1. Department of Steels, Advanced Metals Division, Korea Institute of Materials Science, 797 Changwondae-ro, Seongsan-gu, Changwon, Gyeongnam 51508, Republic of Korea
2. Research & Development (R & D) center, Hyundai Steel Company, 1480, Bukbusaneop-ro, Songak-Eup, Dangjin-Si, Chungnam 31719, Republic of Korea