Microstructure evaluations and mechanical properties of rheo-cast AZ80/Ca/Al 2 O 3 nanocomposite after extrusion process
| Autor: | Golamreza Ebrahimi, M. Torabi Parizi, Ali Habibolahzadeh |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Nanocomposite Yield (engineering) Materials science Mechanical Engineering Recrystallization (metallurgy) 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 01 natural sciences Mechanics of Materials 0103 physical sciences Ultimate tensile strength General Materials Science Extrusion Composite material 0210 nano-technology Eutectic system Tensile testing |
| Zdroj: | Materials Science and Engineering: A. 693:33-41 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/j.msea.2017.03.086 |
| Popis: | In current study, AZ80-0.5 wt%Ca-1.5 vol%Al 2 O 3 magnesium matrix nanocomposite was fabricated by rheo-casting method. After T4 heat treatment, the nanocomposite was exposed to extrusion at 450 °C with extrusion ratio of 12:1. Microstructure and mechanical results showed fragmentation of eutectic phase to fine particles, dynamic precipitations and recrystallization (DRX), strong basal plane texture and the increase of yield strength, yield anisotropy and hardness of nanocomposite after extrusion process. Yield and ultimate tensile strengths of the extruded nanocomposite were increased by 87.8% and 126.4%, where in compression test, strengths of the nanocomposite were developed by 61.9% and 35.6%, respectively. Moreover, tensile elongation of the extruded nanocomposite was improved by 530%, while its compressive elongation was decreased by 31.5%. After compressive test, reorientation of lattice structure was occurred by twin formation and higher density of twins was observed in extruded nanocomposite than as-cast one. |
| Databáze: | OpenAIRE |
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