Microstructure evolution and elevated temperature wear performance of in-situ laser-synthesized Ti-25Al-17Nb coating on Ti-6Al-4V
Microstructure evolution and elevated temperature wear performance of in-situ laser-synthesized Ti-25Al-17Nb coating on Ti-6Al-4V
A ternary Ti-25Al-17 Nb coating (89.5 vol. % O phase and 4.3 vol. % α2 phase) was fabricated from the pre-alloyed powder by in-situ laser synthesis. The powder was laser scanned to form α2 phase at high temperature and subsequently precipitated primary Ti2AlNb phase (O phase) in an acicular structure; while the secondary fine acicular O phase was squeezed due to the expansion of α2 phase with induced some edge dislocations and mixed dislocations. The dense and hard Al2O3 film gradually replaced the loose and porous TiO2 oxide film as an oxygen diffusion barrier, thereby reducing the possibility of brittle oxide formation and significantly increasing the wear resistance and oxidation resistance, results in an excellent wear resistance at 800 ℃.
High temperature wear performance, Laser in-situ synthesis, O-based alloys, Ti-25Al-17 Nb coating
Li, Wensheng
9483fd8e-f3d4-48b8-8a75-14ff5fc5d9e5
Zhang, Wenbin
9936b8d7-caa5-4826-a0e1-b47d687245ec
Zhai, Haimin
9831578f-7ef7-42ea-b540-f3543537e7fd
Wang, Shuncai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Song, Qiang
0e63963e-ca53-43ad-bd0b-1524ec77c389
Wood, Robert J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Cheng, Bo
b3fe2d6d-5cb6-4861-aa34-8c1e506de077
He, Dongqing
1665ca9b-317f-4270-867b-1721776e74b9
Zhang, Chunzhi
1c821d0d-91bc-4098-b04b-81a2a877535c
27 July 2022
Li, Wensheng
9483fd8e-f3d4-48b8-8a75-14ff5fc5d9e5
Zhang, Wenbin
9936b8d7-caa5-4826-a0e1-b47d687245ec
Zhai, Haimin
9831578f-7ef7-42ea-b540-f3543537e7fd
Wang, Shuncai
8a390e2d-6552-4c7c-a88f-25bf9d6986a6
Song, Qiang
0e63963e-ca53-43ad-bd0b-1524ec77c389
Wood, Robert J.K.
d9523d31-41a8-459a-8831-70e29ffe8a73
Cheng, Bo
b3fe2d6d-5cb6-4861-aa34-8c1e506de077
He, Dongqing
1665ca9b-317f-4270-867b-1721776e74b9
Zhang, Chunzhi
1c821d0d-91bc-4098-b04b-81a2a877535c
Li, Wensheng, Zhang, Wenbin, Zhai, Haimin, Wang, Shuncai, Song, Qiang, Wood, Robert J.K., Cheng, Bo, He, Dongqing and Zhang, Chunzhi
(2022)
Microstructure evolution and elevated temperature wear performance of in-situ laser-synthesized Ti-25Al-17Nb coating on Ti-6Al-4V.
Tribology International, 175, [107807].
(doi:10.1016/j.triboint.2022.107807).
Abstract
A ternary Ti-25Al-17 Nb coating (89.5 vol. % O phase and 4.3 vol. % α2 phase) was fabricated from the pre-alloyed powder by in-situ laser synthesis. The powder was laser scanned to form α2 phase at high temperature and subsequently precipitated primary Ti2AlNb phase (O phase) in an acicular structure; while the secondary fine acicular O phase was squeezed due to the expansion of α2 phase with induced some edge dislocations and mixed dislocations. The dense and hard Al2O3 film gradually replaced the loose and porous TiO2 oxide film as an oxygen diffusion barrier, thereby reducing the possibility of brittle oxide formation and significantly increasing the wear resistance and oxidation resistance, results in an excellent wear resistance at 800 ℃.
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Accepted/In Press date: 22 July 2022
e-pub ahead of print date: 23 July 2022
Published date: 27 July 2022
Additional Information:
Funding Information: the work is supported by National Natural Science Foundation of China ( 52075234, 51901092 ), Major Special Projects of Gansu Province ( 21ZD4WA017 ), University Industry Transformation Promotion Project of Gansu ( 2020C-11 ), and the program of Science and Technology International Cooperation Demonstrative Base of Metal Surface Engineering along the Silk Road ( 2017D01003 ) and the “111” project ( D21032 ).
Keywords:
High temperature wear performance, Laser in-situ synthesis, O-based alloys, Ti-25Al-17 Nb coating
Identifiers
Local EPrints ID: 468974
URI: http://eprints.soton.ac.uk/id/eprint/468974
ISSN: 0301-679X
PURE UUID: 92a5a598-5ed8-4c41-8886-8614f65a70db
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Date deposited: 02 Sep 2022 18:43
Last modified: 23 Jul 2024 04:01
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Author:
Wensheng Li
Author:
Wenbin Zhang
Author:
Haimin Zhai
Author:
Qiang Song
Author:
Bo Cheng
Author:
Dongqing He
Author:
Chunzhi Zhang
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