Ti-6Al-4V钛合金箔材电辅助短时应力松弛行为研究

姜威; 汤泽军; 李新杰; 艾宇聪

doi:10.3969/j.issn.1674-6457.2026.01.004

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精密成形工程 ›› 2026, Vol. 18 ›› Issue (1) : 36-45. DOI: 10.3969/j.issn.1674-6457.2026.01.004

轻合金成形

Ti-6Al-4V钛合金箔材电辅助短时应力松弛行为研究

姜威, 汤泽军^*, 李新杰, 艾宇聪

作者信息 +

Electrically Assisted Short-term Stress Relaxation Behavior of Ti-6Al-4V Titanium Alloy Foil

JIANG Wei, TANG Zejun^*, LI Xinjie, AI Yucong

Author information +

文章历史 +

摘要

目的研究Ti-6Al-4V钛合金箔材的电辅助短时应力松弛行为,构建电辅助应力松弛本构方程及蠕变型本构模型。方法搭建电辅助应力松弛试验平台,在预位移0.6 mm的变形条件下对Ti-6Al-4V箔材开展峰值电流为14、18、22 A的短时应力松弛实验,获得不同脉冲电流参数下的温度及分布特征,引入有效预应变以考虑热膨胀对箔材的影响,绘制不同初始条件下的应力-时间曲线。利用三次延迟函数对Ti-6Al-4V箔材的电辅助应力松弛曲线进行拟合,基于Arrhenius本构方程建立双曲正弦型的电辅助蠕变本构模型并验证其预测精度。结果根据箔材上的非均匀温度场分布可计算得到实际的有效预应变量。峰值电流越高,松弛结束时的剩余应力越低,应力松弛率越高。所构建的电辅助应力松弛本构方程的预测精度在99.805%以上,电辅助蠕变本构模型的预测精度在90.441%以上。结论 Ti-6Al-4V箔材的电辅助应力松弛行为特征（初始应力、松弛结束的剩余应力、应力松弛率、蠕变应变速率等）受预应变和脉冲电流的综合影响,其中脉冲电流占主导地位。考虑有效预应变和峰值电流建立的应力松弛方程及蠕变型本构模型具有较高的预测精度。

Abstract

The work aims to study the electrically assisted short-term stress relaxation behavior of Ti-6Al-4V titanium alloy foil and construct the electrically assisted stress relaxation constitutive equation and creep constitutive model. The electrically assisted stress relaxation test platform was built, and the short-term stress relaxation experiments of Ti-6Al-4V foil with peak currents of 14 A, 18 A and 22 A were carried out under the deformation conditions of pre-displacement of 0.6 mm. The temperature and distribution characteristics under different pulse current parameters were obtained. The effective pre-strain was introduced to consider the effect of thermal expansion on foil, and the stress-time curves under different initial conditions were drawn. The cubic delay function was used to fit the electrically assisted stress relaxation curve of Ti-6Al-4V foil. Based on the Arrhenius constitutive equation, a hyperbolic sine-type electrically assisted creep constitutive model was established and its prediction accuracy was verified. According to the non-uniform temperature field distribution on foil, the actual effective pre-strain could be calculated. When the peak current was higher, the residual stress at the end of relaxation was lower, and the stress relaxation ratio was higher. The prediction accuracy of the electrically assisted stress relaxation constitutive equation was above 99.805%, and the prediction accuracy of the electrically assisted creep constitutive model was above 90.441%. The electrically assisted stress relaxation behavior (initial stress, residual stress at the end of relaxation, stress relaxation ratio, creep strain rate, etc.) of Ti-6Al-4V foil is affected by pre-strain and pulse current, and the pulse current is dominant. The stress relaxation equation and creep constitutive model established by considering effective pre-strain and peak current have high prediction accuracy.

导出引用

姜威, 汤泽军, 李新杰, 艾宇聪. Ti-6Al-4V钛合金箔材电辅助短时应力松弛行为研究[J]. 精密成形工程. 2026, 18(1): 36-45 https://doi.org/10.3969/j.issn.1674-6457.2026.01.004

JIANG Wei, TANG Zejun, LI Xinjie, AI Yucong. Electrically Assisted Short-term Stress Relaxation Behavior of Ti-6Al-4V Titanium Alloy Foil[J]. Journal of Netshape Forming Engineering. 2026, 18(1): 36-45 https://doi.org/10.3969/j.issn.1674-6457.2026.01.004

中图分类号： TG146.23

参考文献

[1] QIU G Z, GUO Y F.Current Situation and Development Trend of Titanium Metal Industry in China[J]. International Journal of Minerals, Metallurgy and Materials, 2022, 29(4): 599-610.
[2] 张智鑫, 樊江昆, 李瑞锋, 等. 钛合金板材制备技术的现状及展望(上)——薄板制备技术[J]. 航空制造技术, 2023, 66(10): 22-33.
ZHANG Z X, FAN J K, LI R F, et al.Review of Titanium Alloy Plate Rolling Technology (Part 1)—Sheet Forming Technology[J]. Aeronautical Manufacturing Technology, 2023, 66(10): 22-33.
[3] LI H, CHEN S F, ZHANG S H, et al.Deformation Characteristics, Formability and Springback Control of Titanium Alloy Sheet at Room Temperature: A Review[J]. Materials, 2022, 15(16): 5586.
[4] 刘彦绮, 安大勇, 李细锋, 等. 多级冷压合与高温蠕变应力松弛TC4钛合金微观组织演变机理研究[J]. 塑性工程学报, 2024, 31(10): 109-115.
LIU Y Q, AN D Y, LI X F, et al.Study on Microstructure Evolution Mechanism of TC4 Titanium Sheet Formed by Multi-Pass Cold Pressing and High-Temperature Creep Stress Relaxation[J]. Journal of Plasticity Engineering, 2024, 31(10): 109-115.
[5] WANG K H, QU B, ZHAO J, et al.Accelerated Stress Relaxation with Simultaneously Enhanced Strength of Titanium Alloy by Phase Transformation and Stress- Induced Twinning[J]. Scripta Materialia, 2024, 238: 115761.
[6] 马琴, 喻文浩, 柴怡君, 等. GH4169合金的中温应力松弛行为与蠕变本构方程的修正[J]. 机械工程材料, 2024, 48(12): 112-120.
MA Q, YU W H, CHAI Y J, et al.Stress Relaxation Behavior at Medium Temperature and Creep Constitutive Equation Modification of GH4169 Alloy[J]. Materials for Mechanical Engineering, 2024, 48(12): 112-120.
[7] QU B, WANG K H, ZHAO J, et al.Relaxation Mechanisms of near-α Titanium Alloy during Stress Relaxation with Synchronous Aging[J]. Journal of Materials Research and Technology, 2024, 33: 4510-4521.
[8] LYU H Y, LI D S, LI X Q, et al.Mechanical Properties and Microstructure Evolutions of Deposited Ti-6Al-4V Titanium Alloy under Short-Term Stress Relaxation at Elevated Temperatures[J]. Journal of Materials Research and Technology, 2024, 30: 866-878.
[9] JIA C L, KOU H C, CHEN N N, et al.Stress Relaxation Induced Spheroidization of the Lamellar α Phase in Ti-7333 Alloy[J]. Journal of Alloys and Compounds, 2019, 781: 674-679.
[10] WANG Z Q, STOICA A D, MA D, et al.Stress Relaxation Behavior and Mechanisms in Ti-6Al-4V Determined via in Situ Neutron Diffraction: Application to Additive Manufacturing[J]. Materials Science and Engineering: A, 2017, 707: 585-592.
[11] 毕静, 崔学习, 张艳苓, 等. Ti-6Al-4V钛合金薄板应力松弛行为研究[J]. 机械工程学报, 2019, 55(18): 43-52.
BI J, CUI X X, ZHANG Y L, et al.Investigations on Stress Relaxation Behavior of Ti-6Al-4V Titanium Alloy Thin Sheet[J]. Journal of Mechanical Engineering, 2019, 55(18): 43-52.
[12] ZHANG Y, LI D S, LI Y, et al.A Unified Constitutive Model of Stress Relaxation of Ti-6Al-4V Alloy with Different Temperatures from Elastic to Plastic Loading[J]. Machines, 2022, 10(6): 437.
[13] LIU P, ZONG Y Y, SHAN D B, et al.Relationship between Constant-Load Creep, Decreasing-Load Creep and Stress Relaxation of Titanium Alloy[J]. Materials Science and Engineering: A, 2015, 638: 106-113.
[14] LI Y, CHEN H S, DU L H, et al.Characterization and Unified Modelling of Creep and Viscoplasticity Deformation of Titanium Alloy at Elevated Temperature[J]. International Journal of Plasticity, 2024, 173: 103892.
[15] 李军兆, 孙清洁, 于航. 高性能钛合金先进成形技术研究现状[J]. 钢铁钒钛, 2021, 42(6): 17-27.
LI J Z, SUN Q J, YU H.Current Research Status of Advanced Forming Technology for High-Performance Titanium Alloys[J]. Iron Steel Vanadium Titanium, 2021, 42(6): 17-27.
[16] XU Z T, JIANG T H, HUANG J H, et al.Electroplasticity in Electrically-Assisted Forming: Process Phenomena, Performances and Modelling[J]. International Journal of Machine Tools and Manufacture, 2022, 175: 103871.
[17] 单德彬, 李虎山, 陈俞希, 等. 复杂微型构件特种能场辅助微成形研究进展[J]. 精密成形工程, 2024, 16(7): 23-47.
SHAN D B, LI H S, CHEN Y X, et al.Research Progress on Energy Field Assisted Micro-Forming of Complex Micro Parts[J]. Journal of Netshape Forming Engineering, 2024, 16(7): 23-47.
[18] XIE H Y, DONG X H, PENG F, et al.Investigation on the Electrically-Assisted Stress Relaxation of AZ31B Magnesium Alloy Sheet[J]. Journal of Materials Processing Technology, 2016, 227: 88-95.
[19] ZHAO Y X, PENG L F, LAI X M.Influence of the Electric Pulse on Springback during Stretch U-Bending of Ti₆Al₄V Titanium Alloy Sheets[J]. Journal of Materials Processing Technology, 2018, 261: 12-23.
[20] ZHAN L H, MA Z Y, ZHANG J, et al.Stress Relaxation Ageing Behaviour and Constitutive Modelling of a 2219 Aluminium Alloy under the Effect of an Electric Pulse[J]. Journal of Alloys and Compounds, 2016, 679: 316-323.
[21] 房永强, 杨军红, 郑晓斐. 温度对TC4钛合金的组织和性能的影响[J]. 有色设备, 2018, 32(5): 22-25.
FANG Y Q, YANG J H, ZHENG X F.Effect of Temperature on the Microstructure and Properties of TC4 Titanium Alloy[J]. Nonferrous Metallurgical Equipment, 2018, 32(5): 22-25.
[22] ZONG Y Y, LIU P, GUO B, et al.Investigation on High Temperature Short-Term Creep and Stress Relaxation of Titanium Alloy[J]. Materials Science and Engineering: A, 2015, 620: 172-180.
[23] AO D W, CHU X R, YANG Y, et al.Effect of Electropulsing Treatment on Microstructure and Mechanical Behavior of Ti-6Al-4V Alloy Sheet under Argon Gas Protection[J]. Vacuum, 2018, 148: 230-238.
[24] 姜天豪. Ti₆Al₄V电辅助材料特性与薄板成形回弹研究[D]. 上海: 上海交通大学, 2019: 78-105.
JIANG T H.Study on Mechanics and Springback of Ti6Al4V Involved in Electrically Assisted Forming Process[D]. Shanghai: Shanghai Jiao Tong University, 2019: 78-105.
[25] 刘厚吉, 谢健, 李祎曼, 等. GH3536镍基变形高温合金的应力松弛行为与蠕变本构方程[J]. 塑性工程学报, 2023, 30(7): 110-117.
LIU H J, XIE J, LI Y M, et al.Stress Relaxation Behavior Test and Creep Constitutive Equation of GH3536 Nickel-Based Wrought Superalloy[J]. Journal of Plasticity Engineering, 2023, 30(7): 110-117.
[26] 姜军. 脉冲电流对TC4钛合金薄板的性能影响研究[D]. 上海: 上海交通大学, 2018: 30-36.
JIANG J.Effect of Pulse Current on Properties of TC4 Titanium Alloy Sheet[D]. Shanghai: Shanghai Jiao Tong University, 2018: 30-36.
[27] WANG B, ZHOU L, CAO Y S, et al.Analysis of Residual Stress Relief for Ti62A Alloy Welded Joints by Post Weld Heat Treatment Considering Creep Effect[J]. Journal of Materials Research and Technology, 2023, 24: 7462-7474.