Study on high-temperature tensile deformation behavior of TA9 titanium alloy

Dong Xiaofeng; Wang Guanjun; Zhang Mingyu; Yang Zaijiang; Yang Xuexin; Ye Hongchuan; Gao Tian

doi:10.7513/j.issn.1004-7638.2023.02.011

Volume 44 Issue 2

Apr. 2023

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Dong Xiaofeng, Wang Guanjun, Zhang Mingyu, Yang Zaijiang, Yang Xuexin, Ye Hongchuan, Gao Tian. Study on high-temperature tensile deformation behavior of TA9 titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(2): 77-83. doi: 10.7513/j.issn.1004-7638.2023.02.011

Citation:

Dong Xiaofeng, Wang Guanjun, Zhang Mingyu, Yang Zaijiang, Yang Xuexin, Ye Hongchuan, Gao Tian. Study on high-temperature tensile deformation behavior of TA9 titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(2): 77-83. doi: 10.7513/j.issn.1004-7638.2023.02.011

Citation:

Dong Xiaofeng, Wang Guanjun, Zhang Mingyu, Yang Zaijiang, Yang Xuexin, Ye Hongchuan, Gao Tian. Study on high-temperature tensile deformation behavior of TA9 titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2023, 44(2): 77-83. doi: 10.7513/j.issn.1004-7638.2023.02.011

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Study on high-temperature tensile deformation behavior of TA9 titanium alloy

doi: 10.7513/j.issn.1004-7638.2023.02.011

1.
Xinjiang Xiangrun New Materials Technology Co., Ltd., Hami 839000, Xinjiang, China
2.
Xinjiang Key Laboratory of Titanium-based New Materials, Hami 839000, Xinjiang, China
3.
Engineering Research Center of Continuous Extrusion, Dalian Jiaotong University, Dalian 116028, Liaoning, China
4.
32319 Troops, Urumqi 830000, Xinjiang, China

More Information

Received Date: 2022-09-22
Publish Date: 2023-04-30

Abstract

Abstract

The true stress-true strain curves of TA9 titanium alloy in the temperature range of 800-920 ℃ and the strain rate range of 0.001-0.125 s⁻¹ were obtained by high-temperature tensile test. The relationship among deformation temperature, strain rate, and flow stress under tensile stress is analyzed. The constitutive analysis based on the hyperbolic-sine Arrhenius equation was constructed, and the strain correction was carried out. The hot processing maps of 20% and 50% deformation were drawn, and the microstructure evolution of the alloy under different deformation conditions was studied. The results show that the flow stress decreases with the deformation temperature increase and the strain rate decrease. The constitutive equation calculates the deformation activation energy in the two-phase region to be 569.453 kJ/mol. There are four central regions of instability in the hot processing map. The instability region in the hot processing map mainly has four regions, which are at 800-845 ℃ and 870-920 ℃, and the strain rate is more significant than 0.07 s⁻¹ and 0.002-0.03 s⁻¹, respectively. In addition, the α phase in the microstructure of the fracture position is elongated along the direction of the alloy deformation, and the α grain boundary becomes serrated, which is related to the fragmentation, segmentation, and grain boundary protrusion of α along the subgrain boundary during the dynamic recovery process. The equiaxed α grain size decreases with the increase in strain rate when the deformation temperature is constant. The equiaxed α grain size increases with the increase in temperature when the strain rate is constant.
- TA9 titanium alloy,
- high temperature tensile,
- constitutive equations,
- thermal processing map,
- microstructure

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References(20)

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