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Figure Captions

7. J. M. Rickman, S. R. Phillpol, D. Wolf, D. L. Woodraska and S. Yip, J. Mater. Res.,6 (1991) 2291.

8. C. Molteni, G. P. Francis, M. C. Payne and V. Heine, Mater. Sci. Eng., B37 (1996) 121. Figure 1: Schematic of the mechanical behavior of superplastic materials [].

Figure 2: Polycrystalline model based on the self-consistent relation [, ].

Figure 3: Micromechanical prediction of the flow stress-true strain rate behavior of Al7475 aluminum alloy.

Figure 4: Micromechanical prediction of the flow stress-true strain rate behavior of Al2090 aluminum alloy.

Figure 5: Micromechanical prediction of the flow stress-true strain rate behavior of an Al-Zn-Mg-Cu alloy.

Figure 6: Independent prediction of the flow stress-true strain rate behavior of Al7475 aluminum alloy with different grain sizes.

Figure 7: Independent prediction of strain rate sensitivity, m curve of Al7475 alloy with different grain size and the corresponding experimental data.

Figure 8: Independent prediction of m curve of Al-Zn-Mg-Cu alloy from the micromechanical model and the corresponding experimental data [].

Figure 9: Dependence of micro-level threshold stress on temperature.

Figure 10: Schematic of grain size and temperature ranges predicted by the micromechanical models for Al7475 alloy.



Ping Dang
Wed Mar 12 14:52:36 EST 1997