Effect of Solution Pretreatment on Homogeneity and Corrosion Resistance of Biomedical Mg-Zn-Ca Alloy Processed by High Pressure Torsion

详细信息    查看全文

• 作者：Congzheng Zhang ; Shaokang Guan ; Liguo Wang ; Shijie Zhu ; Jun Wang and Ruiming Guo
• 刊名：Advanced Engineering Materials
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：19
• 期：1
• 全文大小：2812K
• ISSN：1527-2648

文摘

Orthopedic Mg–Zn–Ca alloy is prepared by solution pretreatment and then processed by high pressure torsion (HPT). The results show that the second phases in solution treated (ST) alloy processed by HPT disperse uniformly. While the second phases in HPT-treated cast alloy without solution pretreatment are not completely fragmented and distributed non-uniformly. After five revolutions, the grain refinement is completed. The microhardness of the alloys is significantly improved after HPT, and the microhardness distribution is homogeneous in HPT-treated ST alloy. The corrosion resistance of HPT-treated ST alloy is more excellent than that of HPT-treated cast alloy in physiological environment.