Effects of Dy, Sr and Die Casting on Microstructure, Mechanical and Corrosion Properties of Mg-Dy-Sr-Nd-Zr Alloys
| Autor: | Yutian Ding, Pang Xin, Xunyan Yin, Shiwen Hu, Dexue Liu |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Mechanical Engineering Alloy Metallurgy 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Die casting Grain size Corrosion Mechanics of Materials 0103 physical sciences Ultimate tensile strength engineering General Materials Science Elongation 0210 nano-technology |
| Zdroj: | Journal of Materials Engineering and Performance. 26:3983-3992 |
| ISSN: | 1544-1024 1059-9495 |
| DOI: | 10.1007/s11665-017-2850-0 |
| Popis: | By adding 2, 6 and 10 wt.% Dy and 0.5, 1.5 and 2 wt.% Sr elements to Mg-2.4Nd-0.5Zr alloys and adopting die-casting process for biomedical Mg-10Dy-0.5Sr-2.4Nd-0.5Zr alloys, the effects of Dy and Sr elements and die-casting process on the microstructure, mechanical properties and corrosion resistance of Mg-Dy-Sr-Nd-Zr alloys were investigated. The new biomedical Mg-10Dy-0.5Sr-2.4Nd-0.5Zr alloys were designed, and the grain size of the as-cast new alloy was refined to ~70 μm and distributed equably. The ultimate tensile strength increased with increasing Dy content and decreasing Sr content. The corrosion rate decreased firstly and then increased with increasing Dy content and decreased with increasing Sr content. By adjusting the content of Sr and Dy, the ultimate tensile strength of as-cast new Mg-10Dy-0.5Sr-2.4Nd-0.5Zr alloys increased to 203 MPa, elongation was 7.4%, and the corrosion rate decreased to 0.48 mm/a. The elongation rate increased to 10.2% after the new biomedical alloys were processed by die casting with an refine-grained microstructure of ~18 μm, meanwhile the ultimate tensile strength decreased to 180 MPa, and the corrosion rate was 1.29 mm/a. |
| Databáze: | OpenAIRE |
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