Effects of the coherency of Al3Zr on the microstructures and quench sensitivity of Al–Zn–Mg–Cu alloys

Effects of the coherency of Al3Zr on the microstructures and quench sensitivity of Al-8.3Zn-2.3Mg-2.4Cu (AA7055) alloys were investigated. These alloys were subjected to two cold-rolling ratios (i.e., 5% and 20%) in order to vary the coherency of Al3Zr particles. The main objectives of this study were to reduce the quench sensitivity, refine the grain size, and retain the coherency of Al3Zr for high-strength Al–Zn–Mg–Cu production alloys....