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In this study, the effects of melt titanium content on the grain structure and mechanical properties of Al-5Ti-B-modified alloy 2618 were investigated. The results showed that when the titanium content in the melt was zero, the best modification effects were obtained when the amount of Al-5Ti-B added was 1.5 wt.%. When the amount of Al-5Ti-B added was fixed at 0.5 wt.%, the best modification effects were obtained when the melt titanium content was 0.05 wt.%. When the final titanium content of alloy 2618 was fixed at 0.1 wt.%, the best modification effect was obtained when the melt titanium content was fixed at 0.03 wt.% and the alloy was modified with 1.4 wt.% Al-5Ti-B. Considering the production cost and excellent modification effects, the optimal melting and modification treatment process for alloy 2618 are as follows: an alloy melt titanium content of 0.05 wt.% and an alloy modified with 0.5 wt.% Al-5Ti-B.

Effects of melt titanium content on the grain structure and mechanical properties of Al-5Ti-B-modified alloy 2618