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Interfacial embrittlement in liquid-phase sintered tungsten heavy alloys

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Abstract

The variations in toughness of the liquid-phase sintered heavy alloys W-Ni-Fe and W-Ni-Cu have been examined. Toughness was found to be controlled primarily by the strength of the tungsten particle-matrix interfaces, which is sensitive to the rate of cooling from the sintering temperature. Furnace-cooling led to the embrittlement of these interfaces; in the case of W-Ni-Fe transmission electron microscopy identified interfacial precipitation of a W(NiFe) intermetallic compound, and in W-Ni-Cu Auger electron spectroscopy indicated interfacial segregation of the trace elements phosphorus and sulfur. This embrittlement was effectively reduced by solution treating beneath the sintering temperature and quenching

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Authors and Affiliations

  1. Department of Metallurgy and Materials Science, University of Cambridge, CB2 3QZ, Cambridge, U.K

    D. V. Edmonds (Royal Society Warren Research Fellow)

  2. Royal Armament Research and Development Establishment, Ministry of Defense, 14 7BP, Fort Halstead, Sevenoaks, TN, UK

    P. N. Jones

Authors
  1. D. V. Edmonds
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  2. P. N. Jones
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Edmonds, D.V., Jones, P.N. Interfacial embrittlement in liquid-phase sintered tungsten heavy alloys. Metall Trans A 10, 289–295 (1979). https://doi.org/10.1007/BF02658336

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  • DOI: https://doi.org/10.1007/BF02658336

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