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Effect of short‐range order on the temperature dependence of plastic flow in α‐brasses

physica status solidi (a), ISSN: 1521-396X, Vol: 107, Issue: 1, Page: 187-195
1988
  • 27
    Citations
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  • 18
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Metrics Details

  • Citations
    27
    • Citation Indexes
      27
  • Captures
    18

Article Description

The temperature dependence of the yield‐stress of mono‐ and poly‐crystalline α‐brasses containing 5 to 35 at% zinc in the range 4 to 300 K is analysed in terms of the kink‐pair model of solid‐solution hardening. The parameter W in the theoretical relation τ = τ exp (–mkT/W), where m is a constant equal to about 25, is evaluated for each composition of brasses from the slope of the ln τ/T‐line drawn through data points. A peak is observed at about 27 at% zinc in the correlation of W with solute concentration c. The decrease in the value of W with increase in c beyond 27 at% zinc seems to be associated with short‐range order in the vicinity of dislocation cores. Copyright © 1988 WILEY‐VCH Verlag GmbH & Co. KGaA

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