Journal
MATERIALS TECHNOLOGY
Volume 31, Issue 4, Pages 210-215Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1179/1753555715Y.0000000043
Keywords
Biomaterials; Magnesium alloys; Double extrusion and aging processes; Mechanical properties; Corrosion resistance
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Funding
- National Natural Science Foundation of China [51301089]
- Natural Science Foundation of Jiangsu Province [BK20130745]
- Innovative Foundation Project of Nanjing Institute of Technology [N20150206]
- Qing Lan Project of Jiangsu Province
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In order to refine and homogenise microstructure and to improve mechanical properties of the magnesium alloys for biomedical application, the Mg-2.0Nd-0.1Zn-0.4Zr (wt-%, NZ20K) alloy with low amount of alloying elements was processed by double extrusion and aging processes (DEAP). Compared to the NZ20K alloy after once extrusion and aging processes (OEAP), the microstructure becomes finer and more homogeneous, and the elongation is raised up similar to 121% by DEAP. Moreover, the yield strength and ultimate tensile strength are improved similar to 27 and similar to 16% respectively. Additionally, the corrosion rate of the NZ20K alloy by the DEAP is a little slower than that of the OEAP. It can be concluded that the mechanical properties, as well as the corrosion resistance of the NZ20K alloy, are able to be enhanced by the double extrusion and aging processes.
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