Multi-physical Coupled Tensile Deformation Behavior of Industrial Pure Titanium TA1

ZHENG Shilong; ZHANG Bao; ZU Yufei; FU Xuesong; ZHOU Wenlong; CHEN Guoqing

doi:10.3969/j.issn.1674-6457.2025.08.003

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Journal of Netshape Forming Engineering ›› 2025, Vol. 17 ›› Issue (8) : 25-34. DOI: 10.3969/j.issn.1674-6457.2025.08.003

Light Alloy Forming

Multi-physical Coupled Tensile Deformation Behavior of Industrial Pure Titanium TA1

ZHENG Shilong, ZHANG Bao, ZU Yufei, FU Xuesong, ZHOU Wenlong, CHEN Guoqing^*

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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.

Key words

industrial pure titanium / electric pulse-assisted forming / deformation behavior / constitutive equation / finite element simulation

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ZHENG Shilong, ZHANG Bao, ZU Yufei, FU Xuesong, ZHOU Wenlong, CHEN Guoqing. Multi-physical Coupled Tensile Deformation Behavior of Industrial Pure Titanium TA1[J]. Journal of Netshape Forming Engineering. 2025, 17(8): 25-34 https://doi.org/10.3969/j.issn.1674-6457.2025.08.003

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