3:10 PM - 3:25 PM
○Koji Nakamaura2, Tomoyasu Kamogawa2, Yasutaka Mugita2, Masatoshi Aramaki1, Kosuke Ashizuka3, Yukiko Ozaki1 (1. Department of Material Science and Engineering, Kyushu University, 2. Master Course of Material Science and Engineering, Kyushu University, 3. JFE Steel Co.)