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Compatibility of deformation in two-phase Ti-Al alloys: Dependence on microstructure and orientation relationships

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Abstract

A two-phase alloy of composition Ti-47.5Al-2.5Cr has been studied under two heat-treated conditions in order to obtain different microstructures. These consisted of lamellar and equiaxed distributions of y grains in which the α2 phase was distributed as long lamellae or smaller globules, respectively. The specific rotation relationships between γ/γ and γ/α2 grains have been measured, and these have been used to understand their effect on the compatibility of deformation across adjacent grains. For this, detailed analysis of active slip systems has been carried out by transmission electron microscopy (TEM) observations of deformed samples. A theoretical calculation of a geometric compatibility factor characterizing the best slip transfer across adjacent grains has been used in such a way that it has been possible to deduce the role played by the type of orientation relationship between grains in producing active deformation systems that allow the maximum compatibility of deformation.

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Authors and Affiliations

  1. CASTOLIN, St. Sulpice, Switzerland

    J. Luster (Research Scientist)

  2. Institute of Structural Metallurgy, University of Neuchâtel, Neuchâtel, Switzerland

    M. A. Morris (Professor)

Authors
  1. J. Luster
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  2. M. A. Morris
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Luster, J., Morris, M.A. Compatibility of deformation in two-phase Ti-Al alloys: Dependence on microstructure and orientation relationships. Metall Mater Trans A 26, 1745–1756 (1995). https://doi.org/10.1007/BF02670762

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  • DOI: https://doi.org/10.1007/BF02670762

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