Effect of cold rolling on the magnetic susceptibility of Zr-14Nb alloy

Ryota Kondo, Ryota Shimizu, Naoyuki Nomura, Hisashi Doi, Suyalatu, Yusuke Tsutsumi, Kazutaka Mitsuishi, Masayuki Shimojo, Kazuhiko Noda, Takao Hanawa

研究成果: Article査読

25 被引用数 (Scopus)

抄録

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 ω 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 ω phase. The ω phase was saturated at the reduction ratio of 30%. The formation of the ω 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 ω 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.

本文言語English
ページ(範囲)5795-5801
ページ数7
ジャーナルActa Biomaterialia
9
3
DOI
出版ステータスPublished - 2013 3

ASJC Scopus subject areas

  • バイオテクノロジー
  • 生体材料
  • 生化学
  • 生体医工学
  • 分子生物学

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