Effect of Different Surface Treatments on Fatigue Life of NiTi Wires

Abstract:

Article Preview

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 et al., "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

Export:

Price:

$35.00

In order to see related information, you need to Login.

In order to see related information, you need to Login.