Characterising and representing small crack growth in an additive manufactured titanium alloy

Muhammad Shamir, Xiang Zhang, Abdul Syed

    Research output: Contribution to journalArticlepeer-review

    12 Citations (Scopus)
    135 Downloads (Pure)


    The purpose of the research is to apply the modified Hartman-Schijve equation for predicting small crack growth rate in additive manufactured titanium Ti-6Al-4V. Material constants in the equation were determined by long crack test data, and the threshold of the stress intensity factor range was set to a small value. A small fatigue crack test was conducted to validate the fitted equation. Predicted fatigue life of another specimen configuration under bending load agreed well with the test result. The work shows that it may be possible to represent both small and long crack growth rates by the modified Hartman-Schijve equation with its material constants being determined by long crack test.
    Original languageEnglish
    Article number107876
    Number of pages13
    JournalEngineering Fracture Mechanics
    Early online date10 Jul 2021
    Publication statusPublished - Aug 2021

    Bibliographical note

    Published by Elsevier Ltd. This is an open access article under the CC BY license




    • small/short cracks
    • EIDS
    • surface roughness
    • durability
    • fracture mechanics
    • finite element analysis
    • WAAM
    • Ti-6Al-4V


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