Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10160038 | Acta Biomaterialia | 2013 | 7 Pages |
Abstract
The magnetic susceptibility of cold-rolled Zr-14Nb was evaluated to apply a new metallic medical device used for magnetic resonance imaging (MRI). The magnetic susceptibility of cold-rolled Zr-14Nb decreased up to the reduction ratio of 30%, then gradually decreased up to the ratio of 90%. Transmission electron microscopic observation revealed the strain-induced formation of Ï phase after cold rolling at the reduction ratio of 5%, indicating that the initial decrease in magnetic susceptibility was caused by the formation of the Ï phase. The Ï phase was saturated at the reduction ratio of 30%. The formation of the Ï phase could be explained on the basis of the increase in the Young's modulus and Vickers hardness of cold-rolled Zr-14Nb. The effect of texture formation on these properties was not obvious in the cold-rolled Zr-14Nb. Because of the strain-induced formation of the Ï phase, the magnetic susceptibility of Zr-14Nb can be reduced by cold rolling to as low as that of as-cast Zr-9Nb, which is one-third that of Ti and Ti alloys. Therefore, cold-workable Zr-14Nb with low magnetic susceptibility could be a promising alloy for medical devices under MRI.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Bioengineering
Authors
Ryota Kondo, Ryota Shimizu, Naoyuki Nomura, Hisashi Doi, Suyalatu Suyalatu, Yusuke Tsutsumi, Kazutaka Mitsuishi, Masayuki Shimojo, Kazuhiko Noda, Takao Hanawa,