Journal
JOURNAL OF BIOMEDICAL MATERIALS RESEARCH PART B-APPLIED BIOMATERIALS
Volume 69B, Issue 1, Pages 64-69Publisher
WILEY
DOI: 10.1002/jbm.b.10079
Keywords
Cu-Al-Mn-based shape memory alloy; guide wire; superelasticity; high stiffness; bainitic transformation
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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 degreesC. 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. (C) 2004 Wiley Periodicals, Inc.
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