STP683

    Determination of the Nature of Neutron Irradiation-Induced Dislocation Loops in Magnesium Using Electron Irradiation in the Transmission Electron Microscope

    Published: Jan 1979


      Format Pages Price  
    PDF Version (112K) 7 $25   ADD TO CART
    Complete Source PDF (12M) 7 $149   ADD TO CART


    Abstract

    Magnesium single crystals were irradiated to 2.1 × 1021 neutrons (n)/cm2 (E > 0.1 MeV) near 450 K, one set of specimens being under a compressive stress of 80 MPa applied in the c-direction. A transmission electron microscopy (TEM) investigation of the crystals irradiated under load showed that the neutron damage consisted of dislocation loops. Under in situ electron irradiation in the TEM at 200 kV, some of these loops were observed to shrink. It was deduced that the shrinking loops were of the vacancy type, which is consistent with theoretical predictions [1] of the influence of an external compressive stress on dislocation loop formation during irradiation.

    Keywords:

    radiation, radiation damage, dislocation loops, magnesium, transmission electron microscopy


    Author Information:

    Wolfenden, A
    Guest scientist, Institut für Material- und Festkörperforschung IIWestinghouse Research and Development Center, KarlsruhePittsburgh, Pa.


    Paper ID: STP38154S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP38154S


    CrossRef ASTM International is a member of CrossRef.