Deformation mechanism and recrystallization microstructure evolution of aluminum stiffened cylinder during hot flow spinning based on numerical simulation

被引：0
|
作者：
Wang F. [1 ]
Yu Z. [1 ]
Meng Y. [1 ]
Gan T. [1 ]
Zhao Y. [1 ]
机构：
[1] Shanghai Key Laboratory of Digital Manufacture for Thin-Walled Structures, Shanghai Jiao Tong University, Shanghai
来源：
Hangkong Xuebao/Acta Aeronautica et Astronautica Sinica | 2023年 / 44卷 / 09期
基金：
中国国家自然科学基金;
关键词：
flow characteristic; hot spinning; microstructure evolution; recrystallization; stiffened cylinder;
D O I：
10.7527/S1000-6893.2022.27341
中图分类号：
学科分类号：
摘要：
Spinning is an advanced technology for integral near-net forming of stiffened thin-walled cylinder. In this pa per，the numerical simulation method was applied to investigate the deformation mechanism and microstructure evolu tion 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 dur ing metal spinning，and then the analysis of spinning deformation of a cylinder with multi-level stiffeners was com pleted. 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“col lapse”，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 stiffen ers 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. © 2023 AAAS Press of Chinese Society of Aeronautics and Astronautics. All rights reserved.
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