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Effect of the state of long-range order and grain size on the work hardening of the alloy Ni3Mn

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Abstract

The dependence of the coefficients of the Petch equation σ = σ0 + + kd-1/2 on the degree of long-range order and deformation has been investigated. It is found that work hardening within a grain (dσ0/dɛ) is greater in the ordered state, while that at the grain boundaries (dk/dɛ) is greater in the disordered state. The hardening coefficient at stage II, ®II, is almost independent of the degree of ordering η, and the stress at the beginning of stage III decreases considerably with reduction of η. The nature of the maximum of the flow stress for the ordered alloy has been analyzed in detail for 0 < η < 1. The contribution of certain mechanisms which may cause the appearance of this maximum to the flow stress has been estimated. It is concluded that a definitive solution of this problem is not possible at the present time.

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Authors and Affiliations

  1. Kuznetsov Siberian Physico-technical institute, USSR

    E. V. Kozlov, N. A. Aleksandrov & L. E. Popov

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  1. E. V. Kozlov
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  2. N. A. Aleksandrov
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  3. L. E. Popov
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Kozlov, E.V., Aleksandrov, N.A. & Popov, L.E. Effect of the state of long-range order and grain size on the work hardening of the alloy Ni3Mn. Soviet Physics Journal 9, 108–115 (1966). https://doi.org/10.1007/BF00818195

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  • DOI: https://doi.org/10.1007/BF00818195

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