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Equal-Channel Angular Extrusion of a Low-Density High-Entropy Alloy Produced by High-Energy Cryogenic Mechanical Alloying

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Abstract

In this study, we demonstrate the feasibility of forming a bulk consolidated, low-density high-entropy alloy, namely AlFeMgTiZn, which shows reasonable mechanical properties and high hardness. The fabrication of the high-entropy alloy from powdered precursors via high-energy mechanical alloying as a function of milling time is presented. In turn, the evolution of the alloy microstructure with postmilling anneal treatment is elucidated. Last, the severe plastic deformation processing methodology, i.e., equal-channel angular extrusion, chosen for consolidation, is described and shown to result in a bulk product with good results.

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Authors and Affiliations

  1. U.S. Army Research Laboratory, Aberdeen Proving Ground, Aberdeen, MD, 21005, USA

    Vincent H. Hammond, Mark A. Atwater, Kristopher A. Darling, Hoang Q. Nguyen & Laszlo J. Kecskes

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  1. Vincent H. Hammond
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  2. Mark A. Atwater
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  3. Kristopher A. Darling
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  4. Hoang Q. Nguyen
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  5. Laszlo J. Kecskes
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Correspondence to Vincent H. Hammond.

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Hammond, V.H., Atwater, M.A., Darling, K.A. et al. Equal-Channel Angular Extrusion of a Low-Density High-Entropy Alloy Produced by High-Energy Cryogenic Mechanical Alloying. JOM 66, 2021–2029 (2014). https://doi.org/10.1007/s11837-014-1113-x

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  • DOI: https://doi.org/10.1007/s11837-014-1113-x

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