• "Formation of nanocrystalline structure in carbon steels by ball drop and particle impact techniques" Materials Science and Engineering A 375-377 (2004), 899-904.
  
  
• "Formation of nanocrystalline structure in steels by severe plastic deformation" General Abstract: Electronic, and Photonic Materials Division, TMS (The Metals & Materials Society), eds: L.Qing and S.Kang. [87-93], (2007)
  Y.Todaka, M.Umemoto, C.Wang and K.Tsuchiya
  
  
• "Role of strain gradient on grain refinement by severe plastic deformation" Materials Science and Engineering A 462 [264-268], (2007)
  Y.Todaka, M.Umemoto, J.Yin, Z.Liu and K.Tsuchiya
  
  
• "Dissolution of cementite in carbon steels by ball drop deformation and laser heating" Journal of Alloys and Compounds 434-435 [497-500], (2007)
  Y.Todaka, M.Umemoto, A.Ohno, M.Suzuki Y.Kawabata and K.Tsuchiya
  
  
• "The microstructure investigation on the surface of drilled hole in carbon steels" Acta Materialia 55 [1397-1406], (2007)
  J.G.Li, M.Umemoto, Y.Todaka and K.Tsuchiya
  
  
• "Role of strain gradient on the formation of nanocrystalline structure produced by severe plastic deformation" Journal of Alloys and Compounds 434-435 [290-293], (2007)
  J.Li, M.Umemoto, Y.Todaka and K.Tsuchiya
  
  
• "Formation of surface nanocrystalline structure in steels by shot peening and role of strain gradient on grain refinement by deformation" ISIJ International 47(1) [157-162], (2007)
  Y.Todaka, M.Umemoto, Y.Watanabe, A.Yamazaki, C.Wang and K.Tsuchiya
  
  
• "Role of strain gradient and dynamic transformation on the formation of nanocrystalline structure produced by severe plastic deformation" Materials Science Forum 539-543 [2787-2792], (2007)
  M.Umemoto, Y.Todaka, J.Li and K.Tsuchiya
  
  
• "Formation of nanocrystalline structure by shot peening" Materials Science Forum 503-504 [669-674], (2006)
  Y.Todaka, M.Umemoto, Y.Watanabe and K.Tsuchiya
  
  
• "Dissolution of cementite in carbon steels by heavy deformation and laser heat treatment" Materials Science Forum 503-504 [461-466], (2006)
  M.Umemoto, Y.Todaka, A.Ohno, M.Suzuki and K.Tsuchiya
  
  
• "Nanocrystalline structure in steels produced by various severe plastic deformation processes" Materials Science Forum 503-504 [11-18], (2006)
  M.Umemoto, Y.Todaka, J.Li and K.Tsuchiya
  
  
• "Nanocrystalline structure formation in carbon steel introduced by high speed drilling" Materials Science and Engineering A 435-436 [383-388], (2006)
  J.G.Li, M.Umemoto, Y.Todaka and K.Tsuchiya
  
  
• "Nanocrystallization of carbon steels by shot peening and drilling" Reviews on Advanced Materials Science 10 [409-416], (2005)
  Y.Todaka, M.Umemoto, J.Li and K.Tsuchiya
  
  
• "Nanocrystallization of drill hole surface by high speed drilling" Journal of Metastable and Nanocrystalline Materials 24-25 [601-604], (2005)
  Y.Todaka, M.Umemoto, J.Li and K.Tsuchiya
  
  
• "Comparison of nanocrystallization in steels by ball milling, shot peening and drilling" Journal of Metastable and Nanocrystalline Materials 24-25 [571-576], (2005)
  M.Umemoto, Y.Todaka, Y.Watanabe, J.Li and K.Tsuchiya
  
  
• "Nanocrystallization of martensite steels and Ti-6Al-4V alloy by shot peening" Journal of Metastable and Nanocrystalline Materials 24-25 [471-474], (2005)
  Y.Todaka, M.Umemoto, Y.Watanabe and K.Tsuchiya
  
  
• "Nanograined steels produced by shot peening and drilling" Proceedings of the 25th Riso International Symposium on Materials Science: Evolution of Deformation Microstructures in 3D, Riso National Laboratory, Roskilde, Denmark, eds: C. Gundlach, K. Haldrup, N. Hansen, X. Huang, D. Juul Jensen, T. Leffers, Z. J. Li, S. F. Nielsen, W. Pantleon, J. A. Wert and G. Winther [551-556], (2004)
  M.Umemoto, Y.Todaka and K.Tsuchiya
  
  
• "Nanocrystallization in steels by air blast shot peening" Transactions of the Materials Research Society of Japan 29(8) [3525-3528], (2004)
  Y.Todaka, M.Umemoto, Y.Watanabe and K.Tsuchiya
  
  
• "Formation of nanocrystalline structure at the surface of drill hole in steel" Materials Transactions 45(7) [2209-2213], (2004)
  Y.Todaka, M.Umemoto, S.Tanaka and K.Tsuchiya
  
  
• "Formation of nanocrystalline structure in carbon steels by ball drop and particle impact techniques" Materials Science and Engineering A 375-377 [899-904], (2004)
  M.Umemoto, Y.Todaka and K.Tsuchiya
  
  
• "Ultrafine grained surface of steels produced by air blast shot peening and drilling" Proceeding of International Symposium on Ultrafine Grained Structures (ISUGS-2003), Geelong, Australia. CDROM, (2004)
  Y.Todaka, M.Umemoto and K.Tsuchiya
  
  
• "Comparison of Nanocrystalline Surface Layer in Steels Formed by Air Blast and Ultrasonic Shot Peening" Materials Transactions 45(2) [376-379], (2004)
  Y.Todaka, M.Umemoto and K.Tsuchiya
  
  
• "Formation of nanocrystalline structure in steels by air blast shot peening and particle impact processing" Materials Science Forum 449-452 [1149-1152], (2004)
  Y.Todaka, M.Umemoto, Y.Watanabe and K.Tsuchiya
  
  
• "Nano-grained steels produced by various severe plastic deformation processes" Ultrafine Grained Materials III, TMS (The Minerals, Metals & Materials Society), eds: Y. T. Zhu, T. G. Langdon, R. Z. Valiev, S. L. Semiatin, D. H. Shin, T. C. Lowe. [241-246], (2004)
  M.Umemoto, Y.Todaka and K.Tsuchiya
  
  
• "Nanocrystallization in carbon steels by various severe plastic deformation processes" Nanomaterials by Severe Plastic Deformation Proceedings of the Conference "Nanomaterials by Severe Plastic Deformation - NANOSPD2", Vienna, Austria, eds: M. Zehetbauer and R. Z. Valiev. [505-510], (2004)
  Y.Todaka, M.Umemoto and K.Tsuchiya
  
  
• "ショットピーニングによる鉄鋼材料表面のナノ結晶化" 日本金属学会誌 67(12) [690-696], (2003)
  戸高義一, 梅本実, 渡辺幸則, 土谷浩一
  
  
• "Nanocrystallization of steels by various severe plastic deformation" Proceeding of “Processing and Properties of Structural Nanomaterials”, Materials Science & Technology 2003 Conference, Chicago, IL, U.S.A. [125-132], (2003)
  M.Umemoto, Y.Todaka and K.Tsuchiya
  
  
• "Formation of nanocrystalline structure in steels by air blast shot peening" Materials Transactions 44(7) [1488-1493], (2003)
  M.Umemoto, Y.Todaka and K.Tsuchiya
  
  
• "Comparison of nanocrystallization in steels by ball milling and ball drop test" Journal of Metastable and Nanocrystalline Materials 15-16 [283-288], (2003)
  H.Nakayama, K.Tsuchiya, Y.Todaka, X.J.Hao, M.Umemoto, K.Morii and T.Shimizu
  
  
• "Nanocrystallization in Fe-C Alloys by Ball Milling and Ball Drop Test" ISIJ International 42(12) [1429-1436], (2002)
  Y.Todaka, M.Umemoto and K.Tsuchiya