5:00 PM - 5:20 PM [J20] Improvement of an open atmospheric nitrided titanium surface using an electric field assisted laser-induced plasma *Atsuto Yoshino1, Kaito Yonemoto2, Yoshifumi Kitadate3, Eishi Hashiba4, Mitsuhiro Hirano5, Naofumi Ohtsu6 (1. Kitami Inst. of Tech., 2. Kitami Inst. of Tech., 3. Kitami Inst. of Tech., 4. Kitami Inst. of Tech., 5. Kitami Inst. of Tech., 6. Kitami Inst. of Tech.)