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热成型过程中薄壁双曲线结构中TC4钛合金的变形控制

Deformation Control of TC4 Titanium Alloy in Thin-Walled Hyperbolic Structures During Hot Forming Processes.

作者信息

Zhang Tao, Xia Jianchao, Han Xiuquan, Du Lihua, Chen Lihua, Han Yujie, Cao Fengchao, Wang Duoduo, Liu Xiaochuan

机构信息

School of Materials Science and Engineering, Northwestern Polytechnical University, Xi'an 710072, China.

AVIC Manufacturing Technology Institute, Beijing 100024, China.

出版信息

Materials (Basel). 2024 Dec 16;17(24):6146. doi: 10.3390/ma17246146.

DOI:10.3390/ma17246146
PMID:39769745
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11676791/
Abstract

The thin-walled hyperbolic structures made from titanium alloy primarily encompass two typical forms: hyperbolic convex and hyperbolic concave (saddle). This paper addresses the technical challenges associated with the forming processes that frequently result in ripples or wrinkles in these configurations. Specifically, it investigates precision control techniques for the hot forming process of thin-walled hyperbolic skins from TC4 titanium alloy. The present study examines the relationship between the instability characteristics and defect features of the thin-walled hyperbolic skins, establishing a constitutive model for TC4 titanium alloy and conducting uniaxial tensile tests. For the hyperbolic convex skin and the hyperbolic saddle skin, small-margin coupled hot pressing and curved edge forming processes are employed, respectively. Results are analyzed to identify the forms and distribution patterns of forming defects across different geometries. Furthermore, the surface accuracy following the forming processes is compared, culminating in a summary of the relationship between the ratio of the sum of chord heights to the sum of chord lengths and the occurrence of ripples and wrinkles.

摘要

由钛合金制成的薄壁双曲线结构主要包括两种典型形式

双曲线凸形和双曲线凹形（鞍形）。本文探讨了与这些结构的成型过程相关的技术挑战，这些挑战经常导致在这些构型中出现波纹或褶皱。具体而言，研究了TC4钛合金薄壁双曲线蒙皮热成型过程的精密控制技术。本研究考察了薄壁双曲线蒙皮的失稳特性与缺陷特征之间的关系，建立了TC4钛合金的本构模型并进行了单轴拉伸试验。对于双曲线凸形蒙皮和双曲线鞍形蒙皮，分别采用了小余量耦合热压和曲边成型工艺。分析结果以确定不同几何形状下成型缺陷的形式和分布模式。此外，比较了成型过程后的表面精度，最终总结了弦高之和与弦长之和的比值与波纹和褶皱出现之间的关系。

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本文引用的文献

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Materials (Basel). 2024 Oct 17;17(20):5071. doi: 10.3390/ma17205071.
2
Finite Element Simulation and Microstructural Evolution Investigation in Hot Stamping Process of Ti6Al4V Alloy Sheets.Ti6Al4V合金板材热冲压过程中的有限元模拟与微观组织演变研究
Materials (Basel). 2024 Mar 18;17(6):1388. doi: 10.3390/ma17061388.
3
Effect of Heating on Hot Deformation and Microstructural Evolution of Ti-6Al-4V Titanium Alloy.
加热对Ti-6Al-4V钛合金热变形及微观组织演变的影响
Materials (Basel). 2023 Jan 13;16(2):810. doi: 10.3390/ma16020810.
4
Mechanical Properties and Fracture Behavior of a TC4 Titanium Alloy Sheet.TC4钛合金板材的力学性能与断裂行为
Materials (Basel). 2022 Dec 1;15(23):8589. doi: 10.3390/ma15238589.
5
Strain Rate Sensitivity of Tensile Properties in Ti-6.6Al-3.3Mo-1.8Zr-0.29Si Alloy: Experiments and Constitutive Modeling.Ti-6.6Al-3.3Mo-1.8Zr-0.29Si合金拉伸性能的应变速率敏感性：实验与本构模型
Materials (Basel). 2018 Sep 2;11(9):1591. doi: 10.3390/ma11091591.
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