Cracking of Welded Structures in Power Engineering Systems

An increase in demand for electric power necessitates the revamping and construction of systems characterised by increasingly high efficiency. The construction of power units exposed to supercritical and ultra-supercritical parameters requires the use of new technologies and materials. The study presents two examples concerned with the cracking of boiler systems related to the use of a new hybrid welding technology and the use of a new material, i.e. Alloy 59. It was ascertained that the use of state-of-the-art technologies and materials is justified, yet requires the analysis and verification of designs assumptions and operating conditions.