Effect of Thermo-Mechanically Activated Precipitation on the Hot Deformation Behavior of High Strength Aluminum Alloy AA7075

The present study investigates the effect of two different microstructural conditions on hot deformation behavior precipitation-hardenable AA7075 by compression tests ranging from 200 °C to 350 and strain rates 0.1 s−1 10 s−1. first condition is solution heat-treated quenched in water, whereas second achieved subsequent artificial aging stabilization for 24 h at respective intended temperature. Both indicate an increase flow stress with increasing rate decreasing Moreover, temperature rate, gradually changes as dynamic recrystallization becomes dominant factor curve appearance. At same temperature, higher stresses are obtained as-quenched due precipitation growth very small precipitates (r < 20 nm) during deformation. For s−1, peak 110 MPa condition. This confirmed transmission electron microscopy investigations, which show formation fine condition, while coarse can be found stabilized microstructure. Despite this observation, work hardening analysis reveals lower strain-hardening critical onset compared thermally