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

Kenneth Perry; Paul Labossiere

doi:10.1520/STP48990S

SYMPOSIA PAPER Published: 01 January 2010

STP48990S

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

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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.

Author Information

Perry, Kenneth, E.

ECHOBIO LLC, Bainbridge Island, WA, USA

Labossiere, Paul, E.

ECHOBIO LLC, Bainbridge Island, WA, USA

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Details

Developed by Committee: E08

Pages: 92–98

DOI: 10.1520/STP48990S

ISBN-EB: 978-0-8031-8418-3

ISBN-13: 978-0-8031-7501-3

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

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