Influence of notch shape and geometry during creep crack growth testing of TiAl intermetallic compounds

Akio Fuji, Masaaki Tabuchi, A. Toshimitsu Yokobori, Takeo Yokobori

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)

    Abstract

    In order to establish the optimum pre-crack shape and geometry for creep crack growth (CCG) testing of high-temperature brittle materials, several shapes of starter notches were evaluated experimentally on TiAl intermetallic compound. Fatigue pre-cracks are frequently inappropriate in these materials because they tend to promote out-of-plane crack growth in the lamellar structured TiAl materials. Based on the experimental results with several notch shapes and also an analytic assessment of stress distribution around notch-tip, a V-notched specimen is proposed as being optimum for generating creep crack growth data in lamellar structured TiAl. A procedure for machining the notches to minimize its effect on the CCG behavior is also outlined.

    Original languageEnglish
    Pages (from-to)23-32
    Number of pages10
    JournalEngineering Fracture Mechanics
    Volume62
    Issue number1
    DOIs
    Publication statusPublished - 1999 Jan

    Keywords

    • CT specimen
    • Creep crack growth
    • Fatigue pre-cracking
    • Notches
    • TiAl intermetallic compound

    ASJC Scopus subject areas

    • Materials Science(all)
    • Mechanics of Materials
    • Mechanical Engineering

    Fingerprint Dive into the research topics of 'Influence of notch shape and geometry during creep crack growth testing of TiAl intermetallic compounds'. Together they form a unique fingerprint.

    Cite this