Abstract
The substructures of Cr ribbon/fibers in Cu-15Cr in-situ composites under both the as-drawn and aged conditions have been examined by transmission electron microscopy (TEM) observation. The residual stress in the axial direction of the deformed Cr ribbon/fiber has been evaluated by X-ray diffraction. Deformation strain partitioning between Cu and Cr phases occurs during cold drawing because of large differences in modulus and flow stress between Cu and Cr. The axial residual stress in the Cr fibers does not increase significantly with further cold drawing after the preferred orientation of the Cr phase has been fully developed (drawing strain >4.5), because dynamic recovery and recrystallization of the fcc Cu minimize the misfit strain between the Cr fibers and the Cu matrix. The compressive axial residual stress in the Cr fibers is produced by aging treatments at temperatures above 580 °C because of the large difference in thermal expansion coefficient between Cu and Cr.
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Sun, S. Structures and residual stresses of Cr fibers in Cu-15Cr in-situ composites. Metall Mater Trans A 32, 1225–1232 (2001). https://doi.org/10.1007/s11661-001-0131-9
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DOI: https://doi.org/10.1007/s11661-001-0131-9