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2007.
INFLUENCE OF OPERATING CONDITIONS ON HIGH-CYCLE FATIGUE PROPERTIES OF HIGH ALLOYED STEEL X 20
In this paper, the effect of service temperature and life on high-cycle fatigue properties of base metal, steel X20 CrMoV 12-1, has been analysed. The effect of service conditions has been analysed by testing the new material and material that was in service for 116000 hours. The investigations have included determination of permanent fatigue strength at room and operating temperature. These investigations and their analysis should provide a practical contribution to assessment of behaviour of high alloy steel X20 under variable loading, thus ensuring safety in operation of the components in thermal power plants.