Microstructure, mechanical and corrosion properties of Mg-Nd-Zn-Sr-Zr alloy as a biodegradable material

作者：Zhang X B^*; Zhang Y; Chen K; Ba Z X; Wang Z Z; Wang Q

来源：Materials Science and Technology, 2015, 31(7): 866-873.

DOI：10.1179/1743284714Y.0000000661

• Biodegradable magnesium alloy
• Microstructure
• Mechanical properties
• Corrosion behaviour

The Mg-2.5Nd-0.3Zn-0.1Sr-0.4Zr (wt-%) alloy was prepared by gravity casting. Solution treatment and extrusion were conducted. The microstructure, mechanical properties, and corrosion behaviour of the alloy under as cast, T4-treated, and as extruded conditions were evaluated using scanning electron microscope, tensile test, microhardometre, immersion test, and electrochemical test. The results show that the as extruded alloy exhibits the highest ultimate tensile strength (231 MPa), elongation (36.6%), and microhardness (57.8 HV). The as cast alloy shows the best corrosion resistance because the relative continuously distributed eutectic phase with noble corrosion potential acts as a corrosion barrier. The as extruded Mg-Nd-Zn-Sr-Zr alloy with high ductility and good corrosion resistance is desirable for preparing biodegradable implants.

• 出版日期2015-5
• 单位南京工程学院