In Situ Wire plus Powder Synchronous Arc Additive Manufacturing of Ti-Cu Alloys

In this study, a new wire + powder synchronous arc additive manufacturing technique was used to manufacture Ti-Cu alloys. The microstructure and properties of the as-fabricated alloys were studied. The results showed that the prepared Ti-Cu alloys have good properties. The Cu with high growth restriction factor can increase the constitutional supercooling zone in the Ti-Cu alloys, which can override the negative effect of a high thermal gradient in the manufacturing process. Through the observation of the microstructure, the as-printed Ti-Cu alloy specimens have equiaxed fine-grained microstructure. Through corrosion performance analysis, the Cu can also make the passivation film of the alloy more compact and make the alloy more corrosion resistant.

Automated summary

In this study, a new wire + powder synchronous arc additive manufacturing technique was used to fabricate Ti-Cu alloys. The microstructure and properties of the as-fabricated alloys were investigated. The results demonstrated that the prepared Ti-Cu alloys exhibited good properties. The presence of Cu with high growth restriction factor created a larger constitutional supercooling zone in the Ti-Cu alloys, which counteracted the detrimental effect of high thermal gradient during the manufacturing process. The as-printed Ti-Cu alloy specimens exhibited equiaxed fine-grained microstructure, as observed through microstructure analysis. Moreover, Cu also improved the compactness of the passivation film and enhanced the corrosion resistance of the alloy, as determined by corrosion performance analysis.