The Hot Workability of SiCp/2024 Al Composite by Stir Casting |
| |
Authors: | S Y Wang Q Tang D J Li J X Zou Q B Ouyang |
| |
Affiliation: | National Engineering Research Center of Light Alloys Net Forming and State Key Laboratory of Metal Matrix Composite, Shanghai Jiao Tong University, Shanghai, P. R. China |
| |
Abstract: | The hot workability of SiCp/2024 Al composite was explored by conducting hot compression simulation experiments on Gleeble-3500 under temperatures of 300–500 °C and strain rates of 10?3–1 s?1. Constitutive equation was developed through hyperbolic sine function, and the activation energy was calculated to be 151 kJ mol?1. The hot processing maps referring to dynamic material model were drawn in a true strain range from ?0.2 to ?0.8. At the strain of ?0.8, the recommended regions in processing map contained two domains: superplastic domain (500 °C, 10?3 s?1) with an efficiency of about 0.72 and DRX domain (500°C, 1 s?1) with an efficiency of about 0.45. Together with macrostructure and microstructure observations, it was suggested to remove the DRX region. |
| |
Keywords: | Composite Compression Constitutive Flow Hot-processing Workability |
|
|