中文摘要：

biomagnesium 合金被认为由于它的好机械相容性，生物相容性，生物安全和可被细菌破坏的特征是最潜在的可被细菌破坏的金属材料之一。然而，在生理的环境和低机械性质的高降级率的二个主要问题阻止 biomagnesium 合金的发展。在现在的工作， Mg-Zn-Y-Nd 合金的样品被周期的挤出压缩(CEC ) 和相等的隧道准备尖紧迫(ECAP ) 。微观结构，合金的机械性质和它在模仿的身体液体(SBF ) 的腐蚀行为被评估。结果表明那 Mg-Zn-Y-Nd 合金与测微计尺寸和缩放 nano 的秒阶段的同类的分发由 equiaxial 罚款谷物结构组成，它被动态再结晶在 ECAP 和 CEC 期间引起。合金的腐蚀抵抗被改进。张力并且腐蚀抵抗被改进，特别处理合金展览制服腐蚀表演和减少的腐蚀评价。这将作为脉管的 stent 申请为 Mg-Zn-Y-Nd 合金提供理论地面。

英文摘要：

The biomagnesium alloys have been considered to be one of the most potential biodegradable metal materials due to its good mechanical compatibility, biological compatibility, biological security and biodegradable characteristics. However, the two major problems of high degradation rates in physiological environment and low mechanical properties prevent the development of biomagnesium alloys. In the present work, the samples of Mg-Zn-Y-Nd alloy were prepared by cyclic extrusion compression （CEC） and equal channel angular pressing （ECAP）. The microstructures, mechanical properties of alloy and its corrosion behavior in simulated body fluid （SBF） were evaluated. The results reveal that Mg-Zn-Y-Nd alloy consists of equiaxial fine grain structure with the homogeneous distribution of micrometer size and nano-sized second phase, which was caused by the dynamic recrystallization during the ECAP and CEC. The corrosion resistance of alloy was improved. The tensile and corrosion resistance were improved, especially the processed alloy exhibit uniform corrosion performances and decreased corrosion rate. This will provide theoretical ground for Mg-Zn-Y-Nd alloy as vascular stent application.