“…Nao UEHATA, 1) Motomichi KOYAMA, 1) * Shusaku TAKAGI 2) and Kaneaki TSUZAKI 1) 1) Department of Mechanical Engineering, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, Fukuoka, 819-0395 Japan. 2) Steel Research Laboratory, JFE Steel Corporation, 2-3, Uchisaiwai-cho 2-chome, Chiyoda-ku, Tokyo, 100-0011 Japan.…”