1. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA, USA;
2. Department of Mechanical Engineering, Cheng Shiu University, Kaohsiung, Taiwan;
3. Metal Industries Research and Development Centre (MIRDC), Kaohsiung, Taiwan;
4. Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian, People’s Republic of China