Abstract
In recent years the shock deformation properties of a precipitation-hardened aluminum alloy (6061-T6) have been investigated extensively with time-resolved wave profile gauges. Studies have revealed complicating features of the shock deformation process not easily explained by existing theories of plastic deformation. Specifically, unusual behavior in the dynamic hardness or strength, post-shock hardness, steady wave viscosity, and post-shock microstructure has been observed over the shock pressure range of range of 1–15 GPa. The deformation structure suggests that microscopic heterogeneity in the deformation and temperature state during dynamic compression may be responsible for the observed effects. We have undertaken a study to correlate the shock compression and quasistatic deformation of 6061-T6 aluminum. Recovered specimens which have been shock loaded are examined metallurgically, and results are compared with both static and dynamic mechanical property measurements. Illuminating correlations are emerging from this study, although an unambiguous determination of the importance of heterogeneous effects is yet to be achieved. A modeling effort of dynamic deformation in aluminum based on heterogeneous deformation and adiabatic thermal trapping is being pursued to guide the experimental effort.
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© 1983 Plenum Press, New York
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Grady, D.E., Asay, J.R., Rohde, R.W., Wise, J.L. (1983). Microstructure and Mechanical Properties of Precipitation Hardened Aluminum Under High Rate Deformation. In: Mescall, J., Weiss, V. (eds) Material Behavior Under High Stress and Ultrahigh Loading Rates. Sagamore Army Materials Research Conference Proceedings, vol 29. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-3787-4_5
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DOI: https://doi.org/10.1007/978-1-4613-3787-4_5
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