Low cycle fatigue of materials in nuclear industry

Abstract

Investigation data on low cycle fatigue of steel and its welds, widely used in nuclear industry, have been summarized. This information has been received on rather representative number of base metal heats and welded samples for reactor pressure vessels, steam generators and pipe-lines. Experimental data have been compared with Reference curves in Russian Strength Calculation Norms PNAE G-7-002-86. It has been shown that the values of margin factors nσ =2 and nN = 10 in fatigue strength as-sessment of equipment from ferrite and austenite steels are provided.