|
|
|
| Study on Electric Pulse Assisted Aging Process of High-Strength Aluminum Alloy Plates |
| MA Yunlong1, ZHAN Lihua2,3, XU Yongqian2, TONG Canyu2, TAN Jingsheng3 |
(1. Beijing Aerospace Systems Engineering Research Institute, Beijing 100076, China;
2. Light Alloy Research Institute of Central South University, Changsha 410083, China;
3. College of Mechanical and Electrical Engineering of Central South University, Changsha 410083, China) |
|
|
|
|
Abstract The electric pulse assisted aging process of 2219 aluminum alloy plates is simulated and studied by experiments.The effect of electric pulse on the current density distribution, Joule heat effect, mechanical properties and precipitates microstructure is investigated by simulation analysis, electric pulse assisted aging test, tensile test and transmission electron microscopy observation. The results show that the peak current density of the electric pulse assisted aged plate is symmetrically distributed. Under the current density of 80A/cm2, the peak current density in most areas of the sheet is between 40 and 120A/cm2. Meanwhile, the temperature rise of the plate is less than 1℃ . Compared with the conventional aging process, the aging precipitation process is accelerated and the distribution of precipitates is homogenized after the electric pulse assisted aging process. The peak aging time was shortened from 15h to 10h, peak aging yield strength also increased from 283MPa to 303MPa. Furthermore, it indicated that the electric pulse assisted aging process can shorten the production time and improve the mechanical properties of the studied alloy.
|
|
|
|
|
|
|
|
|
2017, 
