1. School of Mechanical Engineering, Chonnam University, 77, Yongbong-ro, Buk-gu, Gwangju 61186, Republic of Korea
2. Automotive Materials & Components R&D Group, Korea Institute of Industrial Technology, 6, Cheomdangwagi-ro 208beon-gil, Buk-gu, Gwangju 31056, Republic of Korea