1. Department of Mechanical EngineeringAndong National University, 1375 Gyeongdongro, Andong, Gyeongbuk 760-749, Korea
2. Aerospace PortfolioNational Research Council Canada , 1200 Montreal Road, Ottawa, ON K1A 0R6, Canada
3. Department of Mechanical and Aerospace EngineeringCarleton University, 1125 Colonel By Drive, Ottawa, ON K1S 5B6, Canada
4. Titanium DepartmentKorea Institute of Materials Science, 797 Changwondaero, Changwon, Gyeongnam 642-831, Korea
5. UES Inc. 4401 Dayton Xenia Road, Dayton, OH 45432, USA