New types of ceramic coatings based on SiO2-Na2O-B2O3-TiO2 oxide phases were investigated as protection for boiler steel in power generation systems. Low-alloyed Cr-Mo 16Mo3 was coated with different compositions enamel to assess the protective potential these under water vapor at high temperatures. Oxidation 650 °C 50 h Ar + performed a TGA apparatus investigate oxidation kinetics. The results...

The research represents the ongoing investigation of welded joints behavior made low-carbon low-alloyed steel in presence different multiple defects. Following initial experimental and numerical analyses performed on low-grade steel, a set experiments were with specimens EN 1.0044 (commercial designation S275JR), along development new models. Four combinations made, including defects like under...

Slow strain rate test (SSRT) represent a dynamic slowly increasing strain imposed by an external means on uniaxial tension specimen according to ASTM G 129 standard. It is used for relatively rapid screening or comparative evaluation of environmental, processing or metallurgical variables that can affect resistance of material. Testing has been accomplished on low-alloyed boiler steel 14MoV6-3 ...

Two high-strength low-alloyed steels alloyed with various Nb contents were prepared using continuous casting (CC) technology. In the round Steel 30Nb CC billet, it was segregation of C and in central equiaxed zone that promoted precipitation primary NbC carbides at grain boundaries. After processing into seamless tubes, micron-sized located middle bands, surrounded by many nano-sized formed dur...

OBJECTIVE To test the applicability of different types of commercially available electrodes and electrode gels or pastes for recording of slow EEG potentials. METHODS Experiments were carried out on six types of reusable electrodes (silver, tin and gold cup electrodes, sintered silver-silver chloride (Ag|AgCl), platinum, stainless steel), six disposable Ag|AgCl electrode models, and nine gels...