The microstructures and aging characteristics of ultrasonic and traditional casting 7050aluminum alloys were investigated.The results show that

compared with the traditional casting alloy

the ultrasonic casting alloy is characterized with a finer microstructure

and aged time is decreased with easier aging-strengthened.For the hot-rolled plate

peak strength appears in the ultrasonic treated alloy with aging at 120℃ for 8hours

where tensile strength

yield strength and elongation reach 602MPa

547MPa

12.7%

respectively

while peak strength occurs in the traditional casting alloy with aged at 120℃ for 12hours

where tensile strength

yield strength and elongation are 536MPa

462MPa and 15.0%

respectively.