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Deformation mechanism and recrystallization microstructure evolution of aluminum stiffened cylinder during hot flow spinning based on numerical simulation
Received date: 2022-04-28
Revised date: 2022-05-12
Accepted date: 2022-05-24
Online published: 2022-06-08
Supported by
National Natural Science Foundation of China(51790175)
Spinning is an advanced technology for integral near-net forming of stiffened thin-walled cylinder. In this paper， the numerical simulation method was applied to investigate the deformation mechanism and microstructure evolution characteristics of the aluminum alloy cylinder with multi-level stiffeners during hot spinning. An internal variable constitutive model of 2219 aluminum alloy was embedded in ABAQUS software to establish a hot spinning simulation model， which represents accurately the macroscopic deformation and microscopic grain evolution of the material during metal spinning， and then the analysis of spinning deformation of a cylinder with multi-level stiffeners was completed. The results show that when the thinning rate and the forming temperature were given to be 50% and 300 ℃， respectively， with the increase of the width of stiffeners， the filling type of material changes from “extrusion” to “collapse”， and the material deformation in the stiffeners groove decreases and the grain size heterogeneity increases. The grain size of narrow stiffeners at 250 ℃ is obviously smaller than that at 350 ℃， while the grain size of wide stiffeners from 250 ℃ to 350 ℃ is comparable. The effect of the forming temperature on the grain size of narrow stiffeners is obvious， while the effect is limited for wide stiffeners.
Fengqi WANG , Zhongqi YU , Yehui MENG , Tian GAN , Yixi ZHAO . Deformation mechanism and recrystallization microstructure evolution of aluminum stiffened cylinder during hot flow spinning based on numerical simulation[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2023 , 44(9) : 627341 -627341 . DOI: 10.7527/S1000-6893.2022.27341
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