Surface hardness and corrosion behavior of laser surface-alloyed Ti6Al4V with copper

Qiao, Q.; Tam, Lap Mou; Cristino, V.A.M.; Kwok, Chi Tat

doi:10.1016/j.surfcoat.2022.128663

Cited by 15 publications

(1 citation statement)

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“…Various corrosion tests have already been carried out on implant materials and titanium alloys in the literature, using methods such as open circuit potential (OCP), potentiodynamic and potentiostatic tests, and electrochemical impedance spectroscopy (EIS) [38][39][40]. Again, in these studies, corrosion behavior was investigated by using 0.9 wt wt% NaCl, Kroll or Hank solutions [41][42][43][44]. However, there are currently no studies carried out by creating a naturally corrosive environment after fiber laser welding of Ti-6Al-4V (Gr5) alloys in rod form.…”

Section: Introductionmentioning

confidence: 99%

Corrosion behavior of fiber laser welded Ti-6Al-4V alloy rods with different pH and temperature in 0.9 wt% NaCl medium

Yontar,

Çevik

2023

Res. Eng. Struct. Mat.

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The corrosion resistance of laser welded samples was carried out in a shaken incubator in body-simulated liquid environments and kept at pH3-5 and 25-50˚C conditions for 24 hours. It was determined that acicular α' martensite structures were formed in the fusion regions and these structures increased the hardness of the alloy by 20% compared to the base metal. The welded samples had the highest tensile strength of 144 MPa. Weight changes after the corrosion test were calculated and the highest weight loss was found to be 0.0025 g for the sample with an initial weight of 4.1394 g. TiO2 oxides and {1 0 0} and {1 1 1} chamber-shaped salt crystals were formed larger and more intensely in the fusion zones than the base metal. Dental metallic implant welding with fiber laser will have higher corrosion resistance in oral use with different temperature and pH environments compared to screw joints.

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