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Application of Ultrasonic Nano Crystal Surface Modification into Nitinol Stent Wire to Improve Mechanical Characteristics

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Fig.  1.  Importance  of  surface  modi- modi-fication  to  be  applied  to  Nitinol  alloys  [Dr
Fig.  2.  UNSM  mechanism  for  inducing  severe  plastic  defor- defor-mation.2. 초음파 나노표면 개질 기술(Ultrasonic Nanocrystalline Surface Modification)    본  기술은  전기적  에너지를  압전소자인  초음파  진동자(PZT)를 이용하여 기계적 진동 에너지로 변환하는 과정을 거쳐서 진동 horn을 통한 탄성진동파 전달 및 증폭시킨 진동에너지를 금
Table 2. XRD results of surface stress and FWHM of Nitinol  wire.
Fig.  5.  Scanning  electron  micrographs  of  Nitinol  wire.  (a)  As-drawn,  (b)  UNSM.
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