Super-high strength Al-Zn-Cu-Mg-Zr alloy containing Sc was prepared by using active flux and water chilling copper mould, The ingot was homogenized, hot rolled, annealled and cold rolled into a sheet with thickness of 2.

Al-Zn-Mg-Cu aluminum alloy under anealing state was extruded at the temperature of 523 K through various pass equal channel angular pressing (ECAP) technique, and the real strain is up to 6.

Stress corrosion cracking of Al-Zn-Mg aluminum alloys;