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Effect of strain rate on the flow stress of three liquid phase sintered tungsten alloys

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Abstract

Stress/strain tests were carried out in compression on three liquid phase sintered tungsten alloys, with tungsten contents of 90, 95, and 97.4 wt pct, in the strain rate range 10−3 s−1 to 103 s−1. Each alloy shows a gradual increase of flow stress with strain rate, and evidence of work softening is observed when the strain rate is of the order of 2 s−1 or greater. The work softening effect is shown to result from a temperature rise due to the plastic deformation and partly masks the strain rate effect at strains greater than 0.1. The 97.4 pct tungsten alloy also shows variable behavior due to cracking associated with the presence of a brittle phase at the tungsten particle/matrix interface.

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Authors and Affiliations

  1. Australian Department of Defence, Materials Research Labo- ratories, Ascot Vale, 3032, P.O. Box 50, Victoria, Australia

    R. L. Woodward, N. J. Baldwin, I. Burch & B. J. Baxter

Authors
  1. R. L. Woodward
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  2. N. J. Baldwin
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  3. I. Burch
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  4. B. J. Baxter
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Woodward, R.L., Baldwin, N.J., Burch, I. et al. Effect of strain rate on the flow stress of three liquid phase sintered tungsten alloys. Metall Trans A 16, 2031–2037 (1985). https://doi.org/10.1007/BF02662404

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  • DOI: https://doi.org/10.1007/BF02662404

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