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Energy dissipation efficiency in aluminum dependent on monotonic flow curves and dynamic recovery

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Abstract

In the hot working of Al, the flow curves are usually monotonic, reaching saturation at a lower strain εs and stress σs as temperature rises and strain rate declines. Microstructural examination confirms that the dislocation density rises to a steady-state level through formation of an equiaxed subgrain substructure with constant dimension that is larger for lower stress. The energy dis-sipation efficiency estimated by dynamic materials modeling for flow curves of the above type is the result of dynamic recovery, not of dynamic recrystallization, which is characterized by flow curves with a peak and marked softening to a steady-state regime.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Concordia University, H3G IM8, Montreal, PQ, Canada

    H. J. McQueen (Professor)

  2. Department of Mechanics, University of Ancona, 60131, Ancona, Italy

    E. Evangelista (Professor)

  3. Mining and Metallurgy Department, McGill University, Montreal, H3A 2A7, PQ, Canada

    N. Jin (Research Associate)

  4. Department of Mechanical Engineering, Oregon State University, 97331, Corvallis, OR

    M. E. Kassner (Professor)

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  1. H. J. McQueen
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  2. E. Evangelista
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  3. N. Jin
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  4. M. E. Kassner
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Formerly with Concordia University

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McQueen, H.J., Evangelista, E., Jin, N. et al. Energy dissipation efficiency in aluminum dependent on monotonic flow curves and dynamic recovery. Metall Mater Trans A 26, 1757–1766 (1995). https://doi.org/10.1007/BF02670763

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