation using scanning electron microscope focused ion beam (FIB) was performed it demonstrated significant...
In the present work, High-Entropy Alloys Al 0.2 Co 1.5 CrFeNi Ti, 1.3 1.4 Cr 2.0 FeNi 4.0 Ti and 6.0 1.2 2.5 3.5 were produced by Mechanical Alloying subsequent Spark Plasma Sintering processes to obtain properly densified bulks. The characterization of materials was accomplished through X-Ray Diffraction, Scanning Electron Microscopy, microhardness nanoindentation tests identify analyze acquired microstructures’ features, phases formed, morphology size grains its average hardness. results...
The immiscible Cu-Fe system is often used as a base for new advanced alloys.In the current study, three batches of same (Cu70Fe15Co15)89W11 alloy were prepared by mechanical alloying with different milling time and subsequent SPS consolidation.The effect on microstructure properties powder bulk samples was subject to study.The milled consists FCC Cu-based supersaturated solid solution particles pure W, which did dissolve only partially.During consolidation, partially decomposed (Fe,...
The weldability of advanced heat resistant ODS metallic materials in combination with conventional is a prior requirement for their wider use energy production. microstructure steels composed alpha iron based matrix dispersed oxide particles. Due to heating during welding, the and properties resulting weld joints are affected often become weakest point structure. electron beam welding its reduced zone size may be an answer this. presented article focused on thorough metallographic evaluation...