Effect of Hot Forging Temperature on Microstructure, Texture, and Mechanical Properties of 2219 Al Alloy Forgings

In this study, 2219 Al alloy forgings were forged at a high temperature of 510 & DEG;C and a low temperature of 460 & DEG;C. The effect of forging temperature on the microstructure, texture and mechanical properties of the 2219 Al alloy forgings was analyzed through x-ray diffraction, tensile properties tests, scanning electron microscopy, electron back scattering diffraction and transmission electron microscopy. The results showed that, when the forging temperature was increased from 460 to 510 & DEG;C, the average ultimate tensile strength (UTS), yield strength (YS), and elongation (EI) in three directions of the 2219 forgings were increased to 460.3 & PLUSMN; 0.6 MPa, 347.3 & PLUSMN; 0.4 MPa, and 9.7 & PLUSMN; 0.3%, where were increases of 5.4%, 3.3%, and 26%, respectively. After 510 & DEG;C-formed forgings, the recrystallization fraction and the content of substructure in the matrix increase obviously, which is beneficial to improve the forgings anisotropy (IFA). The IFA in UTS, YS and EI of the 2219 forgings decreased by 54.3, 18.7, and 7.3, respectively. These differences were attributed to a diminished coarse second phase, which increasing the oversaturation of the alloy in forgings formed at 510 & DEG;C. Thus, it can be concluded that high-temperature-formed 2219 Al alloy forgings have improved mechanical properties and weakened anisotropy.