双向拉伸改善Mg-Zn-Nd合金的力学性能和耐腐蚀性能( Improvement of mechanical property and corrosion resistance of Mg-Zn-Nd alloy by bi-direction drawing )

GAB Ming YB Ke LT B MB Zheng

Mg–Zn–Nd alloy is a promising biodegradable metal material for surgical staples during the reconstruction of digestive tract due to its good biocompatibility and suitable mechanical properties. However, its deformation property and corrosion resistance should be improved to make better safety and effectiveness of staples. In the present study, bi-direction drawing was adopted to maintain the initial texture characteristics, and improve mechanical property and corrosion resistance of Mg–2Zn–0.5Nd alloy. The results showed that the microstructure after bi-direction did not change too much, but the texture could maintain its initial characteristics. The ductility of the alloy with 60% accumulative area reduction after bi-direction drawing was increased by 70%, indicating that an outstanding deformation property of Mg–Zn–Nd alloy can be obtained by bi-direction drawing. The corrosion resistance was also improved after bi-direction drawing compared with that under single direction drawing.

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