STP1405

    Post-Irradiation Deformation Microstructures in Fe-9Cr

    Published: Jan 2001


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    Abstract

    The deformed microstructures of both irradiated and unirradiated Fe-9Cr uniaxial tensile specimens have been examined to identify controlling mechanisms. Deformation following irradiation is found to occur in poorly defined channels, causing formation of discrete steps at surfaces and delineated by nonuniformly distributed highly elongated voids. Deformation is by motion of a2<111> dislocations, which interact with and decompose irradiation-induced a<100> loops. The structure formed after extensive deformation consists of highly complex cell walls and moderate densities of individual slip dislocations.

    Keywords:

    post-irradiation deformation, ferritic steel, fractography, dislocations, voids


    Author Information:

    Gelles, DS
    Staff Engineer and Senior Scientist, PNNL Materials Research Department, Richland, WA

    Hamilton, ML
    Staff Engineer and Senior Scientist, PNNL Materials Research Department, Richland, WA

    Schäublin, R
    Research Associate, EPFL-CRPP Fusion Technology, Villigen PSI,


    Paper ID: STP10554S

    Committee/Subcommittee: E10.02

    DOI: 10.1520/STP10554S


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