Annealing effect after cryogenic rolled of Al alloy

cloudyew

The material used is AA6061 T6.
First the material solution treated at furnace at 500C for 18 hours.
Then the alloy quenxh with water and leave to room temperature.
Then the aluminum alloy is cryogenic rolling with liquid nitrogen.
Then the alloy annealed at different temperatures from 300C to 500C.

What the effect to tensile strength??
Is it only decrease or decrease first and then increase later?