November 2023

Conference Paper

ASSESSMENT OF DEFORMATION MECHANISMS IN NEUTRON-IRRADIATED ACCIDENT-TOLERANT FeCrAl ALLOYS VIA IN SITU MECHANICAL TESTING AND TEM ANALYSIS

By:
Gussev, Maxim N; Field, Kevin G; Zhang, Dalong
Page Number:
339-344
Book Title:
Proceedings of the 19th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors
Publication Date:
November 9, 2023
Conference Name:
19th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors
Conference Location:
Boston, Massachusetts, United States of America
Conference Sponsor:
n/a

Abstract

Iron-chromium-aluminum (FeCrAl) alloys are promising as an accident-tolerant fuel cladding for loss-of-coolant accident scenarios; however, limited data are available on acting deformation mechanisms for this class of materials after neutron irradiation. Here, in situ tensile test experiments were conducted with specimens irradiated at ~1.8 dpa at typical light water reactor temperatures. Selected regions of interest were examined at different strain levels, aiming to investigate the impact of irradiation on acting deformation mechanisms. The fine material microstructure was investigated via transmission electron microscopy. Dislocation structure, radiation-induced defects, and  phase morphology were investigated in detail and compared with scanning electron microscopy-electron backscatter diffraction and mechanical test results.

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