Abstract
A solution heat treatment followed by aging is typically used for age-hardening of non-ferrous alloys. In the present work, a novel strengthening route was designed for upward continuous casting of copper-based alloy rods. This route excluded a solution heat treatment and allowed aging prior to the deformation processes. The tensile strength of the copper-based rods (with only 0.26 wt.% Cr) reached 560 MPa. Furthermore, the microstructural evolution of these rods was characterized via microscopy and X-ray diffraction. The contributions of grain boundaries, precipitates, and dislocations to the strengthening of the rods were calculated, thereby revealing the strengthening mechanism.
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