目的 研究工业纯钛TA1脉冲电流辅助拉伸过程中的变形行为,建立多物理场耦合的本构模型。方法 利用自行搭建的电脉冲辅助拉伸平台在应变速率0.001 s-1条件下对工业纯钛TA1进行拉伸实验,获得该材料在不同电流密度和温度下的应力-应变曲线。基于实验结果建立电辅助拉伸本构模型。结果 与未通入电流相比,当电流密度为0.00、34.28、40.00、45.71 A/mm2时,材料的屈服强度分别下降了15.1%、36.6%、45.7%,抗拉强度分别下降了12.3%、27.1%、33.4%。脉冲电流引入的非热效应降低了材料的流动应力,表明了电辅助拉伸过程中非热效应的存在。基于J-C本构模型、Arrhenius双曲正弦本构模型和电磁场激发位错脱钉理论,考虑热效应和非热效应建立的TA1电辅助拉伸本构模型与实验结果的误差均小于6%。结论 考虑变形温度、电流密度与应变建立了本构模型,该模型具有较高的预测精度,可以对TA1电辅助拉伸过程中的流变应力进行准确预测。
Abstract
The work aims to study the deformation behavior of industrial pure titanium TA1 during pulsed current-assisted tensile process and establish a multi-physical field coupled constitutive model. Tensile experiments were carried out on industrial pure titanium TA1 at a strain rate of 0.001 s-1 by a self-built electric pulse-assisted tensile platform. The stress-strain curves of the material under different current densities and temperatures were obtained. Based on the experimental results, an electric-assisted tensile constitutive model was established. With the increase of current density (0.00, 34.28, 40.00, 45.71 A/mm2), the yield strength of the material decreased by 15.1%, 36.6% and 45.7% respectively and the tensile strength decreased by 12.3%, 27.1% and 33.4% respectively, compared with the case without current. The non-thermal effect introduced by the pulsed current reduced the flow stress of the material, indicating the existence of the non-thermal effect during the electric-assisted tensile process. Based on the J-C constitutive model, Arrhenius hyperbolic sine constitutive model and the dislocation depinning theory excited by the electromagnetic field, considering the thermal and non-thermal effects, the established TA1 electric-assisted tensile constitutive model was in good agreement with the experimental results, and the error of the finite element model was less than 6%. A constitutive model is established by considering the deformation temperature, current density and strain, which has a high prediction accuracy and can accurately predict the flow stress during the electrically-assisted tensile process of TA1.
关键词
工业纯钛 /
电脉冲辅助成形 /
变形行为 /
本构方程 /
有限元仿真
Key words
industrial pure titanium /
electric pulse-assisted forming /
deformation behavior /
constitutive equation /
finite element simulation
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] DONG H R, LI X Q, LI Y, et al.A Review of Electrically Assisted Heat Treatment and Forming of Aluminum Alloy Sheet[J]. The International Journal of Advanced Manufacturing Technology, 2022, 120(11): 7079-7099.
[2] JIN K, WANG J H, GUO X Z, et al.Experimental Analysis of Electro-Assisted Warm Spin Forming of Commercial Pure Titanium Components[J]. The International Journal of Advanced Manufacturing Technology, 2019, 102(1): 293-304.
[3] XING B H, HUANG T, SONG K X, et al.Effect of Electric Current on Mechanical Properties and Microstructure of Ti/Al Laminated Composite during Electrically Assisted Tension[J]. Vacuum, 2023, 210: 111805.
[4] LYU Z, ZHOU Y, ZHAN L, et al.Electrically Assisted Deep Drawing on High-strength Steel Sheet[J]. International Journal of Advanced Manufacturing Technology 2.2020,112: 763-773.
[5] WANG X W, XU J, DING M H, et al.Finite-Elements Modeling and Simulation of Electrically-Assisted Rotary-Draw Bending Process for 6063 Aluminum Alloy Micro-Tube[J]. Metals, 2021, 11(12): 1956.
[6] TIWARI J, BALAJI V, KRISHNASWAMY H, et al.Dislocation Density Based Modelling of Electrically Assisted Deformation Process by Finite Element Approach[J]. International Journal of Mechanical Sciences, 2022, 227: 107433.
[7] 李萍, 解修明, 汪会干, 等. Ti55合金电辅助V弯电热力耦合仿真及回弹预测[J]. 中国有色金属学报, 2021, 31(4): 847-857.
LI P, XIE X M, WANG H G, et al.Electric-Thermal- Mechanical Coupled Simulation and Springback Prediction of Ti55 Alloy Electrical Assisted V-Bending[J]. The Chinese Journal of Nonferrous Metals, 2021, 31(4): 847-857.
[8] 张宇翔, 汤泽军, 许爱军, 等. Ti55钛合金管电辅助加热气压胀形圆角填充成形规律及多场耦合数值模拟[J]. 锻压技术, 2021, 46(4): 112-120.
ZHANG Y X, TANG Z J, XU A J, et al.Fillet Filling Law and Multi-Field Coupling Numerical Simulation of Ti55 Titanium Alloy Pipe in Electric Assisted Heating Bulging[J]. Forging & Stamping Technology, 2021, 46(4): 112-120.
[9] 林继彬, 阮金华, 张宏昱, 等. 电辅助不锈钢/碳钢轧制复合厚度比变化规律[J]. 锻压技术, 2023, 48(9): 98-107.
LIN J B, RUAN J H, ZHANG H Y, et al.Change Law on Composite Thickness Ratio in Electrically Assisted Rolling for Stainless Steel/Carbon Steel[J]. Forging & Stamping Technology, 2023, 48(9): 98-107.
[10] WU C, ZHOU Y J, LIU B.Experimental and Simulated Investigation of the Deformation Behavior and Microstructural Evolution of Ti6554 Titanium Alloy during an Electropulsing-Assisted Microtension Process[J]. Materials Science and Engineering: A, 2022, 838: 142745.
[11] 任忠凯, 李赫, 许雅楠, 等. 脉冲电场辅助碳素钢极薄带拉伸变形的本构模型和微观组织演变[J]. 机械工程学报, 2024, 60(6): 245-260.
REN Z K, LI H, XU Y N, et al.Constitutive Model and Microstructural Evolution for Tensile Behavior of Carbon Steel Ultrathin Strip under Pulsed Electric Field[J]. Journal of Mechanical Engineering, 2024, 60(6): 245-260.
[12] SALANDRO W A, BUNGET C J, MEARS L.A Thermal-Based Approach for Determining Electroplastic Characteristics[J]. Proceedings of the Institution of Mechanical Engineers, Part B: Journal of Engineering Manufacture, 2012, 226(5): 775-788.
[13] PARK H G, KANG B S, KIM J.Numerical Modeling and Experimental Verification for High-Speed Forming of Al5052 with Single Current Pulse[J]. Metals, 2019, 9(12): 1311.
[14] DONG H R, LI X Q, LI Y, et al.An Experimental and Modelling Study of Cyclic Tension-Compression Behavior of AA7075-T6 under Electrically-Assisted Condition[J]. Journal of Materials Processing Technology, 2022, 307: 117661.
[15] 刘斌, 武川, 周宇杰. Ti6554钛合金脉冲电流辅助压缩本构模型的建立及应用[J]. 精密成形工程, 2022, 14(5): 27-35.
LIU B, WU C, ZHOU Y J.Establishment and Application of Ti6554 Titanium Alloy Pulse Current Assisted Compression Constitutive Model[J]. Journal of Netshape Forming Engineering, 2022, 14(5): 27-35.
[16] CUI X, ZHAO R, WAN M.Modified Constitutive Models for Inconel 718 Considering Current Density and Temperature in Electrically Assisted Forming Process[J]. Chinese Journal of Aeronautics, 2024, 37(2): 524-540.
[17] ZHAO Y C, WAN M, MENG B, et al.Pulsed Current Assisted Forming of Ultrathin Superalloy Sheet: Experimentation and Modelling[J]. Materials Science and Engineering: A, 2019, 767: 138412.
[18] LIU Y Z, WAN M, MENG B.Multiscale Modeling of Coupling Mechanisms in Electrically Assisted Deformation of Ultrathin Sheets: An Example on a Nickel-Based Superalloy[J]. International Journal of Machine Tools and Manufacture, 2021, 162: 103689.
[19] 肖志涛, 皇涛, 邢兵辉, 等. 电流辅助成形中位错演化行为研究进展[J]. 塑性工程学报, 2023, 30(6): 88-101.
XIAO Z T, HUANG T, XING B H, et al.Research Progress on Evolutionary Behavior of Dislocation in Electrically Assisted Forming[J]. Journal of Plasticity Engineering, 2023, 30(6): 88-101.
[20] SHEIKH-AHMAD J Y, BAILEY J A. A Constitutive Model for Commercially Pure Titanium[J]. Journal of Engineering Materials and Technology, 1995, 117(2): 139-144.
[21] 翟瑞雪, 吴庚洋, 乔铮, 等. TC4钛合金电致塑性本构方程建立[J]. 塑性工程学报, 2024, 31(3): 91-99.
ZHAI R X, WU G Y, QIAO Z, et al.Establishment of Constitutive Equation of TC4 Titanium Alloy for Electroplasticity[J]. Journal of Plasticity Engineering, 2024, 31(3): 91-99.
[22] TSKHONDIYA G A.Modeling the Effect of Multiple Pulse Treatment on Deformation Processing[J]. Journal of Physics: Conference Series, 2009, 181: 012034.
[23] MOLOTSKII M, FLEUROV V.Magnetic Effects in Electroplasticity of Metals[J]. Physical Review B, 1995, 52(22): 15829-15834.
[24] 杨世铭, 陶文铨. 传热学(第4版)[M]. 北京: 高等教育出版社, 2006.
YANG S M, TAO W Q. Heat Transfer (4th Ed.)[M]. Beijing: Higher Education Press, 2006.
基金
国家自然科学基金（U1908229,52075073）
PDF(11497 KB)
渝公网安备 50010702501719号 渝ICP备15012534号-4
