Effect of hot deformation parameters on the rheological behavior of two-phase region of titanium alloy

Fu Wen; Zhou Xiaofeng; Li Chengning; Cheng Fangjie; Wang Dongpo

doi:10.7513/j.issn.1004-7638.2021.06.010

Volume 42 Issue 6

Dec. 2021

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Fu Wen, Zhou Xiaofeng, Li Chengning, Cheng Fangjie, Wang Dongpo. Effect of hot deformation parameters on the rheological behavior of two-phase region of titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 78-83. doi: 10.7513/j.issn.1004-7638.2021.06.010

Citation:

Fu Wen, Zhou Xiaofeng, Li Chengning, Cheng Fangjie, Wang Dongpo. Effect of hot deformation parameters on the rheological behavior of two-phase region of titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 78-83. doi: 10.7513/j.issn.1004-7638.2021.06.010

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Effect of hot deformation parameters on the rheological behavior of two-phase region of titanium alloy

doi: 10.7513/j.issn.1004-7638.2021.06.010

Fu Wen^1
,,
Zhou Xiaofeng^{1, 2},
Li Chengning^{1, 3},
Cheng Fangjie^{1, 3
,
,},
Wang Dongpo^{1, 3}

1.
School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China
2.
Tianjin Pipe (Group) Corporation, Tianjin 300301, China
3.
Tianjin Key Laboratory of Advanced Joining Technology, Tianjin 300350, China

Received Date: 2021-05-13
Publish Date: 2021-12-31

Abstract

Abstract

Hot-rolled Ti80 alloy was used as the substrate, and the high temperature compression test was carried out on the Gleeble-3500 thermal simulation tester. The deformation temperature was 800～1 000 ℃, the strain rate was 0.01～10 s⁻¹, and the total deformation ratio was 75%. The results show that the phase of Ti80 titanium alloy was in the α+β two-phase region at 800～950 ℃, and its rheological behavior was significantly affected by the deformation temperature and strain rate. The work hardening of Ti80 titanium alloy mainly came from the increase of the dislocation density in the initial α phase. The increase of the deformation temperature led to the decrease of the α phase, and the rheological peak stress continued to decrease. And the excessively high strain rate restrained the movement of the dislocations in the α phase. The initial α phase in Ti80 titanium alloy was more prone to dynamic recovery and dynamic recrystallization. As the deformation temperature increased, the initial α phase continued to decrease, and the dynamic softening degree gradually decreased until it approached zero. In order to ensure the stability of the hot rolling of the titanium tube, the deformation temperature should be appropriately increased for obtaining a higher β phase volume fraction of the hot deformed structure in the Ti80 titanium alloy, and avoiding the excessive rolling load caused by the excessively high strain rate.
- titanium alloy tube,
- hot rolling,
- deformation temperature,
- strain rate,
- two-phase region,
- rheological behavior

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References(13)

References

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