Deformation Stability of Al 7075/20%SiCp (63 μm) Composites during Hot Compression

Abstract

In Stir cast Al 7075/20%SiCp composites were subjected to compression testing at strain rates and temperatures ranging from 0.001 to 1.0 s–1 and from 300°C to 500°C respectively. And the associated microstructural transformations and instability phenomena were studied by observations of the optical electron microscope. The power dissipation efficiency and instability parameter were calculated following the dynamic material model and plotted with the temperature and logarithm of strain rate to obtain processing maps for strains of 0.5. The processing maps present the instability zones at higher strain rates. The result shows that with increasing strain, the instability zones enlarge. The microstructural examination shows that the interface separates even the particle cracks or aligns along the shear direction of the adiabatic shear band in the instability zones. The domain of higher efficiencies corresponds to dynamic recrystallization during the hot deformation. Using the processing maps, the optimum processing parameters of stain rates and temperatures can be chosen for effective hot deformation of Al 7075/20%SiCp composites.

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M. Rajamuthamilselvan and S. Ramanathan, "Deformation Stability of Al 7075/20%SiCp (63 μm) Composites during Hot Compression," Geomaterials, Vol. 2 No. 4, 2012, pp. 121-127. doi: 10.4236/gm.2012.24017.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1] H. R. Hafizpour, M. Sanjari and A. Simchi, “Analysis of the Effect of Reinforcement Particles on the Compressibility of Al-SiC Composite Powders Using a Neural Network Model,” Materials and Design, Vol. 30, 2009, pp. 1518-1523.
[2] N. Chawla, X. Deng and D. R. M. Schnell, “Thermal Expansion Anisotropy in Extruded SiC Particle Reinforced 2080 Aluminum Alloy Matrix Composites,” Materials Science and Engineering A, Vol. 426, 2006, pp. 314-322.
[3] D. B. Miracle, “Metal Matrix Composites—From Science to Technological Significance,” Composite Science and Technology, Vol. 65, 2005, pp. 2526-2540.
[4] S. Basavarajappa and G. Chandramohan, “Application of Taguchi Techniques to Study Dry Sliding Wear Behaviour of Metal Matrix Composites,” Materials and Design, Vol. 28, 2007, pp. 1393-1398.
[5] S. Ramanathan, R. Karthikeyan and G. Ganasen, “Development of Processing Maps for 2124Al/SiCp Composites,” Materials Science and Engineering A, Vol. 441, 2006, pp. 321-325.
[6] D. P. Mondal, S. Das and K. S. Suresh, “Compressive Deformation Behaviour of Coarse SiC Particle Reinforced Composite: Effect of Age-Hardening and SiC Content,” Materials Science and Engineering A, Vol. 460, 2007, pp. 550-560.
[7] Z. Xue, Y. Huang and M. Li, “Particle Size Effect in Metallic Materials: A Study by the Theory of Mechanism-Based Strain Gradient Plasticity,” Acta Materialia, Vol. 50, 2002, pp. 149-160.
[8] G. Ganesan, K. Raghukandan and R. Karthikeyan, “Development of Processing Map for 6061 Al/15%SiCp through Neural Networks,” Journal of Materials Processing Tech- nology, Vol. 166, 2005, pp. 423-429.
[9] S. V. S. N. Murty, B. N. Rao and B. P. Kashyap, “On the Hot Working Characteristics of 6061 Al-SiC and 6061-Al2O3 Particulate Reinforced Metal Matrix Composites,” Composites Science and Technology, Vol.63, 2003, pp. 119-135.
[10] E. Cerri, S. Spigarelli and E. Evangelista, “Hot Deformation and Processing Maps of Particulate-Reinforced 6061 + 20% Al2O3 Composite,” Materials Science and Engineering A, Vol. 324, 2002, pp. 157-161.
[11] K. S. See and T. A. Dean, “The Effects of the Disposition of SiC Particles on the Forgeability and Mechanical Properties of Co-Sprayed Aluminium-Based MMCs,” Journal of Materials Processing Technology, Vol. 69, 1997, pp. 58-67.
[12] V. C. Srivastava, V. Jindal and V. Uhlenwinkel, “Hot-De- formation Behaviour of Spray-Formed 2014 Al + SiCp Metal Matrix Composites,” Materials Science and Engineering A, Vol. 477, 2008, pp. 86-95.
[13] P. S. Robi and U. S. Dixit, “Application of Neural Networks in Generating Processing Map for Hot Working,” Journal of Materials Processing Technology, Vol. 142, 2003, pp. 289-294.
[14] Y. V. R. K. Prasad, “Processing Maps: A Status Report,” Material Engineering and Performance, Vol.12, No. 6, 2003, pp. 638-645.
[15] M. Q. Li, H. S. Pan, Y. Y. Lin and J. Luo, “High Temperature Deformation Behavior of Near Alpha Ti-5.6Al-4.8Sn-2.0Zr Alloy,” Journal of Materials Processing Technology, Vol. 183, 2007, pp. 71-76.
[16] D. Y. Cai, L. Y. Xiong, W. C. Liu, G. D. Sun and M. Yao, “Development of Processing Maps for a Ni-Based Superalloy,” Material Characterization, Vol. 58, 2007, pp. 941-946.
[17] Y. V. R. K. Prasad and S. Sasidhara, “Hot Working Guide,” ASM International, Materials Park, 1997.
[18] C. Y. Wang, X. J. Wang, H. Chang, K. Wu and M. Y. Zheng, “Processing Maps for Hot Working of ZK60 Magnesium Alloy,” Materials Science and Engineering A, Vol. 464, 2007, pp. 52-58.
[19] W .Wang, Y. Zhang, X. Zeng and W. Ding, “Characterization of Dynamic Recrystallisation in As-Homogenized Mg-Zn-Y-Zr Alloy Using Processing Map,” Journal of Material Science, Vol. 41, 2006, pp. 3603-3608.
[20] P. K. Sagar, “Effect of Alloying Elements and Microstructure on the Processing Parameters of α2 Aluminide Alloys,” Materials Science and Engineering A, Vol. 434, 2006, pp. 259-268.
[21] W. H. Yuan, J. Zhang, C. C. Zhang and Z. H. Chen, “Processing of Ultrahigh Strength SiCp/Al-Zn-Mg-Cu Composites,” Journal of Materials Processing Technology, Vol. 209, 2009, pp. 3251-3255.
[22] Y. C. Lin, M.-S. Chen and J. Zhong, “Prediction of 42 CrMo Steel Flow Stress at High Temperature and Strain Rate,” Mechanics Research Communications, Vol. 35, No. 3, 2008, pp. 142-150.
[23] Y. Liu, R. Hu, J. S. Li, H. C. Kou, H. W. Li, H. Chang and H. Z. Fu, “Characterization of Hot Deformation Behavior of Haynes230 by Using Processing Maps,” Journal of Materials Processing Technology, Vol. 209, 2009, pp. 4020-4026.
[24] Z. Yang, Y. C. Guo and J. P. Li, “Plastic Deformation and Dynamic Recrystallization Behaviors of Mg-5Gd- 4Y-0.5Zn-0.5Zr Alloy,” Materials Science and Engineering A, Vol. 485, 2008, pp. 487-491.
[25] S. Ramanathan, R. Karthikeyan and M. Gupta, “Devel- opment of Processing Maps for Al/SiCp Composite Using Fuzzy Logic,” Journal of Materials Processing Technology, Vol. 183, 2007, pp. 104-110.
[26] X. M. He, Z. Q. Yu and X. M. Lai, “A Method to Predict Flow Stress Considering Dynamic Recrystallization during Hot Deformation,” Computational Material Science, Vol. 44, 2008, pp. 760-764.
[27] P. Cavaliere and E. Evangelista, “Isothermal Forging of Metal Matrix Composites: Recrystallization Behaviour by Means of Deformation Efficiency,” Composites Science and Technology, Vol. 63, 2003, pp. 119-135.
[28] G. Ganesan, K. Raghukandan, R. Karthikeyan and B. C. Pai, “Development of Processing Maps for 6061 Al/15% SiCp Composite Material,” Materials Science and Engineering A, Vol. 369, 2004, pp. 230-235.
[29] Y. W. Yan, L. Geng and A. B. Li, “Experimental and Numerical Studies of the Effect of Particle Size on the De- formation of the Metal Matrix Composites,” Materials Science and Engineering A, Vol. 448, 2007, pp. 315-325.
[30] P. Cavaliere, E. Cerri and P. Leo, “Hot Deformation and Processing Maps of a Particulate Reinforced 2618Al2O3/ 20p Metal Matrix Composite,” Composites Science and Technology, Vol. 64, 2004, pp. 1287-1291.

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