Effects of minor Y addition on microstructure and mechanical properties of Mg–Nd–Zn–Zr alloy
| Autor: | Wendong Cui, Liang Zhang, Yushi Chen, Guohua Wu, Haohao Zhang, Wencai Liu |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Arrhenius equation Materials science Mechanical Engineering Alloy 02 engineering and technology Atmospheric temperature range engineering.material 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Casting symbols.namesake Precipitation hardening Mechanics of Materials Phase (matter) 0103 physical sciences engineering symbols General Materials Science Elongation Composite material 0210 nano-technology |
| Zdroj: | Journal of Materials Research. 32:3712-3722 |
| ISSN: | 2044-5326 0884-2914 |
| Popis: | Microstructure and mechanical properties of Mg-0.43Nd-xY-0.08Zn-0.11Zr (x = 0, 0.03, 0.06, and 0.12 at.%) alloys were investigated. The results indicated that Mg24Y5 phase was formed in the as-cast Y-containing alloys, the grains were refined and the amount of needle-like Mg12Nd phase in the α-Mg grain interior was increased with increasing Y addition. After solution treatment, the Mg24Y5 phase and needle-like Mg12Nd phase nearly completely dissolved into the α-Mg matrix and long-rod-like Zn2Zr3 phase occurred. The amount of Zn2Zr3 phase was increased with increasing Y content after age treatment. Mg-0.43Nd-0.12Y-0.08Zn-0.11Zr alloy exhibited the best combination of strength and elongation in all conditions, especially in the temperature range of 200–300 °C, and an Arrhenius model was established to study the plastic flow behavior. The improvement in mechanical properties was attributed to the grain refining, solution strengthening and enhanced precipitation hardening of Zn2Zr3 phase and β-type phase. |
| Databáze: | OpenAIRE |
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