中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 22 No. 9 September 2012 |
（1. Faculty of Engineering, Islamic Azad University, Dezful Branch, Dezful 64616-63679, Iran;
2. Department of Materials Science and Engineering, Faculty of Engineering, Arak University,
Arak 38156-8-8349, Iran）
Abstract:The influence of combination of different designated precipitation hardening and cold working on the tensile properties of 6061 aluminum alloy was investigated. The results indicate that applying single aging at 180 °C for 4 h in different thermal-mechanical treatments improves both the strength and elongation. However, double aging does not improve the mechanical properties. In addition, pre-aging shows a negative effect on the subsequent precipitation hardening of material. The changes in mechanical properties were discussed by explanation of microstructural evolution due to the competition of precipitation hardening, strain hardening and work softening processes.
Key words: 6061 aluminum alloy; age hardening; hardening; mechanical properties
