Development of medical guide wire of Cu-Al-Mn-base superelastic alloy with functionally graded characteristics
✍ Scribed by Sutou, Yuji ;Omori, Toshihiro ;Furukawa, Akihisa ;Takahashi, Yukinori ;Kainuma, Ryosuke ;Yamauchi, Kiyoshi ;Yamashita, Shuzo ;Ishida, Kiyohito
- Publisher
- John Wiley and Sons
- Year
- 2004
- Tongue
- English
- Weight
- 407 KB
- Volume
- 69B
- Category
- Article
- ISSN
- 0021-9304
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✦ Synopsis
A new type of medical guide wire with functionally graded hardness from the tip to the end was developed with the use of Cu-Al-Mn-based alloys. The superelasticity (SE) of the Cu-Al-Mn-based alloys in the tip is drastically improved by controlling the grain size, whereas the end of the wire is hardened using bainitic transformation by aging at around 200-400 degrees C. Therefore, the tip of the guide wire shows a superelasticity and its end has high stiffness. This guide wire with functionally graded characteristics shows excellent pushability and torquability, superior to that of the Ni-Ti guide wire.