Surface reinforcements of TA15 titanium alloy with laser induced Co base multiphase composites

•SNCs reinforced HEAs base composites were formed;•Growth of TiB2/TiB may be retarded by Sb, resulting in SNCs;•Lots of UPs were produced in atomic arrangements of APs/MGOSs;•Ultrafine nano structure of the reinforcing phase was retained. Ultrafine particles (UPs)/amorphous phases (APs) reinforced c...

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Bibliographic Details
Published in:Optics and laser technology 2020-12, Vol.132, p.106480, Article 106480
Main Authors: Li, Jianing, Ye, Zhiyun, Jing, Cainian, Xu, Shubo, Yu, Fusheng, Liu, Kegao, Sun, Xigui, Liu, Shushuai, Cao, Fan, Liu, Liqiang, Wang, Xiaolin
Format: Article
Language:English
Subjects:
Aluminum boron carbide
Amorphous phase
Carbon nanotubes
Cerium oxides
Composites
Electrons
Graphene
Graphene oxides
Laser beam cladding
Lasers
Particulate composites
Three dimensional composites
Three dimensional printing
Titanium alloys
Titanium base alloys
Ultrafines
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Summary:•SNCs reinforced HEAs base composites were formed;•Growth of TiB2/TiB may be retarded by Sb, resulting in SNCs;•Lots of UPs were produced in atomic arrangements of APs/MGOSs;•Ultrafine nano structure of the reinforcing phase was retained. Ultrafine particles (UPs)/amorphous phases (APs) reinforced composites was deposited on the TA15 titanium alloy via a laser cladding (LC) of the Co-Al-B4C-CeO2 mixed powders; a LC technique (the laser power 900 W, the scanning speed 2.5 mm/s) favored APs/UPs to be produced owing to the transient existence of the laser molten pool (laser pool), its COF was in a range of 0.390–0.425. Then, the monolayer graphene oxide sheets (MGOSs)/carbon nanotubes (CNTs) reinforced composites were formed on this LC fabricated coating by a mean of LC of Co-Al-B4C-CeO2-(MGOSs/CNTs). Noting that a laser beam irradiated on MGOSs/CNTs also the pre-melted powders, huge amounts of MGOSs/CNTs were melted but kept partial MGOSs/CNTs in the solid states; also lots of UPs were produced in the atomic arrangements of APs/MGOSs, considering that partial UPs could obtain large quantity of the energy from a laser beam, forming lattice distortions. Identification of the synthetic UPs and MGOSs/CNTs in such LC composites, more importantly an UPs’ effect, contributes the theoretical/experimental basis to improve quality of the laser 3D print fabricated composites.
ISSN:0030-3992
1879-2545
DOI:10.1016/j.optlastec.2020.106480