Combined Corrosion and Fatigue Degradation of Nitinol Implants

Stepan Major; Stepan Hubalovsky; Josef Šedivý

doi:10.4028/www.scientific.net/AMR.712-715.474

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 712-715Combined Corrosion and Fatigue Degradation of...

Combined Corrosion and Fatigue Degradation of Nitinol Implants

Abstract:

Nitinol is metal alloy of nickel and titanium. It has wide range of applications. The most significant application is production of self-expanding stent-grafts, which are commonly used in vascular surgery. Stent-graft manufactures are confronted with two basic requirements: stents must have an infinite life; stents must be made of the thinnest wires us possible. Stent-graft failure or device fatigue remains major concern for stent-graft manufactures and researches. The stent-grafts are mechanically loaded, and also the device is placed in very aggressive environment. The corrosion stability of Nitinol is strongly dependent on the surface preparation: grinding, polishing, chemical etching. The paper deals with fatigue degradation of stent-grafts in corrosive environment.

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Periodical:

Advanced Materials Research (Volumes 712-715)

Pages:

474-477

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.712-715.474

Citation:

Cite this paper

Online since:

June 2013

Authors:

Stepan Major, Stepan Hubalovsky, Josef Šedivý

Keywords:

Corrosion, Finite Element Analysis (FEA), Hanks Physiological Solution, Nitinol, Stent-Graft

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