Full-Field Measurements of Fracture Initiation and Crack Growth in Superelastic Nitinol

    Volume 6, Issue 2 (February 2009)

    ISSN: 1546-962X

    CODEN: JAIOAD

    Published Online: 13 February 2009

    Page Count: 5


    Perry, Kenneth E.
    ECHOBIO LLC, Bainbridge Island, WA

    Labossiere, Paul E.
    ECHOBIO LLC, Bainbridge Island, WA

    (Received 2 June 2008; accepted 1 December 2008)

    Abstract

    We present results for full-field measurements of crack tip deformation fields in Nitinol using high sensitivity moiré interferometry. Three fatigue loading scenarios are examined illustrating the effect of stress induced martensite transformations at the tip of the crack. Understanding the behavior of fatigue crack growth is paramount to the successful use of this highly complex material response, especially for such application as implantable medical devices. The results demonstrate the sensitivity of heterogeneous phase transformations on the crack growth behavior.


    Paper ID: JAI101874

    DOI: 10.1520/JAI101874

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    Author
    Title Full-Field Measurements of Fracture Initiation and Crack Growth in Superelastic Nitinol
    Symposium Presented at the ASTM Second Symposium on Fatigue and Fracture of Medical Metallic Materials and Devices, 2008-05-07
    Committee E08