Damage mechanisms and fracture toughness of GlidCop® CuAl25 IG0 copper alloy

Seppo Tähtinen (Corresponding Author), Anssi Laukkanen, Bachu Singh

    Research output: Contribution to journalArticleScientificpeer-review

    11 Citations (Scopus)

    Abstract

    Crack nucleation and growth behaviour are important parameters in deciding about the applicability of the dispersion strengthened copper alloy CuAl25 in components such as the first wall and divertor in ITER. The effective strain to fracture of notched tensile specimens decreased with increasing stress state triaxiality and with increasing temperature at constant constraint level following the Rice and Tracey model for void growth. In three point bend tests, the strain for stable crack initiation decreased significantly with increasing temperature. The CuAl25 alloy failed by a ductile microvoid mechanism where extensive void nucleation occurred at very low strains at grain boundaries with increasing stress state triaxiality. At elevated temperatures the fracture surface morphology changed from microvoid to intergranular fracture in three-point bend tests.
    Original languageEnglish
    Pages (from-to)1028 - 1032
    Number of pages5
    JournalJournal of Nuclear Materials
    Volume283-287
    Issue numberPart 2
    DOIs
    Publication statusPublished - 2000
    MoE publication typeA1 Journal article-refereed
    Event9th International Conference on Fusion Reactor Material, ICFRM-9 - Colorado Springs, United States
    Duration: 10 Oct 199915 Oct 1999

    Keywords

    • ProperTune

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