Mechanical and Corrosion Properties of AZ31 Mg Alloy Processed by Equal-Channel Angular Pressing and Aging

I. A. Shahar, T. Hosaka, S. Yoshihara, B. J. Macdonald

研究成果: Conference article査読

14 被引用数 (Scopus)

抄録

Magnesium (Mg) has a good biocompatibility and thus a potential candidate for medical implants. However, the major drawback of Mg alloys consists of their fast corrosion rate, especially in the physiological pH 7.4environment thereby losing their mechanical integrity before the tissues have sufficient time to heal. Nevertheless, the use of Mg alloys as biodegradable implants has been promising, however their corrosion resistance should be enhanced. It has been known that equal-channel angular pressing (ECAP) process significantly affects the mechanical properties of Mg alloys but as the tensile strength rises, the corrosion performance deteriorates. Additionally, the secondary phase influences the corrosion resistance of magnesium-aluminum based alloys. The second-phase plays dual roles that depend on the amount and distribution of this phase. Therefore, in this study, we attempted to investigate the effect of grain refinement and second-phase redistribution on corrosion behavior and mechanical properties of AZ31 Mg alloy by changing the condition of ECAP process and subsequent aging. Per the optical microstructure observation, a fine and homogeneous second-phase microstructure appears to be a better anti-corrosion barrier, hence enhances the corrosion resistance of the alloy.

本文言語English
ページ(範囲)423-431
ページ数9
ジャーナルProcedia Engineering
184
DOI
出版ステータスPublished - 2017
外部発表はい
イベントAdvances in Material and Processing Technologies Conference, AMPT 2017 - Chennai, India
継続期間: 2017 12月 112017 12月 14

ASJC Scopus subject areas

  • 工学(全般)

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