MICROSTRUCTURAL STUDY OF AN IRRADIATED HIGH-NICKEL ALLOY BY X-RAY-LINE PROFILE ANALYSIS AND TEM OBSERVATIONS

The microstructure was investigated in previously deformed specimens o f a high-nickel alloy with four levels of initial dislocation density, both before and after irradiation in BOR-60 reactor at 370-400 degree s C and three displacement rates. The network dislocation density, dis location loop radius and loop number density were determined by both X -ray line profile analysis and TEM observations. The dependence of dis location structure parameters on irradiation conditions and initial ne twork density was obtained.