复杂内筋铝筒段旋压变形规律和再结晶组织演变数值仿真

doi:10.7527/S1000-6893.2022.27341

薄壁构件材料-结构一体化设计与制造专栏

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复杂内筋铝筒段旋压变形规律和再结晶组织演变数值仿真

王凤琪, 于忠奇(), 孟烨晖, 甘甜, 赵亦希

上海交通大学上海市复杂薄板结构数字化制造重点实验室，上海　200240

收稿日期:2022-04-28 修回日期:2022-05-12 接受日期:2022-05-24 出版日期:2022-06-09 发布日期:2022-06-08
通讯作者: 于忠奇 E-mail:yuzhq@sjtu.edu.cn
基金资助:
国家自然科学基金重大项目(51790175);国家自然科学基金面上项目(52175346)

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

Fengqi WANG, Zhongqi YU(), Yehui MENG, Tian GAN, Yixi ZHAO

Shanghai Key Laboratory of Digital Manufacture for Thin-walled Structures，Shanghai Jiao Tong University，Shanghai 200240，China

Received:2022-04-28 Revised:2022-05-12 Accepted:2022-05-24 Online:2022-06-09 Published:2022-06-08
Contact: Zhongqi YU E-mail:yuzhq@sjtu.edu.cn
Supported by:
National Natural Science Foundation of China(51790175)

摘要/Abstract

摘要：

流动旋压是一种先进的内筋薄壁筒段整体近净成形方法。本文运用数值仿真方法研究多级筋铝合金筒段热旋压过程中材料流变规律和组织演变特性。将内变量型2219铝合金本构模型嵌入ABAQUS仿真平台建立了准确反映宏观流变和微观晶粒演变的热旋压仿真模型，完成了具有多级特征的内筋筒段旋压成形规律分析。研究表明在减薄率为50%、温度为300 ℃的旋压参数下，随内筋宽度增加材料由“挤压”式转变为“塌陷”式填充内筋，筋槽内材料变形量下降，筋槽内材料晶粒大小不均匀性增加；窄筋在250 ℃下的晶粒尺寸明显小于其在350 ℃下的，而宽筋在250~350 ℃下的晶粒尺寸较为接近，成形温度对窄筋晶粒大小有明显影响，而对较宽内筋的影响有限。

关键词: 内筋筒段, 热旋压成形, 再结晶, 流动特征, 组织演变

Abstract:

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.

Key words: stiffened cylinder, hot spinning, recrystallization, flow characteristic, microstructure evolution

中图分类号:

V261.3⁺3

王凤琪, 于忠奇, 孟烨晖, 甘甜, 赵亦希. 复杂内筋铝筒段旋压变形规律和再结晶组织演变数值仿真[J]. 航空学报, 2023, 44(9): 627341-627341.

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.

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E-mail：hkxb@buaa.edu.cn

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主管单位：中国科学技术协会主办单位：中国航空学会北京航空航天大学

对象	参数	数值
筒坯	外径/mm	440
	壁厚/mm	12
	高度/mm	160

筒段内筋	窄筋宽度/mm	10
	宽筋宽度/mm	40
	大面积填充区宽度/mm	140

成分	含量/wt%	成分	含量/wt%
Cu	6.74	Mg	0.005
Mn	0.29	Zn	0.02
Fe	0.15	Ti	0.05
Zr	0.14	V	0.1
Si	0.06	Al	Bal.

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复杂内筋铝筒段旋压变形规律和再结晶组织演变数值仿真

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

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