Local deformation energy and void formation behavior in 16%Cr ferritic steel

Osamu Furukimi, Sho Niigaki, Naoya Yamada, Masatoshi Aramaki, Satoshi Oue, Yoshimasa Funakawa

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    12 Citations (Scopus)

    Abstract

    Tensile tests of 16mass%Cr bearing ferritic steels were performed in order to investigate the effect of the mean interparticle spacing (λ) on the local deformation energy. λ of Cr precipitates was changed from 3. 3 to 5. 1 μm. The amounts of Cr precipitates in the specimens tested were controlled to be the same level. The local deformation energy was increased with increasing λ in the specimens without a notch, while the local deformation energy does not depend on λ for the notched specimens. AsB (Angle selective Backscattered Electron Detector) images of voids beneath the fracture surface showed that the difference of the local deformation energy dependence on λ between notchless and notched specimens was due to the void coalescence processes. This finding reveals that the local deformation energy is influenced by the stress triaxiality through the void coalescence behavior.

    Original languageEnglish
    Pages (from-to)60-69
    Number of pages10
    JournalTetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan
    Volume99
    Issue number1
    DOIs
    Publication statusPublished - 2013

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics
    • Physical and Theoretical Chemistry
    • Metals and Alloys
    • Materials Chemistry

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