1. 1) S. Takagi and M. Kumagai, “Formation of nanocrystalline structure by fine particle bomberding”, The Japan Society for Precision Engineering, Vol.72, No.9, pp.1079-1082 (2006).
2. Surface nanocrystallization of iron induced by ultrasonic shot peening
3. 3) S. Takaki, “Limit of dislocation density and ultra-grain-refining on severe deformation in iron”, Materials Science Forum, Vol.426-432, pp.215-222 (2003).
4. 4) S. Takagi, M. Kumagai, Y. Ito, S. Konuma and E. Shimodaira, “Surface nanocrystallization of carburized steel JIS-SCr420 by fine particle peening”, Tetsu To Hagane, Vol.92, No.5, pp.24-32 (2006).
5. Nanocrystallization of Steels by Severe Plastic Deformation