Hot Deformation Behavior of Al₂O₃/Cu-10vol%WC Composite

Abstract:

The hot deformation behavior of the Al₂O₃/Cu-10vol%WC composite is investigated by isothermal compression test on a Gleeble 1500D thermal-mechanics simulator at the temperature ranges from 350°C to 750°C and the strain rate ranges from 0.01s^-1 to 5s^-1. The results show that high-temperature flow stress-strain curves of Al₂O₃/Cu-WC composites have typical features of the softening mechanism of dynamic recovery and dynamic recrystallization. The peak stress increases with the decreasing of deformation temperature or the increasing of strain rate. The hyperbolic-sine type equation shows good agreement with the experimental stress. Upon the basis of the above experimental results, the activation energy of the composite is calculated as 208.34kJ/mol.

• Periodical: Applied Mechanics and Materials (Volumes 117-119)
• Pages: 921-924
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.117-119.921
• Online since: October 2011
• Authors: Jiang Feng, Bao Hong Tian, Yong Liu
• Keywords: Al₂O₃/Cu-10vol%WC, Constitutive Equation, Deformation Behavior, Microstructure

References

[1] P.K. Deshpande, R.Y. Lin: Materials Science and Engineering A, Vol. 418 (2006), pp.137-145

[2] P.K. Deshpande, J.H. Li and R.Y. Lin: Materials Science and Engineering A, Vol. 429 (2006), pp.58-65

[3] M. Wang, L. Zhang and X. Liu: Journal of Materials Science &Engineering, Vol. 21(2003), pp.528-530.

[4] N. Zhao, F. Zhou and M. Chen: Powder Metallurgy Technology, Vol. 18(2000), pp.265-269.

[5] C. M. Sellars, W. J. Mctegart: Acta Metall., Vol. 14(1966), pp.1136-1138.

[6] C. M. Sellars. Mater. Sci Technol., Vol. 16(1990), pp.1072-1078.

[7] C. Bruni, A. Forcellese and F. Gabrielli. Journal of Materials Processing Technology, Vol. 125-126(2002), pp.242-247