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Hot explosive consolidation of W-Ti alloys

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Abstract

High-density (98 pct TD) 95W-5Ti (wt pct) alloys have been fabricated by a combustion-synthesis-assisted hot explosive consolidation (CSA-HEC) technique. In the current procedure, a W + Ti powder compact is preheated by the heat released by a Ti + C exothermic combustion synthesis reaction and subsequently consolidated by pressure waves generated by the detonation of an explo-sive. The amounts of explosive charge, sample configuration, and molar ratio of exothermic material to sample were found to affect the degree of consolidation. Auxiliary temperature measurements were performed to determine the precompaction thermal history of the sample to obtain the optimum delay time for consolidation. As observed with scanning electron microscopy (SEM), the CSA-HEC microcomposites consist of W particles surrounded by a partially discontinuous Ti-rich matrix. Trans-mission electron microscopy (TEM) was also used to further characterize the W/Ti interfacial region. The pertinent features of the technique as well as those of the product microstructures are discussed.

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Authors and Affiliations

  1. Aberdeen Proving Ground, United States Army Research Laboratory, 21005-5066, MD

    Laszlo J. Kecskes (Research Physical Scientist)

  2. Materials Science Program, is with the University of Delaware, 19716-3106, Newark, DE

    Ian W. Hall (Associate Professor of Mechanical Engineering, and Chair)

Authors
  1. Laszlo J. Kecskes
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  2. Ian W. Hall
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Kecskes, L.J., Hall, I.W. Hot explosive consolidation of W-Ti alloys. Metall Mater Trans A 26, 2407–2414 (1995). https://doi.org/10.1007/BF02671254

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  • DOI: https://doi.org/10.1007/BF02671254

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