Paper Title:
Effect of Different Surface Treatments on Fatigue Life of NiTi Wires
  Abstract

Surface preparation is potentially important to the mechanical and biomedical properties of NiTi shape memory alloys. In this paper, the effect of surface preparation on fatigue life of a Ti-55.2wt%Ni alloy has been studied. Surface of the NiTi wires is prepared by five methods of chemical etching, electropolishing, oxidizing, mechanical polishing A and mechanical polishing B, and then examined by the self-developed fatigue evaluation device. Under scanning electron microscopy (SEM) the fractures of all specimens show dimple morphology. It is found that compared with the samples after chemical treatment, mechanical polishings and thermal oxidation, electropolished sample has longer fatigue life for its lower surface roughness despite a lack of face-hardened layer.

  Info
Periodical
Materials Science Forum (Volumes 561-565)
Main Theme
Edited by
Young Won Chang, Nack J. Kim and Chong Soo Lee
Pages
2265-2268
DOI
10.4028/www.scientific.net/MSF.561-565.2265
Citation
W. D. Miao, X. J. Mi, H. C. Li, B. D. Qi, "Effect of Different Surface Treatments on Fatigue Life of NiTi Wires", Materials Science Forum, Vols. 561-565, pp. 2265-2268, 2007
Online since
October 2007
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Price
$32.00
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