Improvement of the Mechanical Properties of the Diffusion-Bonded 2024 Aluminum Alloy through Post-Weld Heat Treatments

In this study, 2024 aluminum alloy was diffusion bonded to identify the effect of bonding temperature, applied pressure, and heating time on microstructure, hardness, strength. The shear strength increased from 62.5 MPa 81.2 along with rise in temperatures 440 °C 490 °C. rose an optimal value by extending 30 min 240 at a temperature constant pressure 5 MPa. addition, various post-weld heat treatments for diffusion-bonded joints were also performed improve bond quality. After T6 or T4 treatment, hardness interface substrate due precipitation Al2Cu. Post-weld microhardness 106.3 Hv 138.25 130.6 Hv, respectively. AA2024 significantly improved up 124.5 164.3 treatments,