Study on the hydride precipitation orientation in Ti-2Al-2.5Zr titanium alloy

GUO Nan; ZHANG Jiahao; XU Qi; ZHANG Hengquan; WANG Zeming; CHEN Jiahao; YAO Lifu

doi:10.7513/j.issn.1004-7638.2025.06.010

Volume 46 Issue 6

Dec. 2025

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GUO Nan, ZHANG Jiahao, XU Qi, ZHANG Hengquan, WANG Zeming, CHEN Jiahao, YAO Lifu. Study on the hydride precipitation orientation in Ti-2Al-2.5Zr titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 84-89. doi: 10.7513/j.issn.1004-7638.2025.06.010

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GUO Nan, ZHANG Jiahao, XU Qi, ZHANG Hengquan, WANG Zeming, CHEN Jiahao, YAO Lifu. Study on the hydride precipitation orientation in Ti-2Al-2.5Zr titanium alloy[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(6): 84-89. doi: 10.7513/j.issn.1004-7638.2025.06.010

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Study on the hydride precipitation orientation in Ti-2Al-2.5Zr titanium alloy

doi: 10.7513/j.issn.1004-7638.2025.06.010

Nuclear Power Institute of China, Chengdu 610000, Sichuan, China

More Information

Received Date: 2025-04-23
Accepted Date: 2025-06-15
Rev Recd Date: 2025-05-28

Available Online: 2025-12-31

Publish Date: 2025-12-31

Abstract

Abstract

In this paper, the effects of hydrogen content on the microstructure and hydride precipitation orientation in Ti-2Al-2.5Zr titanium alloy were investigated. The results showed that after high-temperature gas-phase hydrogen charging (mass fraction: 0.01%、0.05%), δ-phase hydrides were formed within the alloy matrix. With the increase of hydrogen content, the size and density of hydrides gradually increased. The hydrides exhibited an orientation relationship of {0001}_α//{$ {1\bar {1} 1}$}_δ, <$ {1\bar {2}10} $>_α//<110>_δ. Lattice expansion caused by hydride precipitation generated numerous dislocations in both the surrounding α-Ti matrix and the hydrides themselves and the stress at the hydride tips could transmit across grain boundaries and induce hydride formation in adjacent grains.
- Ti-2Al-2.5Zr titanium alloy,
- gas-phase hydrogen charging,
- δ phase hydrides,
- microstructure

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References(29)

References

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