Publication detail

Nonlinearity analysis of nitinol stents and wires

Jan Havranek, Petr Sedlak, Josef Sikula, Aleš Bezrouk, Josef Hanuš, Jiří Záhora

Original Title

Nonlinearity analysis of nitinol stents and wires

English Title

Nonlinearity analysis of nitinol stents and wires

Type

conference paper

Language

en

Original Abstract

Superelastic nickel-titanium (Ni-Ti), or nitinol, alloys are becoming integral to the design of a variety of new medical products. We are investigating electrical properties of this unique alloy. Nonlinearity and noise measurements are used to obtain information on sample quality structure and their reliability. The nonlinearity measuring method is based on distortion of the first harmonic signal by dislocations cracks and other defects. Result is that in vicinity of the cracks the value of current is distorted and so we are expecting that third harmonic voltage can be used as quality and reliability indicator. In other words, the transmission is linear if an ac voltage is applied to a component and the current paths consist of perfect elements with increasing conductivity. The resulting current will then show a true picture of the applied signal. If the elements on the other hand are imperfect, the current will be distorted and generate a voltage inside the component that will produce a distorted signal.

English abstract

Superelastic nickel-titanium (Ni-Ti), or nitinol, alloys are becoming integral to the design of a variety of new medical products. We are investigating electrical properties of this unique alloy. Nonlinearity and noise measurements are used to obtain information on sample quality structure and their reliability. The nonlinearity measuring method is based on distortion of the first harmonic signal by dislocations cracks and other defects. Result is that in vicinity of the cracks the value of current is distorted and so we are expecting that third harmonic voltage can be used as quality and reliability indicator. In other words, the transmission is linear if an ac voltage is applied to a component and the current paths consist of perfect elements with increasing conductivity. The resulting current will then show a true picture of the applied signal. If the elements on the other hand are imperfect, the current will be distorted and generate a voltage inside the component that will produce a distorted signal.

RIV year

2006

Released

10.11.2005

Location

Znojmo

ISBN

80-214-3053-2

Book

Defektoskopie 2006

Pages from

17

Pages to

21

Pages count

5

BibTex


@inproceedings{BUT16318,
  author="Jan {Havránek} and Josef {Šikula} and Petr {Sedlák} and Aleš {Bezrouk} and Jiří {Záhora} and Josef {Hanuš}",
  title="Nonlinearity analysis of nitinol stents and wires",
  annote="Superelastic nickel-titanium (Ni-Ti), or nitinol, alloys are becoming integral to the design of a variety of new medical products. We are investigating electrical properties of this unique alloy. 
Nonlinearity and noise measurements are used to obtain information on sample quality structure and their reliability. The nonlinearity measuring method is based on distortion of the first harmonic signal by dislocations cracks and other defects. Result is that in vicinity of the cracks the value of current is distorted and so we are expecting that third harmonic voltage can be used as quality and reliability indicator. In other words, the transmission is linear if an ac voltage is applied to a component and the current paths consist of perfect elements with increasing conductivity. The resulting current will then show a true picture of the applied signal. If the elements on the other hand are imperfect, the current will be distorted and generate a voltage inside the component that will produce a distorted signal.",
  booktitle="Defektoskopie 2006",
  chapter="16318",
  year="2005",
  month="november",
  pages="17",
  type="conference paper"
}