Strain rate and test temperature dependence on the flow properties of La2O3-doped tungsten

I. Uytdenhouwen, R. Chaouadi, J. Linke, V. Massaut, G. Van Oost

    Research outputpeer-review

    Abstract

    Tungsten and tungsten alloys are promising metals as protective materials for the armour in future fusion reactors. These metals exhibit the highest melting point, superior thermo-mechanical properties, low erosion and moderate neutron activation properties. The main drawback is their intrinsic brittleness at room temperature and their low recrystallization temperature. During thermal shock events in ITER, tungsten materials will exhibit various crack formations and failure mechanisms. The extensive heat loads on the surface of the material will create high thermal stresses, huge temperature rises and therefore large strain rates in the subsurface layers. This paper deals with the flow properties combining both temperature and strain rate effects of a lanthanum oxide dispersion strengthened tungsten material and the influence of grain orientation on its ductility. Promising results were obtained using a yield strength model based on a thermally-activated slip process that rationalizes the data.

    Original languageEnglish
    Title of host publication1st International Conference on New Materials for Extreme Environments
    Pages319-325
    Number of pages7
    Volume59
    DOIs
    StatePublished - Jan 2009
    Event1st EXTREMAT (Materials under extreme environments) conference - San Sebastian
    Duration: 2 Jun 20084 Jun 2008

    Publication series

    NameAdvanced Materials Research
    PublisherTTP - Trans Tech Publications
    ISSN (Print)1022-6680

    Conference

    Conference1st EXTREMAT (Materials under extreme environments) conference
    Country/TerritorySpain
    CitySan Sebastian
    Period2008-06-022008-06-04

    ASJC Scopus subject areas

    • General Engineering

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