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The quench sensitivity of some typical high strength Al–Zn–Mg–Cu alloys, including 7075, 7175, 7050, 7010, 7055, 7085 and 1933, was investigated by time–temperature-properties (TTP) diagrams which were from the present paper and literature. The drop in the mechanical properties due to decreased quenching rate was predicted by quench factor analysis method. The nose temperature of TTP diagrams was...