You are being redirected because this document is part of your ASTM Compass® subscription.
    This document is part of your ASTM Compass® subscription.

    STP1125

    Radiation-Induced Segregation in 20Cr/25Ni/Nb Stainless Steel

    Published: 0


      Format Pages Price  
    PDF (452K) 18 $25   ADD TO CART
    Complete Source PDF (28M) 1299 $264   ADD TO CART

    Cite this document

    X Add email address send
    X
      .RIS For RefWorks, EndNote, ProCite, Reference Manager, Zoteo, and many others.   .DOCX For Microsoft Word


    Abstract

    Intergranular corrosion of irradiated austenitic steels has been attributed to compositional changes produced by radiation-induced segregation at grain boundaries, and the effect has been investigated for the 20Cr/25Ni/Nb stainless steel employed as fuel cladding in advanced gas-cooled reactors. Analytical electron microscopy has been used to determine compositional profiles at grain boundaries in irradiated samples.

    The observations are explained in terms of a model based on the inverse Kirkendall effect. At higher doses, interpretation is complicated by grain boundary migration, and compositional changes are found to persist after a boundary has moved away. The compositional profiles are compared with corrosion data for the same irradiated material. Results of Strauss corrosion tests are found to correlate with widths of chromium-depleted zones.

    Silicon segregation towards boundaries is a feature of the observations at the lower irradiation temperatures.

    Keywords:

    austenitic stainless steel, fuel cladding, grain boundaries, radiation-induced segregation, intergranular corrosion, analytical electron microscopy


    Author Information:

    Norris, DIR
    Nuclear Electric plc, Berkeley Nuclear Laboratories, Berkeley, Gloucestershire

    Baker, C
    Nuclear Electric plc, Berkeley Nuclear Laboratories, Berkeley, Gloucestershire

    Taylor, C
    AEA Technology, Northern Research Laboratories, Windscale, Cumbria

    Titchmarsh, JM
    AEA Technology, Harwell Laboratory, Oxfordshire


    Committee/Subcommittee: E10.08

    DOI: 10.1520/STP17898S