Open AccessOptimization of Superplastic Forming Process of AA7075 Alloy for the Best Wall Thickness Distribution
Author(s) -
Manh Tien Nguyen,
Truong An Nguyen,
Đức Hoàn Trần,
Van Thao Le
Publication year - 2021
Publication title -
advances in technology innovation
Language(s) - English
Resource type - Journals
eISSN - 2518-2994
pISSN - 2415-0436
DOI - 10.46604/aiti.2021.7835
Subject(s) - superplasticity , materials science , deformation (meteorology) , response surface methodology , alloy , forming processes , work (physics) , process (computing) , degree (music) , process optimization , composite material , metallurgy , structural engineering , mechanical engineering , computer science , mathematics , engineering , statistics , physics , environmental engineering , acoustics , operating system
This work aims to optimize the process parameters for improving the wall thickness distribution of the sheet superplastic forming process of AA7075 alloy. The considered factors include forming pressure p (MPa), deformation temperature T (°C), and forming time t (minutes), while the responses are the thinning degree of the wall thickness ε (%) and the relative height of the product h*. First, a series of experiments are conducted in conjunction with response surface method (RSM) to render the relationship between inputs and outputs. Subsequently, an analysis of variance (ANOVA) is conducted to verify the response significance and parameter effects. Finally, a numerical optimization algorithm is used to determine the best forming conditions. The results indicate that the thinning degree of 13.121% is achieved at the forming pressure of 0.7 MPa, the deformation temperature of 500°C, and the forming time of 31 minutes.