Hot Deformation Behaviors of SiCp/2024 Aluminum Composites

Abstract:

The hot deformation behaviors of 30%SiCp/2024 aluminum alloy composites was studied by hot compression tests using Gleeble-1500 thermomechanical simulator at temperatures ranging from 350-500 °C under strain rates of 0.01-10 s-1. The true stress-true strain curves were obtained in the tests. Constitutive equation and processing map were established. The results show that the flow stress decreases with the increase of deformation temperature at a constant strain rate, and increases with the increase of strain rate at constant temperature, indicating that composite is a positive strain rate sensitive material. The flow stress behavior of composite during hot compression deformation can be represented by a Zener-Hollomon parameter in the hyperbolic sine form. Its activation energy for hot deformation Q is 153.251 kJ/mol. The optimum hot working conditions for this material are suggested.

• Periodical: Advanced Materials Research (Volume 833)
• Pages: 271-275
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.833.271
• Online since: November 2013
• Authors: Shi Ming Hao, Jing Pei Xie*
• Keywords: Constitutive Equations, Metal Matrix Composite (MMC), Powder Metallurgy, Processing Maps

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