Strengthening behavior of Al and Ti elements at room temperature and high temperature in modified Nimonic 80A

► Strengthening effect of Ti is more significant than that of Al at room temperature. ► Strengthening effect of Al is more significant than that of Ti at 750 °C/310 MPa. ► Volume fraction of γ′ increases with the increase of Al + Ti contents. ► Increased volume fraction of γ′ benefits the mechanical properties of Nimonic 80A. ► Precipitate of the η-Ni3Ti decreases the stress-rupture life.