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Study of the Rheological Behavior of the β′Phase of an Equiatomic Ag-Mg Alloy

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Abstract

The thermomechanical behavior of an ordered polycrystalline equiatomic Ag-Mg alloy is studied through creep, tensile, and stress relaxation tests. The experimental ranges of temperature and stress are 395 to 652 °C and 0.4-4 × 107 Nm-2. To account for the influence of long range order on the rheological properties of this alloy, the shear modulus is measured as a function of temperature. Using the different thermodynamic parameters available in the literature, an attempt is made to check the semiempirical Dorn's equation: M = έ kT/DGb = A Φ (S)f (σ/G). Iff σ/G takes the classical power form A (σ/G)″, n is shown to increase from 4.7 to 8.8 with σ/G, and is more properly replaced with a hyperbolic sine law. The most interesting result is that, apart from slight scatter, a single master curve exists for a judicious choice of D and it is thus shown that, in the limits of this study Φ (S) is a constant.

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Authors and Affiliations

  1. Laboratoire de Mécanique Appliquée, associé au C. N. R. S., Faculté des Sciences et des Techniques, Route de Gray, 25030, Besançon Cedex, France

    C. Lexcellent (Assistant), J. Birocheau (Assistant), P. Delobelle (C. N. R. S. Ingénieur), A. Mermet (Maitre Assistant) & C. Oytana (Professor)

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  1. C. Lexcellent
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  2. J. Birocheau
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  3. P. Delobelle
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  4. A. Mermet
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  5. C. Oytana
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Lexcellent, C., Birocheau, J., Delobelle, P. et al. Study of the Rheological Behavior of the β′Phase of an Equiatomic Ag-Mg Alloy. Metall Trans A 13, 251–255 (1982). https://doi.org/10.1007/BF02643315

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  • DOI: https://doi.org/10.1007/BF02643315

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