Constitutive relationship analysis and microstructural evolution of biomedical Ni-Ti alloy during warm deformation

Zhu Shaozhen; Wang Jie

doi:10.7513/j.issn.1004-7638.2022.06.008

Volume 43 Issue 6

Jan. 2023

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Zhu Shaozhen, Wang Jie. Constitutive relationship analysis and microstructural evolution of biomedical Ni-Ti alloy during warm deformation[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 51-57. doi: 10.7513/j.issn.1004-7638.2022.06.008

Citation:

Zhu Shaozhen, Wang Jie. Constitutive relationship analysis and microstructural evolution of biomedical Ni-Ti alloy during warm deformation[J]. IRON STEEL VANADIUM TITANIUM, 2022, 43(6): 51-57. doi: 10.7513/j.issn.1004-7638.2022.06.008

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Constitutive relationship analysis and microstructural evolution of biomedical Ni-Ti alloy during warm deformation

doi: 10.7513/j.issn.1004-7638.2022.06.008

Zhu Shaozhen^{1, 2
,},
Wang Jie³

1.
Xi'an Noble Rare Metal Materials Co., Ltd., Xi'an 710201, Shaanxi, China
2.
Western Metal Materials Co., Ltd., Xi'an 710201, Shaanxi, China
3.
School of Materials Science and Engineering, Shenyang Aerospace University, Shenyang 110136, Liaoning, China

Received Date: 2022-06-02
Publish Date: 2023-01-13

Abstract

Abstract

In order to study warm deformation behavior of the biomedical Ni-Ti alloy, compression tests were performed on a Gleeble-3800 thermal simulator. The true stress-true strain curves were obtained. The constitutive relationship and microstructures evolution during the deformation were analyzed. The processing map was established and optimum parameters for warm deformation were determined. The results show that dynamic recovery and recrystallization are the main softening mechanism during compression. Dynamic recovery occurs when 30≤lnZ≤42 and recrystallization occurs when 23≤lnZ≤26. According to the microstructural analysis and processing map, the alloy shows better workability and fine recrystallized microstructures at low strain rates and high deformation temperatures. And the optimum deformation parameters of the alloy were determined as follows: domain 1 occurs in the temperature range of 935-1 045 K and the strain rate range of 0.001-0.004 s⁻¹, and domain 2 occurs in the deformation temperature range of 1 045-1 073 K and strain rate range of 0.003-0.03 s⁻¹.
- biomedical Ni-Ti alloy,
- hot compression deformation,
- constitutive equation,
- processing map,
- microstructure

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References(18)

References

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