Journal
MATERIALS TODAY COMMUNICATIONS
Volume 27, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtcomm.2021.102471
Keywords
Al-Mg-Si-Cu-Zn alloy; Constitutive equation; Processing map; Microstructure evolution
Categories
Funding
- Key Project of Intergovernmental Cooperation on Science and Technology Innovation [2017YFE0113400]
- Major scientific and technological projects of Sichuan Province [1840STC30704/01]
Ask authors/readers for more resources
The true stress-strain curve of Al-Mg-Si-Cu-Zn alloy under high temperature and high strain rate conditions was obtained, and the constitutive equation was established. The optimum hot working window was determined based on the comparison of predicted values from the model with experimental values.
The true stress-strain curve of Al-Mg-Si-Cu-Zn alloy under the condition of temperature from 350 degrees C to 500 degrees C and strain rate from 0.01 s(-1) to 10 s(-1) was obtained by Gleeble-3500 thermal-mechanical simulator. Based on these data, the constitutive equation of aluminum alloy is established by using hyperbolic sinusoidal model, and the average hot deformation activation energy Q = 256 kJ/mol is obtained. The model established can well predict the flow behavior of Al-0.9Mg-0.75i-0.3Cu-0.6Zn alloy, and the average absolute relative error (AARE) between the predicted value and the experimental value is 6.3 %. The processing map was developed according to dynamic material science model (DMM) and Prasad's criterion and the optimum hot working window is found to be 470 degrees C -500 degrees C/0.1 s(-1) -0.01 s(-1) . The microstructure evolution of aluminum alloy during isothermal compression deformation was analyzed by transmission electron microscopy (TEM). It was found that DRV is the main dynamic softening mechanism under experimental deformation conditions.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available