Effect of annealing temperature on microstructure and properties of Ti-0.3Mo-0.8Ni titanium alloy sheet

Chen Rong

doi:10.7513/j.issn.1004-7638.2021.04.011

Volume 42 Issue 4

Aug. 2021

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Chen Rong. Effect of annealing temperature on microstructure and properties of Ti-0.3Mo-0.8Ni titanium alloy sheet[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 62-67. doi: 10.7513/j.issn.1004-7638.2021.04.011

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Chen Rong. Effect of annealing temperature on microstructure and properties of Ti-0.3Mo-0.8Ni titanium alloy sheet[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(4): 62-67. doi: 10.7513/j.issn.1004-7638.2021.04.011

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Effect of annealing temperature on microstructure and properties of Ti-0.3Mo-0.8Ni titanium alloy sheet

doi: 10.7513/j.issn.1004-7638.2021.04.011

Chen Rong

Pangang Group Research Institute Co., Ltd., Sichuan Panyan Testing Technology Co., Ltd., Panzhihua 617000, Sichuan, China

Received Date: 2021-01-26
Publish Date: 2021-08-10

Abstract

Abstract

The effect of annealing temperature on microstructure and properties of 6 mm Ti-0.3Mo-0.8Ni titanium sheet was studied. The results show that at 600～700 ℃, the recrystallization of α phase occurs and chain-like Ti₂Ni particles are formed along the grain boundary, accompanying a decrease in the yield strength and tensile strength, with the elongation increasing first and then decreasing. A maximum 22.5% of the elongation can be obtained at 650 ℃, and the mechanical properties decrease significantly with the increase in amount of the particles. At 750～850 ℃, α phase transforms from partial recrystallization structure to complete recrystallization structure, and the β phase changes from long strip to block structure, with the yield strength, tensile strength and elongation after fracture decreased gradually. And the worst mechanical properties far below the standard are obtained at 850 ℃. The annealing temperature suitable for 6 mm Ti-0.3Mo-0.8Ni titanium sheet was determined at 600～650 ℃.
- Ti-0.3Mo-0.8Ni,
- annealing temperature,
- Ti₂Ni,
- β transformation,
- elongation

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References(9)

References

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