Hot Deformation Behavior and Strain-Compensated Constitutive Equation of Nano-Sized SiC Particle-Reinforced Al-Si Matrix Composites
1
School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang 471023, China
2
Collaborative Innovation Center of Non-Ferrous Materials of Henan Province, Luoyang 471023, China
*
Author to whom correspondence should be addressed.
Materials 2020, 13(8), 1812; https://doi.org/10.3390/ma13081812
Received: 12 March 2020 / Revised: 4 April 2020 / Accepted: 7 April 2020 / Published: 11 April 2020
The hot deformation behavior of nano-SiCp/Al-Si composites was studied by isothermal compression tests at 470–530 °C and strain rates of 0.01–5 s−1. A strain-compensation constitutive model was developed with a Z parameter and an Arrhenius function, and its accuracy was verified by error analysis. The results show that the flow stress of the composites decreased with the increase in deformation temperature and the decrease in strain rate. The average activation energy for nano-SiC particle-reinforced Al-Si matrix composites was 277 kJ/mol, which was larger than the activation energy for self-diffusion of pure aluminum. The average relative error was calculated as 2.88%, indicating the strain-compensated constitutive equation could accurately predict the hot deformation behavior of nano-SiCp/Al-Si composites.
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Keywords:
nano-SiCp/Al-Si composites; hot deformation behavior; strain compensation; activation energy
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MDPI and ACS Style
Wang, Z.; Wang, A.; Xie, J.; Liu, P. Hot Deformation Behavior and Strain-Compensated Constitutive Equation of Nano-Sized SiC Particle-Reinforced Al-Si Matrix Composites. Materials 2020, 13, 1812. https://doi.org/10.3390/ma13081812
AMA Style
Wang Z, Wang A, Xie J, Liu P. Hot Deformation Behavior and Strain-Compensated Constitutive Equation of Nano-Sized SiC Particle-Reinforced Al-Si Matrix Composites. Materials. 2020; 13(8):1812. https://doi.org/10.3390/ma13081812
Chicago/Turabian StyleWang, Zhen; Wang, Aiqin; Xie, Jingpei; Liu, Pei. 2020. "Hot Deformation Behavior and Strain-Compensated Constitutive Equation of Nano-Sized SiC Particle-Reinforced Al-Si Matrix Composites" Materials 13, no. 8: 1812. https://doi.org/10.3390/ma13081812
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