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Effects of Changes in Crystal Structure by Plastic Deformation on Corrosion Resistance of Magnesium Alloys

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Abstract:

Magnesium alloys are promising for bioabsorbable stents due to their biocompatibility and degradability. Unlike conventional stainless steel stents that remain in the body and may cause complications, magnesium stents gradually degrade, reducing risks like restenosis and thrombosis. However, magnesium has low corrosion resistance, and its corrosion resistance needs to be improved. The crystal structure is one factor affecting the corrosion properties of metallic materials. Several studies have been conducted on the relationship between crystal structure and corrosion properties to improve magnesium's corrosion resistance. It is essential to elucidate the relationship between crystallographic factors and corrosion mechanisms, in the case of stents, plastic deformation during expansion results in the formation of fine crystal grains and twinning deformation. Therefore, the purpose of this study is to investigate the influence of refined grains and twinning on the corrosion properties of magnesium. Hot rolling and compression are used to refine the crystal grains and form twinning in experiments. The crystal structure can be observed by optical microscopy and SEM-EBSD. Following the evaluation of the crystal structure, immersion tests in brine are conducted to measure the mass loss and observe the corrosion behaviour.

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Periodical:

Solid State Phenomena (Volume 384)

Pages:

33-38

DOI:

https://doi.org/10.4028/p-hg3GOc

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Online since:

January 2026

Authors:

Ryo Hayasaka*, Shoichiro Yoshihara, Riku Mitome, Yuki Honma, Takuma Kishimoto, Tsuyoshi Furushima

Keywords:

Corrosion Resistance, Crystal Structure, Grain Size, Magnesium Alloys, Twinning

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© 2026 Trans Tech Publications Ltd. All Rights Reserved

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