High-temperature Tensile Deformation Behaviour of Aluminium Alloy 2024 and Prediction of Forming Limit Curves

2018 International Conference on Advanced Electronic Materials, Computers and Materials Engineering

材料科学;无线电电子学;计算机科学

Jiang, Yang^1 ; Xiao, Xing^1

Transportation Institute, Hohhot University, Inner-Mongolia

010070, China^1

关键词: Effects of temperature;    Forming limit curve;    Forming limits;    High temperature;    High-temperature tensile;    M-K theory;    Thermal-mechanical simulations;    True stress strain curve;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/439/4/042030/pdf
DOI  :  10.1088/1757-899X/439/4/042030

来源: IOP

【 摘 要 】

Tensile tests were performed on aluminum alloy 2024 (AA 2024) using a Gleeble-1500 thermal-mechanical simulation system at high temperatures of 350, 400 and 450 °C and strain rates of 0.01, 0.1 and 1 s-1. True stress-strain curves of AA 2024 were obtained. Forming limit curves (FLC) of AA 2024 were theoretically predicted based on Marciniak-Kuczynski (M-K) groove theory. In addition, the predicted curves were validated using the Nakazima method, and the effects of temperature on the FLC were analyzed. The results show that the curves predicted based on the M-K theory were in relatively good agreement with the experimental data. The forming limit of the AA 2024 sheet first increased, reached a maximum at 400 °C, and then decreased as its temperature increased.