Abstract
This paper presents the results of a study on the high-temperature oxidation characteristics after mechanical and laser removal of TA15 titanium alloy oxide film. The morphology, components, and roughness of the surface were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and laser confocal microscope (OM). The oxide film can be effectively removed with mechanical grinding and laser cleaning, and the oxide film after mechanical grinding is thicker and looser than that of after laser cleaning. The oxide film is principally composed of TiO2, Ti2O3 and TiO. Besides, there is a small amount of aluminum oxide on the surface. The surface after mechanical grinding was rougher than that of after laser cleaning. Thus, this work indicates that laser can not only clean the oxide film completely, but also strengthen the surface, which is a promising way to favor the widespread application of laser cleaning technology.
Highlights
Titanium, a very reactive metal, is easy to form oxide film with, which has characteristics of being thin, stable, adherent and compact, and is often applied in aerospace, chemical, medical and electrochemical industries [1,2,3,4]
The high-temperature oxidation behavior of TA15 titanium alloy was studied by comparing the changes of oxide film composition and morphology after oxidation
The scratches were formed on the TA15 titanium alloy surface after silicon carbide (SiC) paper removal of the original oxide film
Summary
A very reactive metal, is easy to form oxide film with, which has characteristics of being thin, stable, adherent and compact, and is often applied in aerospace, chemical, medical and electrochemical industries [1,2,3,4]. Yao Lu [15] found that the surface roughness and corrosion resistance of the AH36 steel were, respectively, reduced and increased after laser cleaning. 120 W mopa pulsed fiber laser to remove the oxide film on aluminum alloy, and the tensile and bending properties were improved. The corrosion resistance of carbon steel plates was improved for denser iron oxide formed when higher laser power density was irradiated. Surface roughness after laser cleaning played an important role in the machinability and corrosion resistance of materials. There is no detailed study on the oxidation resistance of the material surface by laser cleaning. We first applied silicon carbide (SiC) paper and laser to remove natural oxide films on TA15 titanium alloy. The surface oxidation behavior of titanium alloy after mechanical grinding and laser cleaning was analyzed
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