Summary
The form of the deformation map, as introduced by Ashby, is considered with emphasis on the region of high dislocation velocity (high stress). Of particular concern is the transition at high strain rates from a thermally activated to a linear viscous mode of deformation. New experimental data on aluminum and copper over a wide range in temperature and strain rates to 105 s-1 are presented. No evidence of the linear viscous mode was observed in these tests. Other data in the literature show a transition at strain rates on the order of 103 s-1.
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References
Ashby, M. F.: A first report on deformation mechanism maps. Acta Met., 20 (1972),887–897.
Klahn, D.; Mukherjee, A. K.; Dorn, J. E.: Strain rate effects. Second Int. Conf. on Strength of Metals and Alloys, ASM (1970), 951–982.
Davidson, D. L.; Lindholm, U. S.: Effect of barrier shape in the rate theory of metal plasticity. Institute of Physics Conference Series No. 21 (London) (1975), 124–137.
Lindholm, U. S.: High strain-rate tests. Techniques in Metals Research. Vol. V, Part 1, Interscience, New York (1971).
Seeger, A.: The generation of lattice defects by moving dislocations and its application to the temperature dependence of the flow stress of F.C.C. crystals. Phil. Mag. 46 (1955), 1194–1217.
Torzera, T.A.; Sherby, O. D.; Dorn, J. E.: Effect of strain rate and temperature on the plastic deformation of high purity aluminum. Trans. ASM, 49 (1957), 173–188.
Hauser, F. E.; Simmons, J. A.; Dorn, J. E.: Strain rate effects in plastic wave propagation. Response of Metals to High Velocity Deformation, Interscience, New York (1961), 93.
Kumar, A.; Kumble, R. G.: Viscous drag on dislocations at high strain rates in copper. J. Appl. Phys., 40, (1969), 3475–3480.
Eddington, J. W.: The influence of strain rate on the mechanical properties and dislocation substructure in deformed copper single crystals. Phil. Mag., 17 (1969), 1189–1206.
Campbell, J. D.: Temperature and rate effects in metal plasticity. Archives of Mechanics, 27 (1975), 407–416.
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© 1979 Springer-Verlag, Berlin/Heidelberg
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Lindholm, U.S. (1979). Deformation Maps in the Region of High Dislocation Velocity. In: Kawata, K., Shioiri, J. (eds) High Velocity Deformation of Solids. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-67208-8_3
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DOI: https://doi.org/10.1007/978-3-642-67208-8_3
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