The effect of pressure and pouring temperature on the porosity, microstructure, hardness and yield stress of AA2024 aluminum alloy during the squeeze casting process
| Autor: | A. Jahangiri, S. P. H. Marashi, M. Mohammadaliha, V. Ashofte |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Squeeze casting Materials science Metallurgy Alloy Metals and Alloys chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Industrial and Manufacturing Engineering Grain size Computer Science Applications chemistry Aluminium Modeling and Simulation Scientific method 0103 physical sciences Ceramics and Composites engineering 0210 nano-technology Grain structure Porosity |
| Zdroj: | Journal of Materials Processing Technology. 245:1-6 |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/j.jmatprotec.2017.02.005 |
| Popis: | The effect of pressure and pouring temperature on the microstructure, porosity, hardness and yield stress of AA2024 aluminum alloy during squeeze casting process was investigated. At a constant pouring temperature (700 °C), by increasing the applied pressure up to 140 MPa, the hardness increased from 125 HBN to 152 HBN while the yield stress increased from 235 MPa to 340. Moreover, by increasing the applied pressure (to 140 MPa) and reducing the pouring temperature (at 700 °C), the DAS size and the porosity diameter decreased to 12.5 and 0.25 μm, respectively. Thus, the density increased to 2.75 (g/cm3). At a pressure of 140 MPa and 700 °C, an ultra-fine grain structure with an average grain size of 80 nm was observed. At squeezing pressures greater than 70 MPa, the effect of pouring temperature was less important. |
| Databáze: | OpenAIRE |
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