Strengthening in high strength Cu-Cr-Zr-Ti alloy plates produced by hot rolling

The aim of present investigation was to achieve different combination of strength and ductility in Cu-Cr-Zr-Ti alloy by multi-pass rolling in the temperature range of 500-800 °C. The hot rolled specimens were characterized for microstructure and mechanical properties by optical microscopy, transmission electron microscopy, and tensile testing. Specimens rolled in the aforementioned temperature range showed yield strength better than that of solution treated condition. Combination of high strength and good ductility was achieved by rolling at 500 °C with ultimate tensile strength, yield strength, and ductility of 349 MPa, 318 MPa, and 26% respectively. The superior strength achieved by rolling at 500 °C has been attributed to formation of fine chromium precipitates and high dislocation density.