Research on Superplasticity of 5A90-O Aluminum Alloy Sheet

2016 2nd International Conference on Mechanical and Aeronautical Engineering (ICMAE 2016)

机械制造;航空航天工程

Li, Zhi-Qiang^1 ; Lu, Wen-Lin^1 ; Zhang, Feng^1 ; Hu, Fengjiao^1 ; Wang, Yong^1

Beijing Research Institute, Mechanical and Electrical Technology, Beijing

100083, China^1

关键词: Aluminum alloy sheet;    Extension rates;    Superplastic materials;    Temperature increase;    Tensile method;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/187/1/012025/pdf
DOI  :  10.1088/1757-899X/187/1/012025

学科分类：航空航天科学

来源: IOP

【 摘 要 】

The influence of temperature and strain rate on the 5A90-O had been researched by costant strain-rate tensile method. The result shows that, although 5A90-O is not an ideal superplastic material, under certain conditions, with a large extension rate, the maximum elongation is193.6%. The strain rate has a significant impact on the flow stress and tensile strength under T=375 C∼500 C. With the decrease of strain rate, the load is reduced. Another important factor that affects the flow stress of 5A90 is temperature. Under the same strain rate, the flow stress of 5A90 is lower with the temperature increase. We choose the Backofen law as the constitutive equation of 5A90, the best condition of 5A90 surperplastic deformation is T=400 C,= 0.005s-1.