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Inelastic deformation and dislocation structure of a nickel alloy: Effects of deformation and thermal histories

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Abstract

The inelastic deformation behavior of a nickel-base alloy, B1900 + Hf, has been examined under nonisothermal conditions by performing step temperature tensile tests and thermomechanical cyclic tests. In both cases, the temperature ranges of interest are 538 °C to 760 °C, where the peak strength of γ′occurs, and 760 °C to 982 °C, where static thermal recovery is important. The dislocation structures of the deformed specimens are characterized using transmission electron microscopy and correlated with the macroscopic inelastic behavior. The present results for nonisothermal loading are compared with previous isothermal data to assess the effects of deformation and thermal histories on high-temperature, inelastic deformation behavior and dislocation structures. Relations of dislocation structures and the unified constitutive theories for representing all aspects of inelastic deformation, including plasticity under monotonic and cyclic loading, creep, and stress relaxation, are then discussed.

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Authors and Affiliations

  1. Southwest Research Institute, 6220 Culebra Road, 78284, San Antonio, TX

    K. S. Chan (Principal Engineer) & R. A. Page (Staff Scientist)

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  1. K. S. Chan
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  2. R. A. Page
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Chan, K.S., Page, R.A. Inelastic deformation and dislocation structure of a nickel alloy: Effects of deformation and thermal histories. Metall Trans A 19, 2477–2486 (1988). https://doi.org/10.1007/BF02645475

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  • DOI: https://doi.org/10.1007/BF02645475

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