Understanding the deformation and fracture of nitinol endovascular stents using in situ synchrotron X-ray microdiffraction

被引：32
|
作者：
Mehta, Apurva
Gong, Xiao-Yan
Imbeni, Valentina
Pelton, Alan R.
Ritchie, Robert O. [1 ]
机构：
[1] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA
[2] Stanford Univ, SSRL SLAC, Menlo Pk, CA 94025 USA
[3] Med Implant Mech LLC, Fremont, CA 94539 USA
[4] SRI Int, Menlo Pk, CA 94025 USA
[5] Nitinol Devices & Components, Fremont, CA 94539 USA
来源：
ADVANCED MATERIALS | 2007年 / 19卷 / 09期
关键词：
D O I：
10.1002/adma.200601916
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
引用
收藏
页码：1183 / +
页数：5
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