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Surface hardness and corrosion behavior of laser surface-alloyed Ti6Al4V with copper
Qiao, Q.1; Tam, L. M.1,2; Cristino, V. A.M.1; Kwok, C. T.1,3
2022-06
Source PublicationSurface and Coatings Technology
ISSN0257-8972
Volume444
Abstract

Laser surface alloying of Ti6Al4V with different Cu contents (6, 8, 13 and 17 wt%) was successfully achieved using a high-power diode laser. With a higher Cu content, the grain size of the laser surface-alloyed Ti6Al4V specimens became finer, with more intermetallic phases (IMPs) formed and the hardness increased up to 646 ± 18 HV. Potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) were conducted to study the corrosion behavior of the laser surface-alloyed specimens in a 0.9 wt% NaCl solution at 37 °C. It was found that the specimen alloyed with 6 wt% Cu showed the mild micro-galvanic effect between CuTi and α-Ti. The specimen with 17 wt% Cu had the highest content of IMPs and possessed the lowest corrosion resistance due to the most significant micro-galvanic effect between the IMPs (cathode) and the α-T / β-Ti matrix (anodes). With an appropriate Cu content, laser surface-alloyed Ti6Al4V can also act as hard and corrosion resistant components possessing a high anti-bacterial efficacy by virtue of Cu.

KeywordCopper Corrosion Hardness Laser Surface Alloying Ti6al4v
DOI10.1016/j.surfcoat.2022.128663
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaMaterials Science ; Physics
WOS SubjectMaterials Science, Coatings & Films ; Physics, Applied
WOS IDWOS:000828502100003
Scopus ID2-s2.0-85133890872
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Cited Times [WOS]:0   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionDEPARTMENT OF ELECTROMECHANICAL ENGINEERING
Corresponding AuthorKwok, C. T.
Affiliation1.Department of Electromechanical Engineering, University of Macau, Macao
2.Institute for Development and Quality, Macao
3.Institute of Applied Physics and Materials Engineering, University of Macau, Macao
First Author AffilicationUniversity of Macau
Corresponding Author AffilicationUniversity of Macau;  INSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Qiao, Q.,Tam, L. M.,Cristino, V. A.M.,et al. Surface hardness and corrosion behavior of laser surface-alloyed Ti6Al4V with copper[J]. Surface and Coatings Technology,2022,444.
APA Qiao, Q.,Tam, L. M.,Cristino, V. A.M.,&Kwok, C. T..(2022).Surface hardness and corrosion behavior of laser surface-alloyed Ti6Al4V with copper.Surface and Coatings Technology,444.
MLA Qiao, Q.,et al."Surface hardness and corrosion behavior of laser surface-alloyed Ti6Al4V with copper".Surface and Coatings Technology 444(2022).
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