Effect of Ta on microstructure and corrosion resistance of TA23 alloy

Sang Biao; Han Wenwu; Li Le; Wang Qi

doi:10.7513/j.issn.1004-7638.2021.01.012

Volume 42 Issue 1

Feb. 2021

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Sang Biao, Han Wenwu, Li Le, Wang Qi. Effect of Ta on microstructure and corrosion resistance of TA23 alloy[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 70-74. doi: 10.7513/j.issn.1004-7638.2021.01.012

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Sang Biao, Han Wenwu, Li Le, Wang Qi. Effect of Ta on microstructure and corrosion resistance of TA23 alloy[J]. IRON STEEL VANADIUM TITANIUM, 2021, 42(1): 70-74. doi: 10.7513/j.issn.1004-7638.2021.01.012

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Effect of Ta on microstructure and corrosion resistance of TA23 alloy

doi: 10.7513/j.issn.1004-7638.2021.01.012

School of Mechanical and Energy Engineering, Huanghuai University, Zhumadian 463000, Henan, China

Received Date: 2020-03-23
Publish Date: 2021-02-10

Abstract

Abstract

The effect of Ta element on the microstructure, phase compositions, microhardness and corrosion resistance of TA23 alloy was investigated by means of optical microscopy, X-ray diffraction, Vickers hardness tester and electrochemical workstation. The results show that the proportion of primary α phase increases to some extent and the proportion of secondary α phase decreases obviously in the alloy with Ta added. The X-ray diffraction indicates that there is no new phase identified in the alloy after addition of Ta. At 0.5% of Ta in the alloy, the peak intensity of (10-11) α increases significantly. The microhardness of TA23 decreases slowly as the Ta content increases, which is attributed to the increase of soft α phase in the alloy with Ta added. The potentiodynamic polarization curves suggest that after addition of Ta element, the corrosion resistance of TA23 alloy is improved. When the Ta content is 0.5%, the size of primary α phase increases, which reduces the formation of corrosion battery and improves the corrosion resistance of titanium alloy in seawater.
- TA23,
- microstructure,
- microhardness,
- potentiodynamic polarization curve,
- corrosion resistance

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References(16)

References

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