Interlayer Laser Cladding Sic Cermet to Controlcorrosion Performance of Titanium Alloy Arc Additive Manufacturing Components

Abstract

A new preparation technology for titanium matrix composites was proposed: interlayer laser cladding of SiC ceramic particles is carried out during the process of arc directed energy deposition (ADED) technology for preparing Ti-6Al-4V additive manufacturing components. This technology is named laser cladding-arc directed energy deposition (LC-ADED). The microstructure and electrochemical properties of the ADED specimens and LC-ADED specimens were analyzed, and the corrosion resistance mechanism was discussed. During the LC-ADED process, the growth of α phase and prior-β grains is hindered by the precipitated eutectic TiC and Ti5Si3. The results of open circuit potential, polarization curve and EIS are in accordance. In terms of the corrosion resistance change trend, the order from large to small is as follows: the top LC-ADED specimens> the bottom LC-ADED specimens > the top ADED specimens > the bottom ADED specimens. Overall, the LC-ADED specimens exhibit excellent corrosion resistance.

Keywords: Ti6Al4V alloys, SiC cermet, corrosion performance, Laser cladding, arc-directed energy deposition