Effect of multi-stage solution and aging process on microstructure and properties of Al-11.2Zn-3.0Mg-1.3Cu-0.2Zr aluminum alloy extrusion

摘要

The aluminum alloy extrusion materials were treated by multi-stage solution aging, and the microstructure and mechanical properties were characterized and tested. The results show that with the increase in solid solution temperature and time, the strength shows a trend of increasing first and then decreasing, and reaches a maximum value in G3. Under the conditions of 450 degrees C x 2 h + 460 degrees C x 2 h + 470 degrees C x 2 h in solid solution process and 121 degrees C x 5 h + 133 degrees C x 16 h in the aging process, the aluminum alloy has excellent comprehensive properties, with a strength of 828.0 MPa and elongation of 8.1%. (C) 2019 Elsevier B.V. All rights reserved.