Effect of oxygen content on microstructure and mechanical properties of TC4 ELI titanium alloy bar

Ma Lan; Yang Shaoli; Li Junhan; Zou Xinyi; Wan Xin

doi:10.7513/j.issn.1004-7638.2021.06.020

Volume 42 Issue 6

Dec. 2021

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Ma Lan, Yang Shaoli, Li Junhan, Zou Xinyi, Wan Xin. Effect of oxygen content on microstructure and mechanical properties of TC4 ELI titanium alloy bar[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 142-146. doi: 10.7513/j.issn.1004-7638.2021.06.020

Citation:

Ma Lan, Yang Shaoli, Li Junhan, Zou Xinyi, Wan Xin. Effect of oxygen content on microstructure and mechanical properties of TC4 ELI titanium alloy bar[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(6): 142-146. doi: 10.7513/j.issn.1004-7638.2021.06.020

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Effect of oxygen content on microstructure and mechanical properties of TC4 ELI titanium alloy bar

doi: 10.7513/j.issn.1004-7638.2021.06.020

Ma Lan^{1, 2
,},
Yang Shaoli^{1, 2},
Li Junhan^{1, 2},
Zou Xinyi¹,
Wan Xin¹

1.
College of Vanadium and Titanium, Panzhihua University, Panzhihua 617000, Sichuan, China
2.
Key Laboratory of Comprehensive Utilization of Vanadium and Titanium Resources in Sichuan, Panzhihua 617000, Sichuan, China

Received Date: 2021-10-19
Publish Date: 2021-12-31

Abstract

Abstract

By using two self-prepared TC4 alloy ingots with different oxygen content, the high-performance TC4 ELI titanium alloy bars are prepared by the processes of cogging-forging-annealing for interstitial impurities well below GB/T 13810—2017 and UNS R56401 requirements. The properties are investigated via chemical analysis, metallurgical microscopy, tensile tests and scanning electron microscopy (SEM). The results show that after process of blooming-forging-annealing, the contents of interstitial elements such as oxygen, nitrogen and hydrogen in titanium alloy bar are significantly lower than these in ingot, and the oxygen contents for two kinds of bar are less than 0.07%. The mechanical properties of the resulted bar are not affected by oxygen content, showing high strength and plasticity. The static tension shows plastic fracture. The microstructure of the bar is mainly composed of equiaxed, bimodal and basket-weave microstructure.
- TC4 ELI titanium alloy,
- bar,
- oxygen content,
- microstructure,
- tensile properties,
- fracture microstructure

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References(9)

References

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