STP529: Effects of Irradiation on the Tensile and Structural Properties of FV548 Stainless Steel

    Watkin, JS
    Higher scientific officer and section leader, United Kingdom Atomic Energy Authority, The Reactor Group, Reactor Fuel Element Labs., Preston, England

    Shepherd, JP
    Lecturer, Southall Technical College, London,

    Standring, J
    Higher scientific officer and section leader, United Kingdom Atomic Energy Authority, The Reactor Group, Reactor Fuel Element Labs., Preston, England

    Pages: 20    Published: Jan 1973


    Abstract

    The tensile properties of the columbium-stabilized austenitic steel FV548 have been investigated after irradiation in a thermal reactor up to fluences of 4 · 1020 n/cm2 (thermal) and in a fast reactor up to fluences of 2.7 · 1022 n/cm2 (total).

    The parameters that have been studied include the effects of irradiation temperature, covering the temperature range 550 to 750 C (1022 to 1382 F); the effects of solute level produced by increasing the solution heat-treatment temperature from 950 to 1300 C (1742 to 2372 F); and the effects of pre- and postirradiation aging. Testing has been carried out over the strain-rate range 5 · 10−4 to 5 · 10−6 per second and at temperatures between 550 and 750 C (1022 and 1382 F). The microstructures obtained during irradiation have also been investigated and the results correlated with the tensile properties. Suggested mechanisms for the effects observed are discussed.

    Keywords:

    irradiation, radiation effects, stainless steels, tension tests, carbide precipitation, electron microscopy, helium, bubbles, fast neutrons


    Paper ID: STP35472S

    Committee/Subcommittee: E10.07

    DOI: 10.1520/STP35472S


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