A5056535848- High Temperature Alloys and Creep
- Fatigue and fracture mechanics
- Microstructure and Mechanical Properties of Steels
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced Power Generation Technologies
- Fire effects on concrete materials
- Aluminum Alloy Microstructure Properties
- Surface Treatment and Coatings
- High-Temperature Coating Behaviors
- Intermetallics and Advanced Alloy Properties
- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- Titanium Alloys Microstructure and Properties
- High Entropy Alloys Studies
- Graphite, nuclear technology, radiation studies
- Cyclone Separators and Fluid Dynamics
Czech Technical University in Prague
2022-2024
Ujp Praha (Czechia)
2023-2024
Despite the current tendencies towards decarbonization of energy sector, it is still necessary to maintain lifetime existing coal-fired power plants. Austenitic stainless steels belong among materials used in energetics, this case, SUPER 304H (X10CrNiCuNb18-9-3). This steel for experiment that simulates real operating conditions, specifically high temperature (700°C) and constant inner pressure (25 MPa), which induced by inserting a distilled water medium before sealing. work deals with...
This paper describes the influence of technological treatments (i.e., bending or welding) on structural stability SUPER304H austenitic steel used in reheaters and superheaters fossil fuel power plants. Although worldwide trend is transitioning to green sources, lifetime existing plants has be prolonged until transition complete. Experimental material was tested as-received state (straight tubes), bends, homogeneous weld joints. Part specimens solution-annealed after operation. Afterwards,...
This paper describes a metallographic preparation of the heat-exchanger austenitic stainless steels, i.e., SUPER 304H, HR3C and Sanicro 25. The as-received materials delivered after solution annealing are very resistant to chemical etchants. Therefore, it is more efficient optimize parameters electrolytic etching in acidic or basic electrolytes. After materials’ operation under elevated temperatures (600–750 °C), microstructure easier etch due reduction corrosion resistance. For following...
Abstract Aim of the article is to provide properties comparison between initial state and two thermally exposed states creep resistant steel SUPER 304H by usage conventional miniaturised tensile test specimens. Tests were performed at room temperature. Thermally material was aged 15 30 thousand hours 675°C. This exposition which simulated accelerated operation caused precipitation intermetallic phases affect mechanical like ultimate strength elongation. The tests showed a decrease in...