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Understanding the Deformation and Fracture of Nitinol Endovascular Stents Using In Situ Synchrotron X‐Ray Microdiffraction
Author(s) -
Mehta A.,
Gong X.Y.,
Imbeni V.,
Pelton A. R.,
Ritchie R. O.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200601916
Subject(s) - materials science , synchrotron , deformation (meteorology) , characterization (materials science) , fracture (geology) , x ray , composite material , stent , stress (linguistics) , nanotechnology , optics , radiology , medicine , linguistics , philosophy , physics
Endovascular stents manufactured from superelastic Nitinol represent a major component in the fight against heart disease. However, accurate characterization of the stress/strain distributions, which govern the deformation and fracture behavior in such stents, is essential for their prolonged safe use in human arteries. Here we report the first direct synchrotron X‐ray microdiffraction measurements of the local strain field (see figure) of a stent‐like Nitinol component subjected to realistic multiaxial loading.