[G] 固相プロセス 固相・溶接プロセス

[70] Grain structure control of Direct Energy Deposited Ti-6Al-4V alloy with a wide range of processing parameters

*Lingxiao OUYANG¹, Yufan Zhao², Yuji Imamiya³, Kenta Aoyagi², Akihiko Chiba² (1. Tohoku Univ.、2. IMR, Tohoku Univ.、3. Mitsubishi Heavy Industries Machine Group.)

キーワード：Directed Energy Deposition、Ti-6Al-4V、Grain structure control、Columnar to equiaxed transition

The CtFD simulations provide us real-time temperature gradient G and solidification rate R during the solidification and we use the ratio of to G/R and G×R to control grain structure.