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PUBLISHER
Research Article
Corrosion behavior of
fiber laser welded Ti-6Al-4V alloy rods with different pH and temperature in
0.9 wt% NaCl medium
Arife Kübra Yontar 1,3, Sinem Çevik1,2
1Department Mechanical and Metal Technologies, Ondokuz Mayis University, Samsun, Turkey
2Ondokuzmayıs University, Metallurgical and Materials Engineering Department, Samsun, Turkey
3Department of Nanoscience and Nanotechnology, Ondokuz Mayis University, Samsun, Turkey
Keywords
Abstract
Ti-6Al-4V alloys;
Fiber laser welding;
Corrosion resistance;
NaCl solution;
Weight changes
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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