Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1574978 | Materials Science and Engineering: A | 2014 | 5 Pages |
Abstract
A novel thermo-mechanical treatment, composed of under-aging, cold-rolling and re-aging, has been developed to improve the strength and ductility of Al-Mg-Si-Cu alloys pronouncedly. The thermo-mechanically treated 6061 Al sheets exhibit much higher ultimate tensile strength and yield strength (being 560Â MPa and 542Â MPa, respectively) than those of the conventional peak-aged sheets (being 365Â MPa and 348Â MPa, respectively), while maintaining rather good elongation to failure and uniform elongation (being 8.5% and 7%, respectively). The microstructure analyses show that the high strength is attributed to a combination of precipitation strengthening, dislocation strengthening, sub-structure strengthening and high Taylor factor value and the good ductility is attributed to both the recovery process and the re-precipitation of the GP zones. Furthermore, the contributions of different strengthening mechanisms are quantitatively estimated.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Zhixiu Wang, Hai Li, Fenfen Miao, Bijun Fang, Renguo Song, Ziqiao Zheng,